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Catalog excerpts
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HIGH PRESSURE THERMOGRAVIMETRIC ANALYZERS
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TGA Instruments with Magnetic Suspension Balance High Pressure High Temperature Corrosion Resistant
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HIGH PRESSURE THERMOGRAVIMETRY INTRODUCTION Thermogravimetric Analysis (TGA) is a well-established and frequently applied technique measuring the weight of a material as function of temperature. TGA measurements provide information about a material’s stability and decomposition rates and help improve the lifetime and safety of many commercial products. However, many materials are exposed to extreme conditions, such as high pressure or the presence of reactive gas atmospheres or steam, in their normal use. In these cases, standard TGA data does not provide sufficient information and high...
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High Pressure Impacts the Results of TGA Measurements Calcium Oxalate monohydrate CaC2O4·(H2O) is a widely characterized material with well-known and understood weight loss behavior. Upon heating it decomposes in three discrete step changes in weight. The steps are caused by the loss of H20, CO and CO2 2 and 60 bar are compared. The weight changes in each decomposition step are identical and match the expected stoichiometric theoretical change. However, the decomposition temperatures of the steps are shifted towards higher temperatures at higher pressures. Notably, the impact of pressure is...
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HIGH PRESSURE THERMOGRAVIMETRY APPLICATIONS High pressure TGA instruments allow thermogravimetric experiments to be carried out under realistic application conditions. This data provides a better understanding of: • thermal stability, decomposition and lifetime • corrosion, oxidation and reduction • catalyst activation and deactivation • solubility and sorption processes of high-performance materials which are applied under high pressures Thermal stability, decomposition and lifetime High performance polymers are lightweight, durable and corrosion-resistant materials. Due to these...
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Optimization of catalytic reactions Catalytic reactions are of tremendous commercial importance. Over 90% of all chemicals worldwide are manufactured with the aid of solid catalysts. In a high pressure TGA instrument, it is possible to investigate reactions of solids with the gas phase under realistic working conditions. Activation (e.g. by reduction) and deactivation (by oxidation or coking) of a catalyst material is related to a weight change that can be measured in the HP-TGA. Simultanously, the yield and kinetics of the reaction can be monitored by evolved gas analysis with online MS,...
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HIGH PRESSURE THERMOGRAVIMETRY MAGNETIC SUSPENSION BALANCE Unique Magnetic Suspension Balance Technology At the heart of every TA Instruments high pressure thermogravimetric analyzer is a patented* Magnetic Suspension Balance (MSB), which weighs a sample in a closed reactor cell with an externally located microbalance. This is realized by means of a magnetic suspension coupling that transmits the weight force through the wall of the sample cell. MSBs were originally developed and commercialized by Rubotherm, which is now a part of TA Instruments. MSBs provide a complete separation of the...
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HP TGA DISCOVERY & DYNTHERM Discovery HP-TGA and Rubotherm Series DynTHERM TGA: The right high-pressure TGA for every application Only TA Instruments is in the great position to offer two types of Magnetic Suspension Balances. The proprietary new magnetic levitation balance in the Discovery HP-TGA uniquely combines an exceptionally large specification range with the design and ease of use of a standard TGA. The classical Rubotherm Series MSB has been successful for more than 30 years in many research areas, especially in gravimetric sorption analysis and high pressure TGA. With its robust,...
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KEY FEATURES HP-TGA & DYNTHERM Discovery HP-TGA Temperature Range Pressure Range Max. Heating / Cooling rate Sample mass / Weighing range Sample crucible volume Max. sample dimensions (placed directly without crucible) Max. number of gases for blending Steam generator and dosing
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The Discovery HP-TGA features a new toploading MSB with standard ceramic crucibles (shown left), while the DynTHERM TGA to the right offers a larger volume crucible in a classic Rubotherm MSB. HP-TGA & DynTHERM
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HIGH PRESSURE THERMOGRAVIMETRY DISCOVERY HP-TGA Discovery HP-TGA 75 / 750 / 7500 At the core of every Discovery HP-TGA is the new top-loading Magnetic Levitation Furnace Tube Balance. Multiple patented technologies are combined to bring to life a highly sensitive Sample Crucible and compact balance that can operate under high pressure. Heating Element Magnetic Levitation Balance Cell Closure In this unique top-loading Magnetic Levitation Balance, the sample crucible is located Upper Horizontal Quadrupole Bearing at the top of a ceramic suspension shaft. The suspension shaft is equipped with...
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Dynamic High Pressure Reaction Furnace An innovative high-pressure reaction furnace for accurate and responsive temperature control under all pressure and gas flow conditions. The Discovery HP-TGA furnace features a robust corrosion-resistant ceramic tube with an embedded heating element capable of sample temperature control to 1100 °C. Due to the compact low mass design, this furnace can provide heating/cooling rates of up to 200 K/min. The sample temperature is measured with a thermocouple directly adjacent to the sample. A key feature is the Curie-point temperature calibration that can...
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HIGH PRESSURE THERMOGRAVIMETRY DISCOVERY HP-TGA Integrated Gas and Steam Dosing and Blending Systems with Pressure Control In high pressure TGA, the reliability and accuracy of gas flow and pressure control is of utmost importance for the data quality. All Discovery HP-TGA models feature integrated gas dosing and blending systems with pressure control to provide the flexibility to address the widest range of applications. Pressure can be controlled in the range from 200 mbar to 80 bar and complete evacuation to ultimate vacuum is possible as well. All Discovery HP-TGA instruments include a...
Open the catalog to page 13All TA Instruments catalogs and technical brochures
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