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Development potential evaluation of CO 2 ‐ECBM in abandoned coal mines
Author(s) -
Ge Zhaolong,
Deng Kai,
Zhang Liang,
Zuo Shaojie
Publication year - 2020
Publication title -
greenhouse gases: science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.45
H-Index - 32
ISSN - 2152-3878
DOI - 10.1002/ghg.1986
Subject(s) - coal mining , coal , coalbed methane , greenhouse gas , environmental science , mining engineering , waste management , china , engineering , geology , geography , oceanography , archaeology
Environmental problems such as the greenhouse effect have forced countries to consciously reduce the use of coal, and many coal mines have been forced to close. However, most of the abandoned coal mines have not been redeveloped or utilized, resulting in a huge waste and idleness of resources. Abandoned coal mines may also cause subsequent safety, environmental, and social problems. In particular, China has closed a large number of coal mines in recent years, and most of these mines are high‐gas mines. Furthermore, CO 2 emissions are still increasing as the global primary energy consumption continues to grow. Because abandoned coal mines are no longer mined, this study proposes the application of CO 2 ‐enhanced coalbed methane drainage technology (CO 2 ‐ECBM) to abandoned coal mines in China for coalbed methane (CBM) extraction and simultaneous CO 2 storage. China is the largest coal consumer and CO 2 emitter, and the potential capacities for both methane extraction and CO 2 storage in China's abandoned mines are evaluated in this paper. This work analyzes the characteristics and development status of abandoned coal resources in China. Then, the amount of CBM and coal resources in the closed coal mines in Chongqing since 2015 is counted, and the CBM production, CO 2 storage, and production costs and profits required for CO 2 ‐ECBM technology are calculated. Finally, taking the Chongqing area as an example, the CBM production and CO 2 storage potential of abandoned coal mines in China are estimated. The purpose of this paper is to discuss the potential and economics of using CO 2 ‐ECBM technology in abandoned coal mines. The results provide a reference for the development of abandoned CBM and CO 2 underground storage. © 2020 Society of Chemical Industry and John Wiley & Sons, Ltd.