| Surface Area and Pore Size |
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Application Overview Gas sorption is routinely used to characterize the surface area and pore size distribution of materials. These two important physical properties can greatly influence materials performance characteristics.Surface areas are generally determined using BET analysis of nitrogen isotherms at -196°C but alternative probes can be used. Pore size in the meso and micro range (pore radius between 0-500 Angstroms) are determined using BJH or DA analysis of nitrogen isotherms at -196°C or CO2 isotherms at -10°C to provide higher resolution in the micro-pore range. The IGA-001 can also perform direct pore size studies using probe size, removing the need to use theoretical models. The IGA-001 system can accurately and reproducibly perform the above studies, up to pressures of 20 bar, using the gravimetric technique with our easy-to-use control and analysis software. Advantages of the system are a quantifiable sample degassing stage with the ability to perform high resolution studies and a versatile instrument which can be upgraded to perform more advanced sorption studies. In addition, our HTP1-V volumetric analyser can accurately measure adsorption isotherms up to pressures of 100 bar, or 200 bar with the high pressure option, in the variable low temperature range down to -196°C. This allows the measurement of isotherms up to P/P0 = 1.0 of sorptives with higher saturation pressures. Instrument Information Pages IGA-001 HTP1-V
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