Thermodynamics and regeneration studies of CO2 adsorption on activated carbon

Qigang Cen, Mengxiang Fang, Tao Wang, Izabela Majchrzak‐Kucęba, Dariusz Wawrzyńczak and Zhongyang Luo

Greenhouse Gases: Science and Technology, 2016, vol. 6, issue 6, 787-796

Abstract: The kinetic and thermodynamic studies of CO2 adsorption on activated carbon were carried out in a fixed bed. Six different CO2 concentrations (from 5% up to 18 vol.%) and four temperatures (303 K, 313 K, 323 K, and 333 K) were applied to investigate dynamic adsorption behaviors. It showed that the increase in temperature led to faster adsorption kinetics, but also reduced the adsorption capacity. An isotherms modeling was made by the Langmuir isotherm model. The experimental isotherms data were well fitted. Then, based on the adsorption isotherms, the isosteric heats of CO2 adsorption were determined by Clausius‐Clapeyron equation. The calculated isosteric heat declined slightly with the adsorbed amount on activated carbon, and had an average value of 16.09 kJ/mol, which is much lower than the actual heat of adsorption measured by calorimeter. Moreover, regeneration experiments by vacuum evacuation (

Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:wly:greenh:v:6:y:2016:i:6:p:787-796

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