Competitive adsorption of methane and carbon dioxide at nanometer level
- 10.2991/meita-16.2017.36How to use a DOI?
- Competitive adsorption; Methane;CO2; Nanometer level
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.
- © 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/).
Cite this article
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 -