Competitive adsorption of methane and carbon dioxide at nanometer level

DOI

10.2991/meita-16.2017.36How to use a DOI?

Keywords

Competitive adsorption; Methane;CO2; Nanometer level

Abstract

From macro perspective, main factors affecting adsorption of CH4 by coals include coal particle size, pore structure, coal rank, moisture, temperature and pressure, etc.. The adsorption capacity of CH4 by coals is affected by multiple factors. The adsorption experiment of single component gas showed that the absorption of CO2 was higher than that of CH4 by coals, finding that the adsorption capacity of CO2 by coal surface was higher than that of CH4, and the absorption capacity ratio of CO2/CH4 changed with pressure and coal rank, but the pressure was not directly proportional to absorption capacity ratio of CO2/CH4. With the increase of pressure, adsorption ratio of CO2/CH4 decreases gradually. When the pressure is high, the adsorption capacity of CH4 is higher than that of CO2, so it is appropriate to use CO2 to displace coal seam CH4 under low pressure. In addition, adsorption- desorption characteristic curve obtained from pure gas and carbon dioxide adsorption isotherm experiment could not demonstrate true adsorption situation of CH4 and CO2 mixed gas in coal seam.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Pengliang Yu
AU  - Yun Cao
AU  - Xiangfang Li
PY  - 2017/02
DA  - 2017/02
TI  - Competitive adsorption of methane and carbon dioxide at nanometer level
BT  - Proceedings of the 2016 2nd International Conference on Materials Engineering and Information Technology Applications (MEITA 2016)
PB  - Atlantis Press
SP  - 160
EP  - 164
SN  - 2352-5401
UR  - https://doi.org/10.2991/meita-16.2017.36
DO  - 10.2991/meita-16.2017.36
ID  - Yu2017/02
ER  -