文献类型：期刊文献

英文题名：Influence of alkaline solution injection for wettability and permeability of coal with CO2 injection

作者：Zhou, Yinbo[1,2];Zhang, Ruilin[1];Huang, Jilei[3];Li, Zenghua[4];Chen, Zhao[1];Zhao, Zhou[1];Hong, Yidu[5]

第一作者：Zhou, Yinbo

通讯作者：Zhou, YB[1]

机构：[1]Henan Univ Engn, Sch Safety Engn, Zhengzhou 451191, Peoples R China;[2]Henan Polytech Univ, State Key Lab Cultivat Base Gas Geol & Gas Contro, Jiaozuo 454150, Henan, Peoples R China;[3]Henan Univ Econ & Law, Coll Resources & Environm, Zhengzhou 450046, Peoples R China;[4]China Univ Min & Technol, Minist Educ, Key Lab Gas & Fire Control Coal Mines, Xuzhou 221008, Jiangsu, Peoples R China;[5]Chinese Acad Sci, Haixi Inst, Quanzhou Inst Equipment Mfg, Quanzhou 362000, Fujian, Peoples R China

第一机构：Henan Univ Engn, Sch Safety Engn, Zhengzhou 451191, Peoples R China

通讯机构：[1]corresponding author), Henan Univ Engn, Sch Safety Engn, Zhengzhou 451191, Peoples R China.

年份：2020

卷号：202

外文期刊名：ENERGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000538592700102)】；

基金：The authors are grateful to the National Natural Science Foundation of China (NO. 51804098), Key Scientific Research Project of Colleges and Universities in Henan Province (NO. 19A440001, NO.19B440001), and National Training Program of Innovation and Entrepreneurship for Undergraduates (S201911517006). Supported by the State Key Laboratory Cultivation Base for Gas Geology and Gas Control (Henan Polytechnic University), (NO. WS2019B07).

语种：英文

外文关键词：Alkaline solution; Coalbed methane; CO2 injection; Coal permeability; Wettability

摘要：The technology for combining CO2 injection with alkaline solution injection into coal bodies is proposed and investigated to address the disadvantages of traditional CO2 injection technologies, such as the production of dangerous amounts of excess residual gas and prevention of water injection into the deeper coal seams. After the CO2 injection, the wettability of coal sample is greatly improved, especially the alkaline solution. CO2 injection can effectively displace methane in coal, while alkaline solution can dissolve CO2 molecules adsorbed in coal and improve the wetting effect of coal. The increase of moisture will lead to the decrease of coal permeability, which can reduce gas emission. The permeability loss ratios for coal samples injected with CO2 were more than 90% much higher than those for coal samples not injected with CO2. After alkaline injection, the moisture content of coal into which CO2 had been injected increased 6.13 times compared to raw coal. Therefore, this technology may consume excess CO2 gas from the coal body and improve the effect of water injection into deeper coal seams. (C) 2020 Elsevier Ltd. All rights reserved.