The BET theory, named after its developers Brunauer, Emmett, and Teller, is a widely-used method for the analysis of physical adsorption of gas molecules on a solid surface. The theory extends the Langmuir adsorption model to multilayer adsorption, providing a detailed description of surface properties. It is particularly significant in the field of catalysis where understanding the surface area and porosity of catalysts is crucial for their performance.
