STA HP TGA-DSC (STA Simultaneous Thermal Analysis)

 High Pressure TGA-DSC (STA Simultaneous Thermal Analysis)

Thermogravimetry is a technique in which the mass of the sample is monitored against time or temperature while the temperature of the sample, in a specified atmosphere, is programmed. This technique serves the determination of material compositions.

Simultaneous TGA-DTA/DSC measures both heat flow (DSC) and weight changes (TGA) in a material as a function of temperature or time in a controlled atmosphere. Simultaneous measurement of these two material properties not only improves productivity but also simplifies interpretation of the results. The information obtained allows differentiation between endothermic and exothermic events which have no associated weight loss (e.g., melting and crystallization) and those that involve a weight loss (e.g., degradation).

The LINSEIS High Pressure STA (Simultaneous Thermal Analysis) delivers unsurpassed performance. The system can be used to determine simultaneous changes of mass (TG) and caloric reactions (HDSC) under defined atmosphere and pressure (up to 50/150 bar) in the temperature range -170°C up to 1800°C. This instrument is unique because it is the only available pressure STA worldwide. 

The unique characteristics of this product are high precision, high resolution and long term drift stability. The STA Platinum Series was developed to meet the challenging demands of the high temperature and high pressure applications.

Main Application of the High Pressure TGA-DSC:

• Pyrolysis Studies
• Gasification of Coal and Biomass
• Testing of Getter Materials (O2, H2, etc.)
• Metal recuction / oxidation studies

Specifications:

* different heaters 

** not possible with Graphite heater

 Software:

All LINSEIS thermo analytical instruments are PC controlled. The individual software modules exclusively run under Microsoft® Windows® operating systems. The complete software consists of 3 modules: temperature control, data acquisition and data evaluation. The 32 bit software incorporates all essential features for measurement preparation, execution, and evaluation of a STA measurement. Thanks to our specialists and application experts, LINSEIS was able to develop comprehensive easy to understand user friendly application software.

General Features

• Program capable of text editing
• Data security in case of power failure
• Thermocouple break protection
• Repetition measurements with minimum parameter input
• Evaluation of current measurement
• Curve comparison up to 32 curves
• Storage and export of evaluations
• Export and import of data ASCII
• Data export to MS Excel
• Multi-methods analysis (DSC TG, TMA, DIL, etc.)
• Zoom function
• 1 and 2 derivation
• Programmable gas control
• Statistical evaluation package
• Free scaling

TG – Features

• Mass change as % and mg
• Rate Controlled Mass Loss
• Evaluation of mass loss
• Residue mass evaluation

HT-DSC – Features

• Glass transition temperature
• Curve subtraction
• Complex peak evaluation
• Multipoint calibration for sample temperature
• Multipoint calibration for change of enthalpy
• Cp calibration for heat flow
• Signal-steered measuring procedures

Applications:

Application Areas

• Pyrolysis Studies
• Gasification of Coal and Biomass
• CO2 sequestration
• Testing of Getter Materials (O2, H2, etc.)
• Metal reduction/oxidation Studies
• Gas Sorption Analysis
• Density Determination
• Gas Storage
• Zeolites
• Catalysts
• In-situ Gas Analysis (FTIR, Raman, ELIF)
• Kinetic Analysis
• Corrosive Atmospheres - Magnetic Suspension Balance
• Adsorption Isotherms (BET Surface Analysis)
• TPD, TPO, TPR measurements (-196 to 1800 °C)

Coal gasification:

Example of Coal Sample being gasified under CO2 Atmosphere. Experimental Conditions: 20 bar N2 during heating, 10 bar CO2 during gasification.

Coal gasification in CO2 Atmosphere unter 20 bar pressure:

This application shows a typical measurement of a Charcoal gasification under Carbon Dioxide atmosphere at a pressure of 20 bar.

Comparison of Calcium Oxalate decomposition under normal Atmosphere and Pressure:

Comparison of Calcium Oxalate decomposition under Pressure (20 bar, red curve) vs. atmospheric condition (blue curve). A significant pressure dependence of the decomposition steps 1 and 3 can be observed. The decomposition steps 1 and 3 are shifted to higher temperatures at elevated pressure..

Accessories:

Here is a short extract of our available accessories:

• Various gas boxes: manual, semi-automatic and MFC regulated
• Steam generator
• Pressure control
• Wide range of crucibles (gold, silver, platinum, aluminum, Al2O3, graphite, tungsten, stainless steel (high pressure), etc.)
• Various rotary and turbo-molecular pumps

Watch the Linseis STA HP TGA-DSC (High Pressure STA - Simultaneous Thermal Analysis)