{"id":103049,"date":"2025-08-11T11:50:05","date_gmt":"2025-08-11T09:50:05","guid":{"rendered":"https:\/\/www.linseis.com\/sem-categoria\/armazenamento-de-calor-com-zeolitos-determinacao-de-isotermicas-de-adsorcao-usando-analise-gravimetrica-de-sorcao\/"},"modified":"2026-01-12T09:28:40","modified_gmt":"2026-01-12T08:28:40","slug":"armazenamento-de-calor-com-zeolitos-determinacao-de-isotermicas-de-adsorcao-usando-analise-gravimetrica-de-sorcao","status":"publish","type":"post","link":"https:\/\/www.linseis.com\/pt-pt\/conhecimentos\/armazenamento-de-calor-com-zeolitos-determinacao-de-isotermicas-de-adsorcao-usando-analise-gravimetrica-de-sorcao\/","title":{"rendered":"Armazenamento de calor com ze\u00f3litos: Determina\u00e7\u00e3o de isot\u00e9rmicas de adsor\u00e7\u00e3o usando an\u00e1lise gravim\u00e9trica de sor\u00e7\u00e3o"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"103049\" class=\"elementor elementor-103049 elementor-93993\" 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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\u00cdndice\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__1591bbc\" 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__1591bbc\" 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__1591bbc\" 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-f17734b elementor-widget elementor-widget-spacer\" data-id=\"f17734b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/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-b8abbd4 elementor-widget elementor-widget-heading\" data-id=\"b8abbd4\" 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\">Introdu\u00e7\u00e3o e significado das isot\u00e9rmicas de adsor\u00e7\u00e3o<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7097cbb elementor-widget elementor-widget-text-editor\" data-id=\"7097cbb\" 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>A utiliza\u00e7\u00e3o de materiais de sor\u00e7\u00e3o zeol\u00edticos para o armazenamento de calor \u00e9 uma abordagem pioneira no sector da energia, uma vez que oferecem elevadas densidades de energia de armazenamento e um comportamento revers\u00edvel de carga-descarga. As ze\u00f3litas s\u00e3o aluminossilicatos cristalinos com uma estrutura de poros definida e caracterizam-se por uma elevada afinidade e seletividade para gases polares como o vapor de \u00e1gua ou o<sub>CO2<\/sub> (1). A carateriza\u00e7\u00e3o e a otimiza\u00e7\u00e3o espec\u00edficas destes materiais s\u00e3o essenciais para tornar mais eficientes aplica\u00e7\u00f5es como o armazenamento de energia t\u00e9rmica, a refrigera\u00e7\u00e3o ou a purifica\u00e7\u00e3o de gases.  <\/p><p>No centro de toda a investiga\u00e7\u00e3o aplicada no dom\u00ednio do armazenamento de calor est\u00e1 a determina\u00e7\u00e3o exacta das isot\u00e9rmicas de adsor\u00e7\u00e3o, que descrevem o equil\u00edbrio entre a carga e a press\u00e3o parcial do adsorvente. Estas isot\u00e9rmicas fornecem informa\u00e7\u00f5es sobre a capacidade, a seletividade e as propriedades de regenera\u00e7\u00e3o do material e s\u00e3o, portanto, fundamentais para a sele\u00e7\u00e3o e o desenvolvimento de materiais (2). Para aplica\u00e7\u00f5es pr\u00e1ticas, por exemplo no dom\u00ednio do armazenamento de energia, estas isot\u00e9rmicas devem ser determinadas em condi\u00e7\u00f5es realistas, por exemplo, na gama de temperaturas relevante ou para diferentes adsorventes.  <\/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-52f04d3 elementor-widget elementor-widget-heading\" data-id=\"52f04d3\" 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\">Princ\u00edpio da an\u00e1lise gravim\u00e9trica de sor\u00e7\u00e3o<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-16285ce elementor-widget elementor-widget-text-editor\" data-id=\"16285ce\" 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>O m\u00e9todo gravim\u00e9trico para a determina\u00e7\u00e3o das isot\u00e9rmicas de adsor\u00e7\u00e3o caracteriza-se pela sua precis\u00e3o, sensibilidade e ampla gama de medi\u00e7\u00e3o. O m\u00e9todo baseia-se na medi\u00e7\u00e3o exacta da altera\u00e7\u00e3o da massa de um ze\u00f3lito quando este \u00e9 posto em contacto com um adsorvente. Este m\u00e9todo permite o registo direto da cin\u00e9tica de sor\u00e7\u00e3o e dos dados de equil\u00edbrio.  <\/p><p>O ze\u00f3lito \u00e9 ativado antes da medi\u00e7\u00e3o, ou seja, seco termicamente, de modo a remover a \u00e1gua adsorvida ou subst\u00e2ncias residuais e disponibilizar s\u00edtios de sor\u00e7\u00e3o &#8220;frescos&#8221; (3). Isto \u00e9 essencial, pois \u00e9 a \u00fanica forma de garantir um ponto de partida reprodut\u00edvel para a determina\u00e7\u00e3o da isoterma. A amostra \u00e9 ent\u00e3o colocada na configura\u00e7\u00e3o de medi\u00e7\u00e3o numa microbalan\u00e7a altamente sens\u00edvel.  <\/p><p>No centro da <a href=\"https:\/\/www.linseis.com\/messgeraete\/gsa-gravimetrische-sorptionsanalyse\/\">\n  <strong>an\u00e1lise gravim\u00e9trica de sor\u00e7\u00e3o<\/strong>\n<\/a> \u00e9 a medi\u00e7\u00e3o cont\u00ednua da <a href=\"https:\/\/www.linseis.com\/messgroessen\/masseaenderung\/\">\n  <strong>mudan\u00e7a de massa<\/strong>\n<\/a> da amostra durante a exposi\u00e7\u00e3o a press\u00f5es parciais definidas do adsorvente. A amostra \u00e9 colocada numa microbalan\u00e7a de alta precis\u00e3o numa c\u00e2mara de medi\u00e7\u00e3o. Depois de definir uma temperatura espec\u00edfica, a press\u00e3o parcial do adsorvente \u00e9 gradualmente aumentada ou diminu\u00edda (4).  <\/p><p>A altera\u00e7\u00e3o da massa da amostra &#8211; causada por processos de adsor\u00e7\u00e3o ou dessor\u00e7\u00e3o &#8211; \u00e9 registada em tempo real. Uma vez atingido o equil\u00edbrio em cada n\u00edvel de press\u00e3o, a carga \u00e9 determinada. A combina\u00e7\u00e3o de uma balan\u00e7a de precis\u00e3o com resolu\u00e7\u00e3o t\u00edpica de microgramas e ajuste controlado da atmosfera garante isot\u00e9rmicas muito exactas, mesmo com cargas ou press\u00f5es baixas. Para a varia\u00e7\u00e3o de temperatura, a amostra \u00e9 mantida num forno ou term\u00f3stato para que as medi\u00e7\u00f5es isot\u00e9rmicas possam ser efectuadas a diferentes temperaturas.   <\/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-7c288de elementor-widget elementor-widget-spacer\" data-id=\"7c288de\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/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-28b1216 elementor-widget elementor-widget-image\" data-id=\"28b1216\" 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\/08\/Zeolith-1024x576.png\" class=\"attachment-large size-large wp-image-94016\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/08\/Zeolith-1024x576.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/08\/Zeolith-300x169.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/08\/Zeolith-768x432.png 768w, https:\/\/www.linseis.com\/wp-content\/uploads\/2025\/08\/Zeolith.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-db564bf elementor-widget elementor-widget-heading\" data-id=\"db564bf\" 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\">Procedimento de medi\u00e7\u00e3o e an\u00e1lise de dados<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6ffa460 elementor-widget elementor-widget-heading\" data-id=\"6ffa460\" 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\">Prepara a temperatura:<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bf243ae elementor-widget elementor-widget-text-editor\" data-id=\"bf243ae\" 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<ul><li>Ajusta e estabiliza a temperatura de medi\u00e7\u00e3o desejada.<\/li><li>A temperatura e a humidade s\u00e3o cr\u00edticas para os ze\u00f3litos &#8211; mesmo pequenas flutua\u00e7\u00f5es podem influenciar os resultados da medi\u00e7\u00e3o.<\/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-0695b55 elementor-widget elementor-widget-heading\" data-id=\"0695b55\" 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\">Mede a atmosfera:<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3106fe7 elementor-widget elementor-widget-text-editor\" data-id=\"3106fe7\" 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<ul><li>Aumento gradual da press\u00e3o parcial ou da concentra\u00e7\u00e3o do adsorvente na c\u00e9lula de medi\u00e7\u00e3o.<\/li><li>Cada etapa \u00e9 mantida at\u00e9 se atingir o equil\u00edbrio (massa constante da amostra).<\/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-06b3827 elementor-widget elementor-widget-heading\" data-id=\"06b3827\" 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\">Medi\u00e7\u00e3o da massa:<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e424cda elementor-widget elementor-widget-text-editor\" data-id=\"e424cda\" 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<ul><li>Registo cont\u00ednuo da varia\u00e7\u00e3o de massa com uma microbalan\u00e7a.<\/li><li>O aumento de massa corresponde \u00e0 adsor\u00e7\u00e3o &#8211; a quantidade adsorvida \u00e9 registada por cada passo.<\/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-1e86e1f elementor-widget elementor-widget-heading\" data-id=\"1e86e1f\" 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\">Avalia\u00e7\u00e3o da adsor\u00e7\u00e3o:<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c77fba7 elementor-widget elementor-widget-text-editor\" data-id=\"c77fba7\" 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<ul><li>Cria uma <strong>isot\u00e9rmica de adsor\u00e7\u00e3o<\/strong> a partir dos valores individuais (carga vs. press\u00e3o a temperatura constante).<\/li><li>Modelos t\u00edpicos de avalia\u00e7\u00e3o: <strong>equa\u00e7\u00e3o<\/strong> <strong>de Freundlich, Langmuir<\/strong> e <strong>Dubinin-Astakhov<\/strong>.<\/li><li>Particularmente adequado para ze\u00f3litos: <strong>Equa\u00e7\u00e3o de Dubinin-Astakhov<\/strong> (capta as propriedades dos microporos e a heterogeneidade energ\u00e9tica).<\/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-b13650c elementor-widget elementor-widget-heading\" data-id=\"b13650c\" 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\">An\u00e1lise dos dados:<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b6ee3b7 elementor-widget elementor-widget-text-editor\" data-id=\"b6ee3b7\" 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<ul><li>Avalia\u00e7\u00e3o dos dados brutos com base em modelos.<\/li><li>Determina\u00e7\u00e3o dos par\u00e2metros carater\u00edsticos:<ul><li>Capacidade m\u00e1xima de sor\u00e7\u00e3o<\/li><li>Par\u00e2metros de heterogeneidade<\/li><li>Afinidade do adsorvente com o adsorvente<\/li><\/ul><\/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-556bcc5 elementor-widget elementor-widget-heading\" data-id=\"556bcc5\" 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\">Factores que influenciam a precis\u00e3o:<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-64d927f elementor-widget elementor-widget-text-editor\" data-id=\"64d927f\" 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<ul><li>Estabilidade das balan\u00e7as<\/li><li>Homogeneidade da amostra<\/li><li>Controlo preciso da temperatura e da press\u00e3o<\/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-e9fe89b elementor-widget elementor-widget-heading\" data-id=\"e9fe89b\" 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\">Influ\u00eancia da temperatura na adsor\u00e7\u00e3o<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bb40206 elementor-widget elementor-widget-text-editor\" data-id=\"bb40206\" 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>A temperatura tem uma influ\u00eancia decisiva na medi\u00e7\u00e3o e no curso das isotermas de adsor\u00e7\u00e3o em ze\u00f3litos. \u00c0 medida que a temperatura aumenta, a carga de equil\u00edbrio do ze\u00f3lito diminui tipicamente a uma press\u00e3o parcial constante. A raz\u00e3o para isso \u00e9 que a adsor\u00e7\u00e3o \u00e9 um processo exot\u00e9rmico: temperaturas mais altas promovem a dessor\u00e7\u00e3o, pois mais energia t\u00e9rmica est\u00e1 dispon\u00edvel para superar as for\u00e7as de adsor\u00e7\u00e3o (5).  <\/p><p>A carga m\u00e1xima de um ze\u00f3lito \u00e9 direta e significativamente influenciada pela temperatura: \u00e0 medida que a temperatura aumenta, a quantidade m\u00e1xima de adsorvente que pode ser absorvida pelo ze\u00f3lito diminui geralmente. A temperaturas mais baixas, mais adsorvente \u00e9 ligado, enquanto que a temperaturas mais elevadas a adsor\u00e7\u00e3o torna-se mais dif\u00edcil e a dessor\u00e7\u00e3o aumenta. As experi\u00eancias mostram, por exemplo, que a carga de azoto do ze\u00f3lito 13X \u00e9 cerca de 30 % mais elevada a 0 \u00b0C do que a 30 \u00b0C (5).  <\/p><p>A baixas temperaturas, as isot\u00e9rmicas apresentam frequentemente uma curva mais acentuada e uma carga de satura\u00e7\u00e3o mais elevada; a temperaturas mais elevadas, s\u00e3o normalmente mais planas e atingem valores m\u00e1ximos mais baixos. A temperaturas suficientemente elevadas, as isot\u00e9rmicas podem tornar-se quase lineares e a carater\u00edstica t\u00edpica de satura\u00e7\u00e3o enfraquece. <\/p><p>Comparando isot\u00e9rmicas do mesmo material e adsorvente a diferentes temperaturas, podem ser calculadas as entalpias de adsor\u00e7\u00e3o isost\u00e9ricas, valores-chave relevantes para a conce\u00e7\u00e3o t\u00e9cnica e termodin\u00e2mica. As medi\u00e7\u00f5es devem ser sempre efectuadas a uma temperatura controlada e documentada com precis\u00e3o, uma vez que mesmo flutua\u00e7\u00f5es moderadas de temperatura podem levar a desvios consider\u00e1veis nas capacidades de adsor\u00e7\u00e3o determinadas. <\/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-3a6acfc elementor-widget elementor-widget-heading\" data-id=\"3a6acfc\" 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\">Aplica\u00e7\u00e3o pr\u00e1tica e estudos de casos<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f60f16e elementor-widget elementor-widget-text-editor\" data-id=\"f60f16e\" 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>Uma aplica\u00e7\u00e3o t\u00edpica \u00e9 a investiga\u00e7\u00e3o da absor\u00e7\u00e3o de vapor de \u00e1gua de um ze\u00f3lito a 25\u00b0C e press\u00f5es parciais crescentes. As isot\u00e9rmicas mostram um aumento acentuado da carga a press\u00f5es parciais relativamente baixas, o que se deve \u00e0 elevada afinidade dos ze\u00f3litos por mol\u00e9culas polares. A regenerabilidade \u00e9 testada atrav\u00e9s da re-secagem da amostra no v\u00e1cuo ou a temperaturas elevadas &#8211; um aspeto fundamental para aplica\u00e7\u00f5es c\u00edclicas de armazenamento de calor (3). Para o CO2, o m\u00e9todo gravim\u00e9trico pode ser utilizado de forma an\u00e1loga, uma vez que os ze\u00f3litos permitem cargas elevadas mesmo a press\u00f5es moderadas.   <\/p><p>Os par\u00e2metros de avalia\u00e7\u00e3o t\u00edpicos incluem a carga m\u00e1xima e a acessibilidade na gama de press\u00e3o de trabalho, par\u00e2metros de afinidade e intera\u00e7\u00e3o, como a entalpia de sor\u00e7\u00e3o, bem como a seletividade em rela\u00e7\u00e3o a outros gases ou componentes. S\u00e3o necess\u00e1rias s\u00e9ries adicionais de medi\u00e7\u00f5es para determinar a cin\u00e9tica. <\/p><p>A literatura cient\u00edfica confirma o papel central da an\u00e1lise gravim\u00e9trica na carateriza\u00e7\u00e3o moderna de materiais de adsor\u00e7\u00e3o. A determina\u00e7\u00e3o gravim\u00e9trica de isot\u00e9rmicas de adsor\u00e7\u00e3o \u00e9 uma espinha dorsal metodol\u00f3gica para o desenvolvimento e avalia\u00e7\u00e3o de ze\u00f3litos no campo do armazenamento de energia. A inova\u00e7\u00e3o da engenharia de processos, associada a sistemas de medi\u00e7\u00e3o de alta qualidade, oferece \u00e0s equipas de laborat\u00f3rio, investiga\u00e7\u00e3o e desenvolvimento a m\u00e1xima qualidade de dados e fiabilidade de aplica\u00e7\u00e3o &#8211; cruciais para o progresso na gest\u00e3o sustent\u00e1vel do calor e no armazenamento de energia t\u00e9rmica.  <\/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-4bfb6d0 elementor-widget elementor-widget-spacer\" data-id=\"4bfb6d0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/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-2191a13 elementor-widget elementor-widget-heading\" data-id=\"2191a13\" 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\">Conclus\u00e3o<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-abacd98 elementor-widget elementor-widget-text-editor\" data-id=\"abacd98\" 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>A an\u00e1lise gravim\u00e9trica de sor\u00e7\u00e3o estabeleceu-se como um m\u00e9todo indispens\u00e1vel para a carateriza\u00e7\u00e3o de ze\u00f3litos no armazenamento de calor. A sua elevada precis\u00e3o e reprodutibilidade tornam poss\u00edvel determinar isotermas de adsor\u00e7\u00e3o precisas, que servem de base para a sele\u00e7\u00e3o de materiais e otimiza\u00e7\u00e3o de processos. O controlo preciso da temperatura, em particular, est\u00e1 a revelar-se um fator cr\u00edtico, uma vez que mesmo pequenas flutua\u00e7\u00f5es de temperatura t\u00eam um impacto significativo na capacidade de armazenamento.  <\/p><p>O m\u00e9todo n\u00e3o s\u00f3 fornece dados quantitativos sobre a capacidade de sor\u00e7\u00e3o, mas tamb\u00e9m informa\u00e7\u00f5es valiosas sobre as propriedades termodin\u00e2micas dos materiais. Isto torna-o uma ferramenta essencial para o desenvolvimento de sistemas eficientes de armazenamento de energia e contribui significativamente para o progresso da tecnologia de energia sustent\u00e1vel. Os modernos sistemas de medi\u00e7\u00e3o permitem medi\u00e7\u00f5es automatizadas e normalizadas que garantem a mais elevada qualidade e comparabilidade dos resultados.  <\/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-6fd261c elementor-widget elementor-widget-spacer\" data-id=\"6fd261c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/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-110b71a elementor-widget elementor-widget-spacer\" data-id=\"110b71a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/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-1df734c elementor-widget elementor-widget-text-editor\" data-id=\"1df734c\" 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><span style=\"text-decoration: underline;\"><strong>Lista de fontes<\/strong><\/span><\/p><p>(1) <a href=\"https:\/\/mediatum.ub.tum.de\/doc\/820976\/820976.pdf\" data-wplink-edit=\"true\" target=\"_blank\" rel=\"noopener\">https:\/\/mediatum.ub.tum.de\/doc\/820976\/820976.pdf<\/a> &#8211; Estudos de ci\u00eancia dos materiais sobre adsorventes zeol\u00edticos para armazenamento de calor<\/p><p>(2) <a href=\"https:\/\/webdoc.sub.gwdg.de\/ebook\/diss\/2003\/tu-berlin\/diss\/2002\/hauer_andreas.pdf\" target=\"_blank\" rel=\"noopener\">https:\/\/webdoc.sub.gwdg.de\/ebook\/diss\/2003\/tu-berlin\/diss\/2002\/hauer_andreas.pdf<\/a> &#8211; Avalia\u00e7\u00e3o de adsorventes s\u00f3lidos em sistemas de sor\u00e7\u00e3o abertos para armazenamento de calor (Hauer, Diss. 2002)<\/p><p>(3) <a href=\"https:\/\/www.eso.org\/sci\/facilities\/develop\/detectors\/optdet\/docs\/diploma_hose.pdf\" target=\"_blank\" rel=\"noopener\">https:\/\/www.eso.org\/sci\/facilities\/develop\/detectors\/optdet\/docs\/diploma_hose.pdf<\/a> &#8211; An\u00e1lise de carv\u00e3o ativado e ze\u00f3litos &#8211; isotermas de adsor\u00e7\u00e3o gravim\u00e9trica (Hose, 2000)<\/p><p>(4) <a href=\"https:\/\/opendata.uni-halle.de\/bitstream\/1981185920\/34866\/1\/ArifianYosefBenediktAwan_Untersuchung_zurSorption_von_Kohlendioxid_in_neuartigen_por%C3%B6sen_Materialien.pdf\" target=\"_blank\" rel=\"noopener\">https:\/\/opendata.uni-halle.de\/bitstream\/1981185920\/34866\/1\/ArifianYosefBenediktAwan_Untersuchung_zurSorption_von_Kohlendioxid_in_neuartigen_por%C3%B6sen_Materialien.pdf<\/a> &#8211; Tese de licenciatura: Investiga\u00e7\u00e3o da sor\u00e7\u00e3o de di\u00f3xido de carbono em novos materiais porosos &#8211; princ\u00edpio de medi\u00e7\u00e3o por gravimetria<\/p><p>(5) <a href=\"https:\/\/duepublico2.uni-due.de\/servlets\/MCRFileNodeServlet\/duepublico_derivate_00074130\/Diss_Schmittmann.pdf\" target=\"_blank\" rel=\"noopener\">https:\/\/duepublico2.uni-due.de\/servlets\/MCRFileNodeServlet\/duepublico_derivate_00074130\/Diss_Schmittmann.pdf<\/a> &#8211; Influ\u00eancia da temperatura na din\u00e2mica de adsor\u00e7\u00e3o de alcanos de cadeia curta em ze\u00f3litos (Schmittmann, Diss. 2021)<\/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-80202d9 elementor-widget elementor-widget-html\" data-id=\"80202d9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<script type=\"application\/ld+json\">{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@type\": \"FAQPage\",\r\n  \"mainEntity\": [{\r\n    \"@type\": \"Question\",\r\n    \"name\": \"Warum sind Adsorptionsisothermen f\u00fcr die Entwicklung zeolithischer Sorptionsmaterialien so wichtig?\",\r\n    \"acceptedAnswer\": {\r\n      \"@type\": \"Answer\",\r\n      \"text\": \"Herzst\u00fcck jeder angewandten Forschung im Bereich W\u00e4rmespeicherung ist die pr\u00e4zise Bestimmung der Adsorptionsisothermen, die das Gleichgewicht zwischen Beladung und Partialdruck des Adsorptivs beschreiben. Sie liefern Informationen zu Kapazit\u00e4t, Selektivit\u00e4t und Regenerationseigenschaften des Materials und sind damit fundamental f\u00fcr die Materialauswahl und -entwicklung.\"\r\n    }\r\n  },{\r\n    \"@type\": \"Question\",\r\n    \"name\": \"Wie funktioniert die gravimetrische Methode zur Bestimmung von Adsorptionsisothermen?\",\r\n    \"acceptedAnswer\": {\r\n      \"@type\": \"Answer\",\r\n      \"text\": \"Das Verfahren beruht auf der exakten Messung der Masse\u00e4nderung eines Zeoliths, w\u00e4hrend er mit einem Adsorptiv in Kontakt gebracht wird. Diese Methode erm\u00f6glicht die direkte Erfassung der Sorptionskinetik und der Gleichgewichtsdaten.\"\r\n    }\r\n  },{\r\n    \"@type\": \"Question\",\r\n    \"name\": \"Warum wird ein Zeolith vor der gravimetrischen Messung aktiviert?\",\r\n    \"acceptedAnswer\": {\r\n      \"@type\": \"Answer\",\r\n      \"text\": \"Das Zeolith wird vor der Messung aktiviert, das bedeutet thermisch getrocknet, um adsorbiertes Wasser bzw. Reststoffe zu entfernen und \u201efrische\\\" Sorptionspl\u00e4tze verf\u00fcgbar zu machen. Dies ist essentiell, da nur so eine reproduzierbare Ausgangslage f\u00fcr die Isothermenbestimmung gegeben ist.\"\r\n    }\r\n  },{\r\n    \"@type\": \"Question\",\r\n    \"name\": \"Wie beeinflusst die Temperatur die Adsorptionskapazit\u00e4t von Zeolithen?Wie beeinflusst die Temperatur die Adsorptionskapazit\u00e4t von Zeolithen?\",\r\n    \"acceptedAnswer\": {\r\n      \"@type\": \"Answer\",\r\n      \"text\": \"Mit steigender Temperatur nimmt die Gleichgewichtsbeladung des Zeolithen bei konstantem Partialdruck typischerweise ab. Der Grund ist, dass Adsorption ein exothermer Prozess ist: H\u00f6here Temperaturen f\u00f6rdern die Desorption, da mehr thermische Energie zur \u00dcberwindung der Adsorptionskr\u00e4fte zur Verf\u00fcgung steht.\"\r\n    }\r\n  },{\r\n    \"@type\": \"Question\",\r\n    \"name\": \"Warum ist eine exakte Temperaturkontrolle bei Adsorptionsmessungen wichtig?\",\r\n    \"acceptedAnswer\": {\r\n      \"@type\": \"Answer\",\r\n      \"text\": \"Messungen sollten stets bei kontrollierter und exakt dokumentierter Temperatur durchgef\u00fchrt werden, da bereits moderate Temperaturschwankungen zu erheblichen Abweichungen bei den ermittelten Adsorptionskapazit\u00e4ten f\u00fchren k\u00f6nnen.\"\r\n    }\r\n  },{\r\n    \"@type\": \"Question\",\r\n    \"name\": \"Warum spielt die gravimetrische Analyse eine zentrale Rolle bei der Charakterisierung von Zeolithen f\u00fcr Energiespeicheranwendungen?\",\r\n    \"acceptedAnswer\": {\r\n      \"@type\": \"Answer\",\r\n      \"text\": \"Die wissenschaftliche Literatur best\u00e4tigt die zentrale Rolle der gravimetrischen Analyse in der modernen Sorptionsmaterialcharakterisierung. Die gravimetrische Bestimmung von Adsorptionsisothermen ist ein methodisches R\u00fcckgrat f\u00fcr die gezielte Entwicklung und Bewertung von Zeolithen im Bereich der Energiespeicherung. Verfahrenstechnische Innovationskraft, gepaart mit hochwertigen Messsystemen, bietet Labor-, Forschungs- und Entwicklungsteams maximale Datenqualit\u00e4t und Anwendungssicherheit \u2013 entscheidend f\u00fcr Fortschritte im nachhaltigen W\u00e4rmemanagement und in der thermischen Energiespeicherung.\"\r\n    }\r\n  }]\r\n}\r\n<\/script>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\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>A utiliza\u00e7\u00e3o de materiais de sor\u00e7\u00e3o zeol\u00edticos para o armazenamento de calor \u00e9 uma abordagem inovadora no sector da energia, uma vez que oferecem elevadas densidades de energia de armazenamento e um comportamento revers\u00edvel de carga\/descarga.  <\/p>\n","protected":false},"author":15,"featured_media":94003,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[654],"tags":[],"class_list":["post-103049","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-conhecimentos"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/posts\/103049","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/comments?post=103049"}],"version-history":[{"count":0,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/posts\/103049\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/media\/94003"}],"wp:attachment":[{"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/media?parent=103049"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/categories?post=103049"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/tags?post=103049"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}