Premium
Separation of Methane and Carbon Dioxide Gas Mixtures Using Activated Carbon Modified with 2‐Methylimidazole
Author(s) -
Zhang Xiao-Xin,
Xiao Peng,
Chen Guang-Jin,
Sun Chang-Yu,
Yang Lan-Ying
Publication year - 2018
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201700402
Subject(s) - activated carbon , adsorption , selectivity , chemistry , carbon dioxide , methane , carbon fibers , ethanol , chemical engineering , organic chemistry , materials science , catalysis , composite material , composite number , engineering
Activated carbon was modified by loading 2‐methylimidazole (mIm), ethanol, and glycol onto its surface and adopted to capture CO 2 using the absorption‐adsorption method. The modified activated carbon showed high selectivity for separating CH 4 +CO 2 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 CH 4 +CO 2 gas mixture separation.