: mean free energy of adsorption, KJ/mol : Dubinin-Astakhov dimensionless exponent : temperature, K : universal gas constant, KJ/mol·K
BET
Linear form
Alternative form
: BET isotherm constant which indicates energy of surface interaction, L/mg : saturation concentration of adsorbate, mg/L : isotherm constant for BET adsorption in the first layer, L/mg : isotherm constant for BET adsorption in upper layers, mg/L