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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| BET theory | 4/4 | https://en.wikipedia.org/wiki/BET_theory | reference | science, encyclopedia | 2026-05-05T10:03:51.162056+00:00 | kb-cron |
=== Catalysis === In the field of solid catalysis, the surface area of catalysts is an important factor in catalytic activity. Inorganic materials such as mesoporous silica and layered clay minerals have high surface areas of several hundred m2/g calculated by the BET method, indicating the possibility of application for efficient catalytic materials.
=== Specific surface area calculation === The ISO 9277 standard for calculating the specific surface area of solids is based on the BET method. The method has also been adapted for determination of specific area of ceramics and non-ferrous metal powders.
=== Thermal desorption === In 2023, researchers in the United States developed a method to determine BET surface areas using a thermogravimetric analyzer (TGA). This method uses a TGA to heat a porous sample loaded with an adsorbate, the produced plot of sample mass vs. temperature is then mapped into a standard isotherm to which BET theory is applied as normal. Common fluids, e.g. water or toluene, can be used as adsorbates for the TGA method allowing the specific interactions of different adsorbates to be determined, as these frequently differ from the commonly used nitrogen.
== See also == Adsorption Capillary condensation Langmuir adsorption model Mercury intrusion porosimetry Physisorption Surface tension
== References ==