速度論に基づく活性炭における混合ガスの吸着平衡の予測

概要

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The multicomponent adsorption rate theory based on Dubinin-Astakhov model (MART-DA), which has been proposed in the previous report, is a practical model for predicting break-through curves of gas mixtures on activated carbon filter. In this paper, the MART-DA has been tested for abilities to predict total and component capacities reported for 13 sets of binary gas adsorption equilibria. Verified by the experimental data, it has been found that the MART-DA is successful in predicting adsorption equilibria of gas mixtures on activated carbon, and this precisions of prediction is comparable to that of the ideal adsorbed solution theory (IAST). From the mathematical study, a multicomponent adsorption isotherm equation (for N⪰2) has been derived from the MART-DA. For pure gas adsorption (for N=1), this isotherm equation is theoretically identical with Dubinin-Astakhov equation. Moreover, it has been clarified that the adsorption/desorption kinetics calculated from MART-DA is equivalent to the linear driving force (LDF) approximated adsorption rate calculation.
社団法人日本建築学会の論文
2007-05-30