Volume 41, Issue 9 pp. 1818-1825
Research Article

Separation of Methane and Carbon Dioxide Gas Mixtures Using Activated Carbon Modified with 2-Methylimidazole

Xiao-Xin Zhang

Corresponding Author

Xiao-Xin Zhang

Liaoning Shihua University, College of Chemistry, Chemical Engineering and Environmental Engineering, 113001 Fushun, China

Correspondence: Xiao-Xin Zhang ([email protected]), Liaoning Shihua University, College of Chemistry, Chemical Engineering and Environmental Engineering, Fushun 113001, China.Search for more papers by this author
Peng Xiao

Peng Xiao

China University of Petroleum, State Key Laboratory of Heavy Oil Processing, 102249 Beijing, China

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Guang-Jin Chen

Guang-Jin Chen

China University of Petroleum, State Key Laboratory of Heavy Oil Processing, 102249 Beijing, China

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Chang-Yu Sun

Chang-Yu Sun

China University of Petroleum, State Key Laboratory of Heavy Oil Processing, 102249 Beijing, China

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Lan-Ying Yang

Lan-Ying Yang

China University of Petroleum, State Key Laboratory of Heavy Oil Processing, 102249 Beijing, China

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First published: 06 July 2018
Citations: 7

Abstract

Activated carbon was modified by loading 2-methylimidazole (mIm), ethanol, and glycol onto its surface and adopted to capture CO2 using the absorption-adsorption method. The modified activated carbon showed high selectivity for separating CH4+CO2 gas mixtures, compared with other methods to modify activated carbon given in the literature. The separation factor was 4.75 times higher than that for the fresh activated-carbon system, and the separation performance of the activated carbon increased with increasing amount of mIm. The addition of glycol showed greater potential to enhance the selectivity of the activated carbon than ethanol. A recycling test verified the stability of the modified activated carbon for CH4+CO2 gas mixture separation.

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