Determination of adsorption heat of two boron-containing microporous materials in some organic solvents by microcalorimetry
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Microporous materials have adsorptive property because of their pore structures. In this paper, the adsorption heat of two boron-containing microporous materials for M2[Ga(B5O10)]·4H2O (M = K, Rb) in some organic solvents was measured at 298.15 K 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 K2[Ga(B5O10)]·4H2O in methanol was also studied. Applying thermokinetic model, thermokinetic parameters including rate constants k, reaction order n, activation energy Ea, and pre-exponential factor A for the adsorption process were simultaneously acquired.
KeywordsMicroporous materials Adsorption heat In situ microcalorimetry Thermokinetics
The project was supported by the National Natural Science Foundation of China (No. 21173143). The authors thank the guidance of Prof. Zhi-Hong Liu, Shaanxi Normal University, P. R. China.
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