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SYSTEM AND DYNAMIC VOLUMETRIC METHOD FOR SURFACE CHARACTERIZATION OF POROUS SOLIDS AND POWDER MATERIALS USING FLOWING GAS
SYSTEM AND DYNAMIC VOLUMETRIC METHOD FOR SURFACE CHARACTERIZATION OF POROUS SOLIDS AND POWDER MATERIALS USING FLOWING GAS
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机译:流动气体表征多孔固体和粉末材料的系统和动态体积法。
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摘要
A system and method for surface characterization of a porous solid or powder sample using flowing gas include mass flow controllers configured to deliver a controllable mass flow of a carrier gas and adsorptive gas to vary concentration of the adsorptive gas flowing through at least one measurement channel containing a sample cell. A concentration detector downstream of the sample cell provides a signal indicative of the adsorptive gas concentration to a controller that determines the amount of adsorptive gas adsorbed and/or desorbed to characterize the surface area, pore volume, pore volume distribution, etc. of the sample material. The detector may include a housing, heat exchanger, thermal conductivity detector, and a temperature regulator.
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