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Brunauer–Emmett–Teller (BET) theory aims to explain the physical adsorption of gas molecules on a solid surface and serves as the basis for an important analysis technique for the measurement of the specific surface area of materials. The BET theory applies to systems of multilayer adsorption and usually utilises probing gases, nitrogen is the most commonly used, that do not chemically react with material surfaces as adsorbates to quantify specific surface area. Applications typically include the measurement of surface area of macro and mesoporous materials such as catalysts, zeolites and adsorbents.
ICAM equipment includes:
- Coulter Omnisorp at Imperial College London for surface area and porosity analysis of solid materials using nitrogen gas adsorption.
- Micromeritics Tristar and Micromeritics 3Flex at Imperial College London for porous materials characterisation, including surface area, pore size distribution, pore volume and gas sorption capacity.
- Gemini 2360 Surface Area Analyser at The University of Manchester measures the surface area of samples.
