STA HP 1/2 high pressure

High-pressure thermobalance up to 150 bar

Description

To the point

The Linseis HP-TGA-DSC high-pressure thermogravimetric analyzer opens up entirely new application areas in simultaneous thermal analysis. The system can detect both weight changes (TG) and calorimetric reactions (DTA/DSC) in the temperature range from RT to 1800°C and in the pressure range up to 50/150 bar.

This device is the only high-pressure STA available worldwide. A water vapor generator as well as complex gas controls are optionally available. Analysis of the evolved gases can be performed at any time using QMS or FTIR systems.

This system features both extremely high resolution and long-term drift stability. This high-pressure STA was developed to meet the demanding requirements of extremely high temperatures and pressures.

Main applications of the high-pressure STA:

Pyrolysis investigations
Gasification of coal and biomass
Metal reduction/oxidation

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Specifications

Model	STA HP
Temperature range:	170°C up to 1200°C / 1600°C / 1800°C
Vacuum:	Up to 10^-4 mbar
Max. Pressure:	max. 150 bar (Custom solutions available upon request)
Temperature precision:	0.05°C

TG
Resolution:	0.1 μg	0.1 μg
Sample weight:	The scales can recognise the weight automatically	The scales can recognise the weight automatically
Measuring range:	25 / 2500 mg	35000 mg
DSC
DSC resolution:	0,3 / 0,4 / 1 µW	0,3 / 0,4 / 1 µW
DSC sensors:	E /K / S / B / C	E /K / S / B / C
Calorimetric sensitivity:	ca. 4 / 6 / 17.6 / 22.5 μW	ca. 4 / 6 / 17.6 / 22.5 μW
DTA
DTA resolution:	0.03 nV	0.03 nV
Sensitivity:	1.5 μV / mW	1.5 μV / mW
DTA measuring ranges:	250 / 2500 μV	250 / 2500 μV

Available accessories

Different gas boxes: manual, semi-automatic, and MFC controlled
Water vapor generator
Pressure control
A variety of crucibles (gold, silver, platinum, aluminum, Al₂O₃, graphite, tungsten, stainless steel (high pressure), etc.)
Crucible press
Various rotary and turbomolecular pumps

Sensors

Furnace Programm

Temperature	Type	Element	Atmosphere	TC-Type
-70°C – 400°C	L81/24/RCF	HangDown only Intracooler / Kanthal	inert, oxid, red, vac.	K
-150°C – 500°C	L81/24/500	Kanthal	inert, oxid, red, vac.	K
-150°C – 700°C	L81/24/700	Kanthal	inert, oxid, red, vac.	K
-150°C – 1000°C	L81/24/1000	Kanthal	inert, oxid, red, vac.	K
RT – 1200°C	L81/HF	IR Heater	inert, oxid, red, vac.	S
RT – 1000°C	L81/20AC	SiC	inert, oxid, red, vac.	K
RT – 1600°C	L81/20AC	SiC	inert, oxid, red, vac.	S
RT – 1750°C	L81/250	MoSi2	inert, oxid, vac.	B
RT – 2000°C	L81/20/G/2000	Graphite	inert, red.	C
RT – 2400°C	L81/20/G/2400	Graphite	inert, red.	Pyrometer
RT – 2800°C	L81/20/G/2800	Graphite	inert, red.	Pyrometer
RT – 2400°C	L81/20/T	Tungsten	inert, red.	C
RT – 1000°C	L81/200	Glow igniter	inert, oxid, red, vac.	S/K

Software

Making values visible and comparable

The powerful LINSEIS thermal analysis software, which is based on Microsoft® Windows®, performs the most important function in the preparation, execution and evaluation of thermoanalytical experiments, in addition to the hardware used. With this software package, Linseis offers a comprehensive solution for programming all device-specific settings and control functions, as well as for data storage and evaluation. The package was developed by our in-house software specialists and application experts and has been tried and tested over many years.

General functions

- - Real-time color display
  - Multi-method analysis (DSC TG, TMA, DIL, etc.)
  - Text editing program
  - Automatic and manual scaling
  - Repeat measurements with minimal parameter input
  - Customizable axis representation (e.g., temperature (x-axis) versus Delta L (y-axis))
  - Mathematical calculations (e.g., first and second derivatives)
  - Storage of complete evaluations
  - Multitasking function
  - Multi-user function
  - Zoom function for curve sections
  - Curve comparison with up to 50 curves
  - Online Help Menu
  - Free labeling
  - ASCII data import
  - EXCEL® and ASCII export of measurement data

Storage of evaluations
Analysis of current measurement
Data smoothing
Offset correction
Cursor function
Statistical curve analysis (mean curve with confidence interval)
Repeat measurements with minimal parameter input
Tabular expression of data and expansion coefficients
Calculation of Alpha Phys, Alpha Tech, relative expansion L/L0
Curve arithmetic, addition, subtraction, multiplication
Programmable gas control
Data security in case of power failure
Protection against thermocouple breakage
Statistical evaluation package
Automatic calibration
Optional kinetics and lifetime prediction
Software packages

TG Properties:

Percentage (%) and absolute (mg/ug) mass change
Evaluation of mass loss
Determination of residual mass
1st and 2nd derivative (Peak temperature of mass change)
“How to dynamic rate TGA measurement” (optional feature for a fee)

HDSC Properties:

Complete determination of glass transition temperature
Specific heat capacity (Cp) determination
Multiple melting points for temperature calibration
Peak flatness/enthalpy determination (various baseline types)
Enthalpy determination considering mass change
Determination of onset, peak, inflection, and end temperatures

Applications

Application Example: Coal Gasification

The coal was heated under a nitrogen atmosphere at 50 bar pressure. The mass signal shows the loss of volatile components between 20 and 40 minutes. After water vaporized, the coal was gasified and almost completely consumed by 150 minutes, resulting in the formation of H², CO, CH³OH, and other useful reactive gases.

Application Example: Hydrogen Adsorption on Titanium at 700°C

An activated, porous titanium surface was heated under vacuum to 700°C. At the target temperature, hydrogen was introduced, and the pressure was increased in an isothermal step. The weight gain of the sample indicates the amount of hydrogen adsorbed on the titanium surface as a function of pressure, leading to saturation (2.5% weight) at 5 bar.