Determination of adsorption heat of two boron-containing microporous materials in some organic solvents by microcalorimetry

摘要

Microporous materials have adsorptive property because of their pore structures. In this paper, the adsorption heat of two boron-containing microporous materials for M-2[Ga(B5O10)]4H(2)O (M=K, Rb) in some organic solvents was measured at 298.15K by using microcalorimeter. The results indicate that the larger the pore size, the higher is the heat of adsorption and the higher is the adsorption capacity. In addition, the thermokinetics of adsorption process of K-2[Ga(B5O10)]4H(2)O in methanol was also studied. Applying thermokinetic model, thermokinetic parameters including rate constants k, reaction order n, activation energy E-a, and pre-exponential factor A for the adsorption process were simultaneously acquired.