Effect of Binders on CH4/N2 Performances of Granular Activated Carbons by Pressure Swing Adsorption

Chin J Mater Res

2011, Vol. 25

Issue (3): 249-254 DOI:

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Effect of Binders on CH4/N2 Performances of Granular Activated Carbons by Pressure Swing Adsorption

LIU Liheng¹，GU Min¹，XIAN Xuefu¹，YU Jiangtao²

1.State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam, College of Resources and Environmental Science, Chongqing University, Chongqing 400044
2. CPI YUNADA Environmental-Protection Engineering Co.,Ltd, Chongqing 401122

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LIU Liheng GU Min XIAN Xuefu YU Jiangtao. Effect of Binders on CH4/N2 Performances of Granular Activated Carbons by Pressure Swing Adsorption. Chin J Mater Res, 2011, 25(3): 249-254.

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Abstract Three kinds of granular activated carbons(GACs), GAC–C, GAC–T and GAC–P were prepared with lignite by using coal tar, tragantine and PAM as binders, respectively. The pore structures and surface functional groups of GAC–C, GAC–T and GAC–P were characterized, and the effects of binders on the CH4/N2 separation performances of GACs by PSA were investigated. The results show that the influences of binders on the performance of GAC for enrichment methane from CH4/N2 are very notable. Among the three kinds of GACs, GAC–T has the best PSA separation performance. When the mass ratio of tragantine to lignite is 0.15–0.20, GAC–T can improve the concentration of CH4 about 28%. The relationship of surface oxygen–containing functional groups contents for GAC–C, GAC–T and GAC–P is GAC–T>GAC–C>GAC–P, and there are some differences in the ranges of pore distribution 10–30 nm, 2–10 nm and 0.4–2 nm for the three GACs. The CH4/N2 separation performances of GAC–C, GAC–T and GAC–P are mainly influenced by basic surface oxygen–containing functional groups and micropore. The higher basic surface oxygen– containing functional groups concentrations are suitable for CH4/N2 separation by PSA, and the micropores from 0.4nm to 0.7nm are the important factors resulting in the separation performance differences of GAC–C, GAC–T and GAC–P.

Key words: inorganic non-metallic materials granular activated carbon pressure swing adsorption CH4/N2 pore structure

Received: 04 January 2011

ZTFLH:

TQ424

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Supported by National Natural Science Foundation of China No.50774104 and Innovative Group No.50621403, Key Program of Ministry of Education No.107090, and Program of Scientific and Technological Funds of China Power Investment Corporation.

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https://www.cjmr.org/EN/ OR https://www.cjmr.org/EN/Y2011/V25/I3/249

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