{"id":112679,"date":"2025-07-02T10:04:39","date_gmt":"2025-07-02T08:04:39","guid":{"rendered":"https:\/\/www.linseis.com\/nicht-kategorisiert\/kataliz-arastirmalarinda-tg-dta-reaksiyon-davranisinin-ve-kararliliginin-degerlendirilmesi\/"},"modified":"2026-01-23T10:52:56","modified_gmt":"2026-01-23T09:52:56","slug":"kataliz-arastirmalarinda-tg-dta-reaksiyon-davranisinin-ve-kararliliginin-degerlendirilmesi","status":"publish","type":"post","link":"https:\/\/www.linseis.com\/tr\/bilgi\/kataliz-arastirmalarinda-tg-dta-reaksiyon-davranisinin-ve-kararliliginin-degerlendirilmesi\/","title":{"rendered":"Kataliz ara\u015ft\u0131rmalar\u0131nda TG\/DTA: reaksiyon davran\u0131\u015f\u0131n\u0131n ve kararl\u0131l\u0131\u011f\u0131n\u0131n de\u011ferlendirilmesi"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"112679\" class=\"elementor elementor-112679 elementor-87231\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d57f291 e-flex e-con-boxed e-con e-parent\" data-id=\"d57f291\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b851da7 elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"b851da7\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h2&quot;],&quot;exclude_headings_by_selector&quot;:[],&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;marker_view&quot;:&quot;numbers&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\t\u0130\u00e7indekiler\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__b851da7\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__b851da7\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__b851da7\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1919de7 elementor-widget elementor-widget-heading\" data-id=\"1919de7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Teoriden prati\u011fe: Kataliz ara\u015ft\u0131rmalar\u0131nda bir ara\u00e7 olarak TG\/DTA<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b225df0 elementor-widget elementor-widget-text-editor\" data-id=\"b225df0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Kataliz\u00f6rler, kimyasal sentez, egzoz gaz\u0131 ar\u0131t\u0131m\u0131 veya enerji depolama gibi bir\u00e7ok end\u00fcstriyel s\u00fcrecin merkezinde yer almaktad\u0131r. T\u00fcketilmeden kimyasal reaksiyonlar\u0131 h\u0131zland\u0131rma yetenekleri, onlar\u0131 malzeme ve proses ara\u015ft\u0131rmalar\u0131nda merkezi bir inceleme nesnesi haline getirmektedir. Bir kataliz\u00f6r\u00fcn <b>termal kararl\u0131l\u0131\u011f\u0131n\u0131n, redoks davran\u0131\u015f\u0131n\u0131n ve yap\u0131sal de\u011fi\u015fikliklerinin<\/b> nas\u0131l karakterize edilebilece\u011fi sorusu, laboratuvar uygulamalar\u0131 i\u00e7in \u00f6zellikle \u00f6nemlidir &#8211; \u00e7\u00fcnk\u00fc bunlar daha sonraki kullan\u0131mda etkinli\u011fi \u00fczerinde \u00f6nemli bir etkiye sahiptir.  <\/p><p>Bu, a\u015fa\u011f\u0131daki gibi termal analiz y\u00f6ntemlerinin kullan\u0131ld\u0131\u011f\u0131 yerdir <a href=\"https:\/\/www.linseis.com\/messgeraete\/tga-thermogravimetrie\/\" data-auto-event-observed=\"true\"><strong>termogravimetri (TG)<\/strong><\/a> ve <a href=\"https:\/\/www.linseis.com\/messgeraete\/differenz-thermoanalyse\/\" data-auto-event-observed=\"true\"><strong>diferansiyel termal analiz (DTA)<\/strong><\/a> devreye girer. Her ne kadar katalitik reaksiyonlar\u0131n kendileri do\u011frudan analiz edilemese de <a href=\"https:\/\/www.linseis.com\/messgeraete\/thermische-analyse\/sta-simultane-thermische-analyse\/\" data-auto-event-observed=\"true\"><strong>STA<\/strong><\/a><b>Kataliz\u00f6r malzemesindeki<\/b> dehidrasyon, ayr\u0131\u015fma, oksijen sal\u0131n\u0131m\u0131 veya oksidasyon durumundaki de\u011fi\u015fiklikler gibi <b>prosesle ilgili de\u011fi\u015fiklikleri<\/b> hassas bir \u015fekilde analiz etmek m\u00fcmk\u00fcnd\u00fcr. Bu bilgiler <b>termal stabilite, aktivasyon potansiyeli ve ya\u015flanma davran\u0131\u015f\u0131<\/b> hakk\u0131nda de\u011ferli bilgiler sa\u011flar.  <\/p><p>TG ve DTA&#8217;y\u0131 birle\u015ftiren modern e\u015f zamanl\u0131 termal analiz\u00f6rler, bu t\u00fcr etkilerin geni\u015f bir s\u0131cakl\u0131k aral\u0131\u011f\u0131nda ve tan\u0131mlanm\u0131\u015f atmosferik ko\u015fullar alt\u0131nda ayr\u0131nt\u0131l\u0131 bir \u015fekilde incelenmesini sa\u011flar. \u00d6rne\u011fin, reaksiyon pik kaymalar\u0131<strong>, <\/strong><b>ba\u015flang\u0131\u00e7 s\u0131cakl\u0131klar\u0131 veya k\u00fctle kay\u0131plar\u0131<\/b> \u00f6l\u00e7\u00fclebilir, bu da malzemedeki de\u011fi\u015fiklikler hakk\u0131nda sonu\u00e7lar \u00e7\u0131kar\u0131lmas\u0131na olanak tan\u0131r &#8211; \u00f6rne\u011fin termal ya\u015flanma, oksidasyon veya indirgeme s\u0131ras\u0131nda. <\/p><p>Bouba ve di\u011ferleri [2] ve Duan ve di\u011ferleri [1] taraf\u0131ndan yap\u0131lan \u00e7al\u0131\u015fmalar, TG\/DTA&#8217;n\u0131n \u00f6zellikle taze ve ya\u015flanm\u0131\u015f numuneleri kar\u015f\u0131la\u015ft\u0131rarak veya k\u00fctle spektrometresi gibi di\u011fer y\u00f6ntemlerle birle\u015ftirerek bir kataliz\u00f6r\u00fcn reaktivitesi ve deaktivasyon e\u011filimi hakk\u0131nda dolayl\u0131 g\u00f6stergeler bile sa\u011flayabilece\u011fini g\u00f6stermi\u015ftir.  <\/p><p>Bu nedenle bu makale, termal veya oksidatif kullan\u0131m s\u0131ras\u0131nda stabil kalmas\u0131 gereken malzemelere \u00f6zellikle odaklanarak, <b>TG\/DTA&#8217;n\u0131n kataliz\u00f6rlerin<\/b> termal <b>olarak ilgili \u00f6zelliklerinin de\u011ferlendirilmesine ne \u00f6l\u00e7\u00fcde katk\u0131da bulunabilece\u011fine<\/b> odaklanmaktad\u0131r.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-089db90 elementor-widget elementor-widget-heading\" data-id=\"089db90\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Termogravimetri (TG): Kataliz ara\u015ft\u0131rmalar\u0131nda prensip, yap\u0131 ve uygulama<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ffd63eb elementor-widget elementor-widget-text-editor\" data-id=\"ffd63eb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Termogravimetri (TG), kontroll\u00fc termal ko\u015fullar alt\u0131nda k\u00fctle de\u011fi\u015fimlerini analiz etmek i\u00e7in kullan\u0131lan yerle\u015fik bir y\u00f6ntemdir. Kataliz ara\u015ft\u0131rmalar\u0131nda, \u00f6ncelikle kataliz\u00f6r kullan\u0131lmadan \u00f6nce ve sonra ayr\u0131\u015fma, desorpsiyon veya oksidasyon\/red\u00fcksiyon gibi <b>termal olarak ind\u00fcklenen s\u00fcre\u00e7leri<\/b> izlemek i\u00e7in kullan\u0131l\u0131r. <\/p><h4>\u00d6l\u00e7\u00fcm prensibi ve sistem mimarisi<\/h4><p>TG sistemleri, <b>s\u0131cakl\u0131\u011fa dayan\u0131kl\u0131 bir mikro teraziyi<\/b> bir f\u0131r\u0131n sistemi ve tan\u0131mlanm\u0131\u015f atmosfer kontrol\u00fc ile birle\u015ftirir. Numune, belirli bir s\u0131cakl\u0131k program\u0131 boyunca s\u00fcrekli olarak tart\u0131l\u0131r. <strong>K\u00fctledeki de\u011fi\u015fim<\/strong> &#8211; genellikle miligram alt\u0131 aral\u0131kta &#8211; a\u015fa\u011f\u0131dakilerden kaynaklan\u0131r:  <\/p><ul><li><b>Adsorbatlar\u0131n gazdan ar\u0131nd\u0131r\u0131lmas\u0131 (\u00f6rn. H\u2082O, CO\u2082),<\/b><\/li><li><b>Organik veya inorganik bile\u015fenlerin ayr\u0131\u015fmas\u0131,<\/b><\/li><li>Redoks malzemelerinde <b>oksijen sal\u0131n\u0131m\u0131 veya emilimi<\/b>.<\/li><\/ul><p><br><b>Terazi<\/b>, artan s\u0131cakl\u0131kla birlikte sapmay\u0131 en aza indirmek i\u00e7in <b>termal olarak ayr\u0131\u015ft\u0131r\u0131lm\u0131\u015ft\u0131r<\/b>. \u0130ste\u011fe ba\u011fl\u0131 olarak, gaz geli\u015fmeleri, \u00f6zellikle reaksiyon mekanizmalar\u0131yla ilgili olan TG-MS veya TG-FTIR gibi birle\u015ftirme teknikleri kullan\u0131larak analiz edilebilir. <\/p><h4>Kataliz\u00f6rler i\u00e7in uygulama<\/h4><p>Katalitik olarak aktif malzemeler i\u00e7in TG, di\u011fer \u015feylerin yan\u0131 s\u0131ra a\u015fa\u011f\u0131dakilere de izin verir:<\/p><ul><li><b>tersine \u00e7evrilebilir ve tersine \u00e7evrilemez k\u00fctle de\u011fi\u015fimi aras\u0131ndaki ayr\u0131m,<\/b><\/li><li>Katalitik kullan\u0131mdan sonra <b>kok olu\u015fumunun de\u011ferlendirilmesi<\/b>,<\/li><li><b>Aktif bile\u015fenlerin buharla\u015fmas\u0131 nedeniyle malzeme kayb\u0131n\u0131n tespiti<\/b>,<\/li><li><b>ya\u015flanma veya termal deaktivasyonun karakterizasyonu.<\/b><\/li><\/ul><p><br>Ayn\u0131 ko\u015fullar alt\u0131nda <b>taze ve ya\u015fland\u0131r\u0131lm\u0131\u015f numuneler aras\u0131ndaki kar\u015f\u0131la\u015ft\u0131rma<\/b>, ifadeleri ay\u0131rt etmek i\u00e7in \u00e7ok \u00f6nemlidir. Bu ba\u011flamda, TG e\u011frisi termal kararl\u0131l\u0131k verilerinden daha fazlas\u0131n\u0131 sa\u011flar &#8211; malzemenin i\u015flem sonucunda ne \u00f6l\u00e7\u00fcde de\u011fi\u015fti\u011fini g\u00f6sterir. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f78cc05 elementor-widget elementor-widget-heading\" data-id=\"f78cc05\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Diferansiyel termal analiz (DTA)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-26582d2 elementor-widget elementor-widget-text-editor\" data-id=\"26582d2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Diferansiyel termal analiz (DTA), bir numune ile ayn\u0131 s\u0131cakl\u0131ktaki bir referans aras\u0131ndaki s\u0131cakl\u0131k fark\u0131n\u0131 \u00f6l\u00e7er. Herhangi bir reaksiyon ger\u00e7ekle\u015fmedi\u011fi s\u00fcrece sinyal s\u0131f\u0131rda kal\u0131r &#8211; her iki pota da e\u015fzamanl\u0131 olarak \u0131s\u0131n\u0131r. Sadece numune bir reaksiyon sonucunda referanstan <b>daha fazla veya<\/b> <b>daha<\/b> <b>az \u0131s\u0131 emdi\u011finde veya sald\u0131\u011f\u0131nda<\/b> \u00f6l\u00e7\u00fclebilir bir fark olu\u015fur: numune <b>daha s\u0131cak veya daha so\u011fuk hale gelir ve<\/b> cihaz\u0131n konvansiyonuna ba\u011fl\u0131 olarak sistemin pozitif veya negatif bir sinyal kaydetmesine neden olur.  <\/p><p><b>Is\u0131 a\u00e7\u0131\u011fa \u00e7\u0131karan<\/b> reaksiyonlar (\u00f6rn. <a href=\"https:\/\/www.linseis.com\/wissen\/oxidationsinduktionszeit-und-temperatur\/\" data-auto-event-observed=\"true\"><strong>OKS\u0130DASYONLAR<\/strong><\/a>) ekzotermik pikler olu\u015ftururken <a href=\"https:\/\/www.linseis.com\/wissen\/endotherme-vs-exotherme-reaktionen\/\" data-auto-event-observed=\"true\"><b>endotermik s\u00fcre\u00e7ler<\/b><\/a> (\u00f6rn. <a href=\"https:\/\/www.linseis.com\/wissen\/phasenuebergang-eines-stoffs-schmelzen\/\" data-auto-event-observed=\"true\"><strong>erime<\/strong><\/a> veya dehidrasyon) ters zirvelere yol a\u00e7ar. Bu piklerin \u015fekli, konumu ve alan\u0131 sonu\u00e7lar\u0131n \u00e7\u0131kar\u0131lmas\u0131n\u0131 sa\u011flar: <\/p><ul><li><b>reaksiyon entalpisi<\/b> (kalibrasyon s\u0131ras\u0131nda),<\/li><li><b>Faz ge\u00e7i\u015fleri<\/b> ve bunlar\u0131n tersine \u00e7evrilebilirli\u011fi,<\/li><li><b>Reaksiyon h\u0131z\u0131<\/b> ve malzeme da\u011f\u0131l\u0131m\u0131 g\u00f6stergeleri.<\/li><\/ul><p><br>TG ile birlikte termal olaylar, \u00f6rne\u011fin adsorbatlar\u0131n oksidasyonu veya \u00f6nc\u00fcllerin ayr\u0131\u015fmas\u0131 gibi belirli k\u00fctle kay\u0131plar\u0131na net bir \u015fekilde atanabilir. Kataliz ara\u015ft\u0131rmalar\u0131nda, DTA b\u00f6ylece malzeme de\u011fi\u015fiklikleri veya aktivite s\u00fcre\u00e7leri hakk\u0131nda sonu\u00e7lara var\u0131lmas\u0131n\u0131 sa\u011flayan <strong>spesifik enerjik imzalar<\/strong> sa\u011flar. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1125964 elementor-widget elementor-widget-heading\" data-id=\"1125964\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">STA cihazlar\u0131 ile e\u015f zamanl\u0131 \u00f6l\u00e7\u00fcm<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6a0e05a elementor-widget elementor-widget-text-editor\" data-id=\"6a0e05a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>E\u015fzamanl\u0131 termal analiz\u00f6rler TG ve DTA&#8217;y\u0131 tek bir sistemde birle\u015ftirir. K\u00fctle ve \u0131s\u0131 ak\u0131\u015f\u0131n\u0131n e\u015fzamanl\u0131 \u00f6l\u00e7\u00fcm\u00fc, karma\u015f\u0131k reaksiyon s\u00fcre\u00e7lerinin hassas bir \u015fekilde \u00e7\u00f6z\u00fclmesini sa\u011flar. Cihaz\u0131n \u00f6zellikleri:  <\/p><ul><li>Y\u00fcksek \u00e7\u00f6z\u00fcn\u00fcrl\u00fck ve 1600 \u00b0C&#8217;ye kadar \u00f6l\u00e7\u00fcm hassasiyeti,<\/li><li>S\u0131cakl\u0131k de\u011fi\u015fim oranlar\u0131 50 K\/dk&#8217;ya kadar,<\/li><li>\u00c7e\u015fitli olas\u0131 \u00f6l\u00e7\u00fcm atmosferleri (\u00f6rn. hava, oksijen, nitrojen, argon),<\/li><li>K\u00fc\u00e7\u00fck numune miktarlar\u0131 ile y\u00fcksek hassasiyet.<br><br><br><\/li><\/ul><p><b>\u00d6zellikle termal olarak aktive edilen proseslerde<\/b>, <b>DTA reaksiyon dinamiklerini dolayl\u0131 olarak \u00e7\u0131karmak i\u00e7in kullan\u0131labilir:<\/b> ba\u015flang\u0131\u00e7 s\u0131cakl\u0131\u011f\u0131, pik \u015fekli ve pik alan\u0131 gibi parametreler enerjik aktivasyon, reaksiyon h\u0131z\u0131 ve d\u00f6n\u00fc\u015f\u00fcm\u00fcn kapsam\u0131 hakk\u0131nda bilgi <b>sa\u011flayabilir<\/b>. \u00d6rne\u011fin, Bouba ve arkada\u015flar\u0131 [2] hidrokraking kataliz\u00f6rlerinin reaksiyon davran\u0131\u015f\u0131ndaki farkl\u0131l\u0131klar\u0131n, \u00f6zellikle taze ve ya\u015fland\u0131r\u0131lm\u0131\u015f numuneler kar\u015f\u0131la\u015ft\u0131r\u0131l\u0131rken, DTA piklerinin kaymas\u0131 ve \u015fekli yoluyla tan\u0131mlanabilece\u011fini g\u00f6stermi\u015ftir.  <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fe3b1c1 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"fe3b1c1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/07\/Katalysator-Beitrag-1-1-1024x576.png\" class=\"attachment-large size-large wp-image-87194\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/07\/Katalysator-Beitrag-1-1-1024x576.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/07\/Katalysator-Beitrag-1-1-300x169.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/07\/Katalysator-Beitrag-1-1-768x432.png 768w, https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/07\/Katalysator-Beitrag-1-1.png 1140w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-28ef146 elementor-widget elementor-widget-heading\" data-id=\"28ef146\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Reaksiyon h\u0131z\u0131 ve reaksiyon entalpisi: bir g\u00f6sterge olarak termal analiz<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e2b8233 elementor-widget elementor-widget-text-editor\" data-id=\"e2b8233\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>Bu nedenle pratik uygulamalarda ara\u015ft\u0131rmac\u0131lar, farkl\u0131 numune durumlar\u0131n\u0131 birbirleriyle kar\u015f\u0131la\u015ft\u0131rmak i\u00e7in genellikle DTA e\u011frisinden elde edilen ba\u015flang\u0131\u00e7 s\u0131cakl\u0131\u011f\u0131 veya pik alan\u0131 gibi karakteristik parametreleri kullan\u0131rlar.<\/b> Bu parametreler kinetik anlamda reaksiyon h\u0131z\u0131n\u0131n do\u011frudan belirlenmesine izin vermese de, <b>termal olarak aktive edilebilir s\u00fcre\u00e7lerin ya\u015flanma, zehirlenme veya yap\u0131sal<\/b> <b>de\u011fi\u015fiklikler nedeniyle zay\u0131flay\u0131p zay\u0131flamad\u0131\u011f\u0131<\/b> <b>veya ertelenip ertelenmedi\u011fi<\/b> hakk\u0131nda bilgi sa\u011flarlar. Bunun bir \u00f6rne\u011fi, taze ve ya\u015flanm\u0131\u015f hidrokraking kataliz\u00f6rlerinin termal davran\u0131\u015flar\u0131ndaki farkl\u0131l\u0131klar\u0131n ekzotermik DTA piklerindeki kaymalarla g\u00f6sterildi\u011fi Bouba ve arkada\u015flar\u0131n\u0131n [2] \u00e7al\u0131\u015fmas\u0131yla sa\u011flanm\u0131\u015ft\u0131r. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-08e8a60 elementor-widget elementor-widget-heading\" data-id=\"08e8a60\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Reaksiyon entalpisini tan\u0131ma<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fcdc31c elementor-widget elementor-widget-text-editor\" data-id=\"fcdc31c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>Ekzotermik reaksiyonlar &#8211; kataliz\u00f6r y\u00fczeyindeki oksidasyonlar gibi &#8211; DTA veya DSC e\u011frisinde karakteristik pik yap\u0131lar\u0131 olu\u015fturur.<\/b>  Cihaz konfig\u00fcrasyonuna ve konvansiyona ba\u011fl\u0131 olarak, ekzotermik bir olay ya yukar\u0131 ya da a\u015fa\u011f\u0131 do\u011fru bir sinyal olarak g\u00f6r\u00fcn\u00fcr. Belirleyici fakt\u00f6r, uygun bir standartla (\u00f6rn. indiyum veya \u00e7inko) kalibrasyon yap\u0131lmas\u0131 ko\u015fuluyla <b>, pikin alt\u0131ndaki alan\u0131n a\u00e7\u0131\u011fa \u00e7\u0131kan reaksiyon entalpisiyle<\/b> ( <b><sub>\u0394Hr<\/sub><\/b> ) <b>orant\u0131l\u0131<\/b> olmas\u0131d\u0131r. <br><br><b>Co\u2083O\u2084 kataliz\u00f6rleri \u00fczerinde metan oksidasyonu<\/b> \u00fczerine yap\u0131lan bir \u00e7al\u0131\u015fmada, Duan ve arkada\u015flar\u0131 [1] bu reaksiyonun termal imzas\u0131n\u0131n DTA ve DSC kullan\u0131larak nas\u0131l yakalanabilece\u011fini g\u00f6stermi\u015ftir. Pik alan\u0131n\u0131n &#8211; ve dolay\u0131s\u0131yla \u00f6l\u00e7\u00fclen entalpinin &#8211; <b>kataliz\u00f6r miktar\u0131na g\u00fc\u00e7l\u00fc bir \u015fekilde ba\u011fl\u0131 olmas\u0131<\/b> \u00f6zellikle dikkat \u00e7ekiciydi. Bu, <b>aktif merkezlerin enerjik doygunluk davran\u0131\u015f\u0131n\u0131n<\/b> belirli y\u00fcklemelerde meydana geldi\u011finin bir g\u00f6stergesi olarak yorumlanmaktad\u0131r. Aktif merkezler t\u00fckendi\u011finde veya yan reaksiyonlar taraf\u0131ndan bloke edildi\u011finde gram kataliz\u00f6r ba\u015f\u0131na reaksiyon entalpisi azal\u0131r &#8211; bu da deaktivasyonun ba\u015flang\u0131c\u0131 olarak yorumlanabilecek bir olgudur.    <br><br>Buna ek olarak, oksidasyon TG e\u011frisindeki k\u00fctle kayb\u0131 ile ayn\u0131 s\u0131cakl\u0131k aral\u0131\u011f\u0131nda meydana gelmi\u015ftir, bu da termal olay\u0131n belirli bir malzeme d\u00f6n\u00fc\u015f\u00fcm\u00fcne (muhtemelen CO\u2082 ve su sal\u0131n\u0131m\u0131 yoluyla) atanmas\u0131na izin vermektedir.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4e89fc9 elementor-widget elementor-widget-heading\" data-id=\"4e89fc9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Reaksiyon h\u0131z\u0131n\u0131 t\u00fcretme<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0a4ef7b elementor-widget elementor-widget-text-editor\" data-id=\"0a4ef7b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>TG\/DTA do\u011frudan kinetik \u00f6l\u00e7\u00fcmler olmasa bile, <b>pik konumunu (<sub>Tmax<\/sub>), pik geni\u015fli\u011fini ve ba\u015flang\u0131\u00e7 s\u0131cakl\u0131\u011f\u0131n\u0131 (<sub>ton<\/sub>)<\/b> analiz ederek reaksiyon h\u0131z\u0131n\u0131n yakla\u015f\u0131k olarak tahmin edilmesini sa\u011flar. H\u0131zl\u0131 bir reaksiyonun tipik bir g\u00f6stergesi, d\u00fc\u015f\u00fck ba\u015flang\u0131\u00e7 s\u0131cakl\u0131\u011f\u0131na sahip keskin, yo\u011fun bir DTA pikidir. Piklerin daha y\u00fcksek s\u0131cakl\u0131klara kaymas\u0131, \u00f6rne\u011fin kataliz\u00f6r deaktivasyonu nedeniyle reaktivitenin azald\u0131\u011f\u0131n\u0131 g\u00f6sterebilir.  <\/p><p>Bu ili\u015fkiler, anahtar kinetik parametre olan <b>aktivasyon enerjisinin (<sub>EA<\/sub>)<\/b> \u0131s\u0131tma h\u0131z\u0131n\u0131 de\u011fi\u015ftirerek ve Tmax <sub>kaymas\u0131n\u0131<\/sub> analiz ederek belirlendi\u011fi klasik Kissinger y\u00f6ntemi taraf\u0131ndan da kullan\u0131l\u0131r. TG&#8217;den elde edilen k\u00fctle kayb\u0131 verileriyle birlikte, reaksiyon dinamiklerinin sa\u011flam bir resmi elde edilir. <br><br>Uygulamadan bir \u00f6rnek, hidrokraking kataliz\u00f6rlerini incelemek i\u00e7in TG\/DSC kullanan Bouba ve arkada\u015flar\u0131n\u0131n (2015) \u00e7al\u0131\u015fmas\u0131nda bulunabilir. DTA e\u011frilerini ve TG k\u00fctle kay\u0131plar\u0131n\u0131 analiz ederek, kataliz\u00f6r\u00fcn farkl\u0131 aktivasyon durumlar\u0131nda reaksiyon h\u0131z\u0131nda belirgin farkl\u0131l\u0131klar tespit etmi\u015flerdir. \u00d6zellikle<sub>kil s\u0131cakl\u0131\u011f\u0131<\/sub>, yeni ba\u015flayan deaktivasyonun hassas bir g\u00f6stergesi oldu\u011funu kan\u0131tlamaktad\u0131r [2].   <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2c924c7 elementor-widget elementor-widget-heading\" data-id=\"2c924c7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Aktivite kayb\u0131n\u0131n tan\u0131nmas\u0131: TG\/DTA e\u011frilerinde kataliz\u00f6rlerin deaktivasyonu<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6474100 elementor-widget elementor-widget-text-editor\" data-id=\"6474100\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Kataliz\u00f6rlerin laboratuvarda de\u011ferlendirilmesinde kilit nokta sadece ba\u015flang\u0131\u00e7taki aktiviteleri de\u011fil, ayn\u0131 zamanda zaman i\u00e7indeki <b>stabilite davran\u0131\u015flar\u0131d\u0131r<\/b>. Termal analiz &#8211; \u00f6zellikle TG\/DTA \u015feklinde &#8211; <b>aktivite kay\u0131plar\u0131n\u0131n <\/b>erken bir a\u015famada tan\u0131nmas\u0131 ve \u00f6l\u00e7\u00fclmesi i\u00e7in son derece hassas bir ara\u00e7t\u0131r. <\/p><h4>Devre d\u0131\u015f\u0131 b\u0131rakman\u0131n termal i\u015faretleri<\/h4><p>Yeni ba\u015flayan bir aktivite kayb\u0131n\u0131n tipik \u00f6zellikleri hem TG hem de DTA e\u011frilerinde g\u00f6r\u00fclebilir. G\u00f6ze \u00e7arpan i\u015faretler \u015funlar\u0131 i\u00e7erir <\/p><ul><li><b>DTA piklerinin<\/b> daha y\u00fcksek s\u0131cakl\u0131klara <b>kaymas\u0131<\/b>: Daha y\u00fcksek aktivasyon bariyerlerinin ve daha d\u00fc\u015f\u00fck reaktivitenin g\u00f6stergesi.<\/li><li><b>Pik alan\u0131n\u0131n azalmas\u0131:<\/b> Azalan bir reaksiyon entalpisini g\u00f6sterir &#8211; genellikle daha d\u00fc\u015f\u00fck bir d\u00f6n\u00fc\u015f\u00fcm oran\u0131n\u0131n sonucudur.<\/li><li><b>De\u011fi\u015fen TG e\u011frileri:<\/b> \u00f6rne\u011fin daha d\u00fcz k\u00fctle kay\u0131plar\u0131 veya \u00f6rne\u011fin kok olu\u015fumu veya yap\u0131sal de\u011fi\u015fiklikler nedeniyle yeni a\u015famalar\u0131n ortaya \u00e7\u0131kmas\u0131.<\/li><\/ul><p><br>Tipik bir senaryo, <b>aktif merkezlerin<\/b> adsorbat bindirmesi veya termal bozunma yoluyla kademeli olarak <b>pasifle\u015ftirilmesidir<\/b> ve tekrarlanan s\u0131cakl\u0131k d\u00f6ng\u00fcleri ile reaktivitedeki kademeli d\u00fc\u015f\u00fc\u015fle g\u00f6r\u00fclebilir. Uygulamada, taze ve ya\u015flanm\u0131\u015f kataliz\u00f6rler aras\u0131ndaki farklar, karma\u015f\u0131k reaksiyon aparatlar\u0131na gerek kalmadan bu \u015fekilde tan\u0131nabilir [1]. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7839006 elementor-widget elementor-widget-heading\" data-id=\"7839006\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">\u00d6rnek: Hidrokraking kataliz\u00f6rleri<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a97c63b elementor-widget elementor-widget-text-editor\" data-id=\"a97c63b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>Hidrokraking katalizi \u00fczerine yapt\u0131klar\u0131 TG\/DSC \u00e7al\u0131\u015fmas\u0131nda Bouba ve arkada\u015flar\u0131 [2], kataliz\u00f6rlerin deaktivasyon e\u011filimlerinin termal \u00f6zellikler temelinde nas\u0131l izlenebilece\u011fini g\u00f6stermi\u015ftir &#8211; ancak reaksiyonun kendisini \u00f6l\u00e7erek de\u011fil, kullan\u0131mdan \u00f6nce ve sonra kataliz\u00f6r \u00f6rneklerini analiz ederek. <\/b>  \u00d6rnekler katalitik bir s\u00fcre\u00e7 s\u0131ras\u0131nda sistematik olarak al\u0131n\u0131r, kurutulur ve TG\/DSC&#8217;de analiz edilir. Bu y\u00f6ntem, kok olu\u015fumu, yap\u0131sal bozulma veya y\u00fczey kimyas\u0131ndaki de\u011fi\u015fiklikler gibi termal olarak ilgili de\u011fi\u015fikliklerin \u00f6l\u00e7\u00fclmesini m\u00fcmk\u00fcn k\u0131lar. <\/p><p>De\u011ferlendirmede, <b>pik pozisyonu (<sub>Tmax<\/sub>)<\/b> ve <strong>pik alan\u0131<\/strong> en \u00f6nemli parametreler olarak ortaya \u00e7\u0131km\u0131\u015ft\u0131r:<\/p><ul><li><b>Reaksiyon maksimumunun<\/b> daha <b>y\u00fcksek s\u0131cakl\u0131klara kaymas\u0131<\/b>, \u00f6rne\u011fin bloke olmu\u015f aktif merkezlerin bir sonucu olarak, enerjik olarak daha zor bir reaksiyona i\u015faret etmektedir.<\/li><li><b>Azalan pik alan\u0131<\/b>, muhtemelen daha d\u00fc\u015f\u00fck reaksiyon yo\u011funlu\u011fu veya y\u00fczey de\u011fi\u015fiklikleri nedeniyle daha az \u0131s\u0131 sal\u0131n\u0131m\u0131na i\u015faret eder.<\/li><\/ul><p><br>Buna ek olarak, TG e\u011frisinde taze kataliz\u00f6rlerde <b>g\u00f6zlenmeyen<\/b> <b>yeni k\u00fctle<\/b> <b>kay\u0131plar\u0131<\/b> meydana geldi &#8211; <b>g\u00f6zenek yap\u0131s\u0131 kay\u0131plar\u0131, art\u0131k malzemelerin oksidasyonu veya kok olu\u015fumunun<\/b> g\u00f6stergeleri olarak yorumland\u0131. Bu parametreler <b>, STA&#8217;da katalitik reaksiyonun kendisinin \u00f6l\u00e7\u00fclmesine gerek kalmadan<\/b>, \u00e7al\u0131\u015fma ko\u015fullar\u0131 alt\u0131nda bir kataliz\u00f6r\u00fcn kararl\u0131l\u0131\u011f\u0131 hakk\u0131nda de\u011ferli bilgiler sa\u011flar.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1f00441 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"1f00441\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"450\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/07\/Katalysator-Beitrag-2-1-1024x576.png\" class=\"attachment-large size-large wp-image-87205\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/07\/Katalysator-Beitrag-2-1-1024x576.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/07\/Katalysator-Beitrag-2-1-300x169.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/07\/Katalysator-Beitrag-2-1-768x432.png 768w, https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/07\/Katalysator-Beitrag-2-1.png 1140w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ce44b01 elementor-widget elementor-widget-heading\" data-id=\"ce44b01\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Tekrarlanabilirlik ve d\u00f6ng\u00fcsel \u00f6l\u00e7\u00fcmler<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1d5092b elementor-widget elementor-widget-text-editor\" data-id=\"1d5092b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Termal analizin bir avantaj\u0131, \u00f6rne\u011fin \u0131s\u0131tma\/so\u011futma d\u00f6ng\u00fcleri veya reaksiyon gazlar\u0131yla tekrarlanan i\u015flemler yoluyla d\u00f6ng\u00fcsel <b>\u00f6l\u00e7\u00fcmlerin<\/b> ger\u00e7ekle\u015ftirilebilmesinin kolayl\u0131\u011f\u0131d\u0131r. Bunlar, ger\u00e7ek\u00e7i ko\u015fullar alt\u0131nda malzemenin kararl\u0131l\u0131\u011f\u0131 hakk\u0131nda g\u00fcvenilir bilgi sa\u011flar. Tamamen spektroskopik y\u00f6ntemlerin aksine, <b>fonksiyonel \u00f6zellikler<\/b> burada do\u011frudan g\u00f6zlemlenebilir.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-391e45d elementor-widget elementor-widget-heading\" data-id=\"391e45d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Pratik \u00f6rnek: Co\u2083O\u2084 kataliz\u00f6rleri \u00fczerinde metan oksidasyonunun termoanalitik incelemesi (Duan ve ark. [1]'e g\u00f6re)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ec07f42 elementor-widget elementor-widget-text-editor\" data-id=\"ec07f42\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Duan ve arkada\u015flar\u0131 \u00e7al\u0131\u015fmalar\u0131nda, <b>TG\/DSC analizlerini<\/b> kullanarak <b>kobalt(III) oksit kataliz\u00f6rleri (Co\u2083O\u2084) \u00fczerinde metan\u0131n oksidatif ayr\u0131\u015fmas\u0131n\u0131<\/b> incelemi\u015flerdir. Ama\u00e7, \u00f6zellikle <b>a\u00e7\u0131\u011fa \u00e7\u0131kan reaksiyon \u0131s\u0131s\u0131<\/b> ve s\u0131cakl\u0131k profilindeki de\u011fi\u015fiklikler g\u00f6z \u00f6n\u00fcnde bulundurularak kataliz\u00f6r\u00fcn <b>termal aktivitesini ve ya\u015flanma direncini<\/b> \u00f6l\u00e7mekti. <\/p><h4>Metodoloji<\/h4><ul><li><b>Kataliz\u00f6r:<\/b> \u00c7e\u015fitli katk\u0131 maddeleri ile k\u0131smen modifiye edilmi\u015f Co\u2083O\u2084 tozu<\/li><li><b>Reaksiyon atmosferi: <\/b>sentetik hava (%80 N\u2082, %20 O\u2082)<\/li><li><b>S\u0131cakl\u0131k program\u0131:<\/b> 700 \u00b0C&#8217;ye kadar do\u011frusal \u0131s\u0131tma<\/li><li><b>Ama\u00e7:<\/b> Reaksiyon entalpilerinin ve aktivite e\u011frilerinin TG\/DSC ile kar\u015f\u0131la\u015ft\u0131r\u0131lmas\u0131<\/li><\/ul><h4>Sonu\u00e7lar<\/h4><ul><li><b>DSC: <\/b>CH\u2084 \u2192 CO\u2082 + H\u2082O oksidasyonuna kar\u015f\u0131l\u0131k gelen yakla\u015f\u0131k 300-350 \u00b0C&#8217;de ekzotermik pikler<br>\u2192 <b>Pik alan\u0131<\/b> artan metan miktar\u0131 ve kataliz\u00f6r modifikasyonu ile artm\u0131\u015ft\u0131r &#8211; daha y\u00fcksek aktivite veya spesifik \u0131s\u0131 sal\u0131n\u0131m\u0131n\u0131n bir g\u00f6stergesi<\/li><li><b>TG:<\/b> Reaksiyon gaz faz\u0131nda ger\u00e7ekle\u015fti\u011fi i\u00e7in \u00f6nemli bir k\u00fctle kayb\u0131 yok &#8211; yine de paralel s\u00fcre\u00e7ler i\u00e7in bir referans sinyali olarak \u00f6nemli<\/li><li><b>Kataliz\u00f6r modifikasyonunun etkisi:<\/b> Belirli katk\u0131 maddeleri reaksiyon maksimumunu a\u015fa\u011f\u0131ya do\u011fru kayd\u0131rm\u0131\u015ft\u0131r &#8211; bu da daha d\u00fc\u015f\u00fck bir aktivasyon bariyerine ve dolay\u0131s\u0131yla artan aktiviteye i\u015faret eder<\/li><\/ul><h4>Laboratuvar ilgisi<\/h4><p>Bu ara\u015ft\u0131rma, kataliz\u00f6r sisteminin termal olarak tespit edilebilir reaksiyon \u0131s\u0131s\u0131 \u00fcretmesi ko\u015fuluyla, TG\/DSC&#8217;nin <b>katalitik gaz reaksiyonlar\u0131n\u0131n kalitatif ve kantitatif de\u011ferlendirmesi<\/b> i\u00e7in de uygun oldu\u011funu g\u00f6stermektedir. Laboratuvar kullan\u0131c\u0131lar\u0131 i\u00e7in bu \u015fu anlama gelmektedir <\/p><ul><li>Reaksiyon entalpisine dayal\u0131 <b>kataliz\u00f6r form\u00fclasyonlar\u0131n\u0131n kar\u015f\u0131la\u015ft\u0131r\u0131lmas\u0131<\/b> <\/li><li>Termal veya kimyasal strese ba\u011fl\u0131 <b>aktivite de\u011fi\u015fikliklerinin de\u011ferlendirilmesi<\/b> <\/li><li><b>Optimum \u00e7al\u0131\u015fma s\u0131cakl\u0131\u011f\u0131 aral\u0131klar\u0131n\u0131n belirlenmesi<\/b><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-841cc27 elementor-widget elementor-widget-heading\" data-id=\"841cc27\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Sonu\u00e7 ve genel bak\u0131\u015f<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-91317ad elementor-widget elementor-widget-text-editor\" data-id=\"91317ad\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>TG\/DTA gibi termoanalitik y\u00f6ntemler katalitik reaksiyon mekanizmalar\u0131 hakk\u0131nda do\u011frudan bilgi sa\u011flamaz, ancak <b>s\u0131cakl\u0131\u011f\u0131n etkisi alt\u0131ndaki kataliz\u00f6rlerin durumunu ve de\u011fi\u015fimlerini anlamak<\/b> s\u00f6z konusu oldu\u011funda <b>vazge\u00e7ilmez ara\u00e7lard\u0131r <\/b>. \u00d6zellikle <b>termal kararl\u0131l\u0131k, kal\u0131nt\u0131lar, deaktivasyon ve yap\u0131sal de\u011fi\u015fikliklerin<\/b> de\u011ferlendirilmesi s\u00f6z konusu oldu\u011funda, reakt\u00f6r tabanl\u0131 \u00f6l\u00e7\u00fcm sistemlerinin tek ba\u015f\u0131na sunamayaca\u011f\u0131 bir katk\u0131 sa\u011flarlar.<\/p><p>Analiz edilen \u00e7al\u0131\u015fmalar, <b>kar\u015f\u0131la\u015ft\u0131rmal\u0131 \u00f6l\u00e7\u00fcmlerin <\/b>&#8211; \u00f6rne\u011fin taze ve ya\u015flanm\u0131\u015f numuneler aras\u0131nda &#8211; <b>g\u00fc\u00e7 kayb\u0131, kok olu\u015fumu veya malzeme bozulmas\u0131<\/b> hakk\u0131nda net sonu\u00e7lar \u00e7\u0131kar\u0131lmas\u0131na izin verdi\u011fini g\u00f6stermektedir. G\u00fcc\u00fc <b>, basit uygulama, y\u00fcksek hassasiyet ve karma\u015f\u0131k s\u00fcre\u00e7leri dolayl\u0131 olarak g\u00f6rselle\u015ftirme becerisinin birle\u015f<\/b>iminde yatmaktad\u0131r. <\/p><p>Gelecekte, teknolojinin kendisinden ziyade <b>pratikle ilgili senaryolarda hedeflenen uygulam<\/b> alar\u0131na odaklan\u0131lacakt\u0131r: \u00f6rne\u011fin, rejeneratif kataliz\u00f6rlerin geli\u015ftirilmesi, yeni ta\u015f\u0131y\u0131c\u0131 malzeme t\u00fcrlerinin karakterizasyonu veya uzun s\u00fcreli \u00e7al\u0131\u015fmada ya\u015flanma s\u00fcre\u00e7lerinin sistematik analizi. TG\/DTA&#8217;y\u0131 stratejik olarak kullananlar, saf malzeme de\u011ferlendirmesinin \u00f6tesinde proses optimizasyonuna de\u011ferli katk\u0131larda bulunabilirler &#8211; reakt\u00f6r testinin <b>yerine de\u011fil, metodolojik bir tamamlay\u0131c\u0131s\u0131 olarak<\/b>. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-45809a2 elementor-widget elementor-widget-text-editor\" data-id=\"45809a2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>Referanslar<\/strong><\/p><p>[1] Duan, W. ve di\u011ferleri.  <em>Yanma kataliz\u00f6r\u00fcn\u00fcn \u00f6n incelemesi i\u00e7in bir ara\u00e7 olarak diferansiyel termal analiz teknikleri.<\/em>  Scientific Reports, 13, 11010 (2023). DOI: 10.1038\/s41598-023-36912-5<br>[2] Bouba, L. ve ark. <em>TGA-DSC: Hidrokraking Kataliz\u00f6rlerinin De\u011ferlendirilmesi i\u00e7in Bir Tarama Arac\u0131<\/em>. A\u00e7\u0131k Uygulamal\u0131 Bilimler Dergisi, 5, 103-112 (2015). DOI: 10.4236\/ojapps.2015.52008<br>[3] Bhargava, S. K. et al. <em>Additive Manufacturing for Chemical Sciences and Chemical Engineering<\/em>. Springer Nature Singapur (2024). DOI: <a href=\"https:\/\/doi.org\/10.1007\/978-981-97-0978-6\" target=\"_blank\" rel=\"noopener\">10.1007\/978-981-97-0978-6<\/a>   <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Kataliz\u00f6rler, kimyasal sentez, egzoz gaz\u0131 son i\u015flem veya enerji depolama gibi bir\u00e7ok end\u00fcstriyel prosesin kalbinde yer al\u0131r.  <\/p>\n","protected":false},"author":3,"featured_media":112680,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[754],"tags":[],"class_list":["post-112679","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bilgi"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/posts\/112679","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/comments?post=112679"}],"version-history":[{"count":0,"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/posts\/112679\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/media\/112680"}],"wp:attachment":[{"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/media?parent=112679"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/categories?post=112679"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.linseis.com\/tr\/wp-json\/wp\/v2\/tags?post=112679"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}