Kinetic Trapping and Adsorption Equilibration of Binary Mixtures within Nanopores
Kinetic Trapping and Adsorption Equilibration of Binary Mixtures within Nanopores
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纳米孔内二元混合物的动力学捕获和吸附平衡
DOI:
10.1021/acs.jpcc.9b11978
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Calbi, M. Mercedes
中科院分区:
文献类型:
--
作者:
Morgan, Sean M.;Calbi, M. Mercedes
We investigate the kinetics of competitive adsorption of binary gas mixtures in restrictive nano-porous materials by simulating the uptake dynamics of the mixture inside a longitudinal pore via a Kinetic Monte Carlo scheme. Adsorption/desorption events of the gas occur only through the ends of the pore, and the gas transport inside the pore is limited to single-file diffusion. Under these conditions, we show how the difference between the adsorption/desorption rates of species, together with the transport restrictions imposed by the single-file diffusion, leads to eventual trapping of the weaker species at equilibrium. In this situation, while the total distribution of the mixture along the pore is uniform at equilibrium, the distributions of the individual components are not. Remarkably, this kinetic trapping causes a deviation from the composition of the adsorbed mixture expected at equilibrium.
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DOI:
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发表时间:
2012
期刊:
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