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.

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.

Oct 13, 2024 · The BET analysis is a cornerstone technique in material science for evaluating the surface area and porosity of materials through nitrogen (N2) adsorption-desorption isotherms. This method is essential for characterizing porous materials such as catalysts, adsorbents, and nanostructured materials.

Jan 1, 2015 · The BET equation is used for determining the surface area of solids from the nitrogen sorption isotherm at liquid nitrogen temperatures, but the equation has also been used with a wide range of other gases and vapours.

BET Theory seeks to explain the physical adsorption of gas molecules onto solid surfaces

The BET instrument applied by Particle Analytical (Micromeritics Gemini 2375 and Gemini V) determines the specific surface area (m²/g) of pharmaceutical samples.

Brunauer–Emmett–Teller (BET) theory is used to measure the surface area of solid or porous materials. It gives important information on their physical structure as the area of a material’s surface affects how that solid will interact with its environment.

Mar 15, 2012 · For ν1 ≈ ν2, which is a realistic approximation as the pressure and the surface coverage increase, V tends to Vm. At this limit, Eq. (4) applies. To cite an example at 77 K, RT = 0.6 kJ mol −1. Then for (q1 − qL) = 4.2 kJ mol −1, C ≈ 1100, whereas for (q1 − …

Equipment for N2 adsorption/desorption experiments. where Wm is the mass of gas adsorbed as monolayer at a relative pressure P/P0; P0 is the saturated vapour pressure; C is the BET constant; NA = is the Avagadro number; M is the molecular weight of adsorbate, σ is the cross sectional area of adsorbate, S is the total surface area.

BET Surface Area Gas adsorption: Determination of the specific surface area (BET surface area) The determination of specific surface areas represents a major task regarding the characterization of porous and finely-dispersed solids.