CO2 capture from coalbed methane using membranes: a review

Na Zhang (1) , Zhen Pan (1) , Zhien Zhang (2) , Wenxiang Zhang (3) , Li Zhang (1) , Francisco M Baena-Moreno (4) , Eric Lichtfouse (5)

1 LNPU - Liaoning Shihua University
2 OSU - Ohio State University [Columbus]
3 UMac - University of Macau
4 Universidad de Sevilla = University of Seville
5 CEREGE - Centre européen de recherche et d'enseignement des géosciences de l'environnement

Coalbed methane is an abundant form of natural gas extracted from coal beds. Coalbed methane is viewed as a cleaner energy source versus petroleum and coal combustion because methane extraction, transport and use are more efficient and less polluting. However, coalbed methane contains high amounts of CO 2 that induce solidification during liquefaction. Therefore, CO 2 has to be reduced below 2% to meet the pipeline transportation standards. In addition, CO 2 capture would reduce the amount of gas emissions to the atmosphere, thus mitigating global warming. Here, we review membrane absorption, which is an advanced method for CO 2 capture from coalbed methane, by controlling the gas and liquid phases separately during the operation process. We compare CO 2 removal methods for various coalbed methane sources. Parameters influencing CO 2 removal by membrane absorption are discussed to conclude that CO 2 capture efficiency is improved by increasing the flow rate, temperature, and absorbent concentration, reducing the gas flow rate, and selecting a mixed absorbent. We also explain the principles, processes and applications of CO 2 membrane absorption.

Domaines: Géochimie

Na Zhang, Zhen Pan, Zhien Zhang, Wenxiang Zhang, Li Zhang, et al.. CO2 capture from coalbed methane using membranes: a review. Environmental Chemistry Letters, 2019, 18, pp.79 - 96. ⟨10.1007/s10311-019-00919-4⟩. ⟨hal-03139539⟩