Effects of pore structure of granular activated carbons on CH4 enrichment from CH4/N2 by vacuum pressure swing adsorption

被引：71

作者：

Gu, Min ^{[1
]}

Zhang, Bo ^{[1
]}

Qi, Zhendong ^{[1
]}

Liu, Zhenjian ^{[1
]}

Duan, Shuo ^{[1
]}

Du, Xidong ^{[1
]}

Xian, XueFu ^{[1
]}

机构：

[1] Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Coll Resources & Environm Sci, Chongqing 400044, Peoples R China

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2015年 / 146卷

关键词：

Pore structure; Granular activated carbon; CH4; enrichment; Selectivity; Pressure swing adsorption; SURFACE-PROPERTIES; SEPARATION; METHANE; GAS; MIXTURES; NITROGEN; COAL;

D O I：

10.1016/j.seppur.2015.03.051

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A series of granular activated carbons (GACs) of similar surface properties but different pore structures were prepared, and used to enrich methane from methane and nitrogen mixture (CH4/N-2) by vacuum pressure swing adsorption (VPSA) method. The adsorption isotherms of CH4 and N-2 illustrated that the adsorption affinity of GAC for CH4 over N-2 is dependent on the pore structure. It was found that larger surface areas are favorable to CH4 enrichment. The effective pore size for the CH4 enrichment is from 5.0 angstrom to 13 angstrom, with the optimum effect occurring in the range from 5.0 angstrom to 8.0 angstrom. By a single-bed VPSA measurement, the CH4 has a purity up to 66.6 vol%, enriched from CH4 (30 vol%)/N-2 (70 vol%) mixture by using optimum pore-size GAC. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：213 / 218

页数：6

共 27 条

[1] Surface properties of granular activated carbons from agricultural by-products and their effects on raw sugar decolorization [J].