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Vol. 26 No. 12 (2014): Vol 26 Issue 12

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Adsorption and Desorption Properties of Coalbed Methane on SBA-15

https://doi.org/10.14233/ajchem.2014.16146
Wenxiang Zheng
Institute of Mining Technology, Taiyuan University of Technology, Taiyuan 030024, Shanxi Province, P.R. China ; Inner Mongolia University of Science and Technology, School of Coal Science and Engineering, Baotou 014047, Neimeng, P.R. China
Zhenghe Liu
Institute of Mining Technology, Taiyuan University of Technology, Taiyuan 030024, Shanxi Province, P.R. China
Lusheng Yang
Institute of Mining Technology, Taiyuan University of Technology, Taiyuan 030024, Shanxi Province, P.R. China; College of Arts and Science, Shanxi Agricultural University, Taigu Shanxi 030801, China

Corresponding Author(s) : Zhenghe Liu

lzhyls2013@126.com; lzhzwx2013@126.com

Asian Journal of Chemistry, Vol. 26 No. 12 (2014): Vol 26 Issue 12

Abstract

The adsorption and desorption properties of coalbed methane on SBA-15 and activated carbon (AC) with the same process were investigated. For the three adsorbents, the adsorption capacity to coalbed methane is the following sequence, activated carbon > SBA-15. The results showed that coalbed methane desorbed from the surface of SBA-15 is easily compared with the other materials. However activated carbon is easier than both of them. Both of adsorption capacity and adsorption strength of SBA-15 sample to coalbed methane are lower than the other two adsorbents, most likely due to the pore diameter of the SBA-15 sample is larger to the molecular diameter of methane. However SBA-15 sample has a larger pore size and specific surface area relative to conventional materials sample, which result in a large value of adsorption capacity of modified SBA-15 sample to coalbed methane. In addition, although the adsorption capacity of SBA-15 sample to coalbed methane is lower in contrast to activated carbon, modified SBA-15 sample is easy to regenerate and has a short time of desorption. Hence, SBA-15 sample, as an adsorbent, is a good choice for the condition of low concentration of coalbed methane.

Keywords

Coalbed methane Activated carbon SBA-15 Adsorption Desorption
Zheng, W., Liu, Z., & Yang, L. (2014). Adsorption and Desorption Properties of Coalbed Methane on SBA-15. Asian Journal of Chemistry, 26(12), 3515–3518. https://doi.org/10.14233/ajchem.2014.16146
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