Abstract

The ambient temperature is a non-negligible factor when evaluating the adsorption performance of automobile activated carbon. In this study, dynamic tests of butane adsorption on activated carbon were carried out at ambient temperatures of 293 K, 313 K, and 333 K. In addition, molecular simulation method was used to analyze the influence mechanism of temperature on the adsorption performance of activated carbon. The results show that the working capacity of automotive activated carbon decreases by 15.9% to 20.2% and the butane breakthrough time is shortened by 21.4% to 37.5%, as the ambient temperature is increased from 293 K to 333 K. In the high temperature environment, the thermal movement of the gas molecules is more intense so that the kinetic energy and diffusion coefficient of the butane molecules are increased. When activated carbon adsorbs multilayer butane molecules, the temperature increase mainly reduces the adsorption sites after the first adsorption layer (around 5.5 Å).

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