文献类型：期刊文献

英文题名：Effect of competitive adsorption on the deformation behavior of nanoslit-confined carbon dioxide and methane mixtures

作者：Wu, Hongguan[1,2];Jin, Zhehui[3];Xu, Xiaofei[1,2];Zhao, Shuangliang[1,2,4,5];Liu, Honglai[6]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[3]Univ Alberta, Sch Min & Petr Engn, Dept Civil & Environm Engn, Edmonton, AB T6G1H9, Canada;[4]Guangxi Univ, Guangxi Key Lab Petrochem Resource Proc & Proc In, Nanning 530004, Peoples R China;[5]Guangxi Univ, Sch Chem & Chem Engn, Nanning 530004, Peoples R China;[6]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：431

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20215011309722);WOS:【SCI-EXPANDED(收录号:WOS:000790088000002)】；

基金：Acknowledgments This work is supported by the National Natural Science Foundation of China (Nos. 91934302 and 21978079) . H.W. is grateful to the China Scholarship Council for supporting his visit to the Rutgers University and to Professor Neimark for his advice on the initial stage of this project.

语种：英文

外文关键词：CO2 sequestration; Adsorption deformation; CH4 recovery; Nanoslit-confined mixture; Classical density functional theory

摘要：Understanding the behaviors of nanoslit-confined carbon dioxide and methane mixtures is of great importance in geological storage of carbon dioxide (CO2) and extraction of methane (CH4) from shale/coalbeds. Herein, the effects of pore width, bulk mixture composition, and geographic depth on the mixture adsorption and pore deformation tendency are studied by using the classical density functional theory. The solvation pressure against pore width shows an oscillating distribution, indicating a deformation transition from expansion to contraction in nanopores. A high recovery ratio of CH4 can be found in small pores at low temperatures and under high bulk pressure. For the 0.68 nm pore, a remarkably high optimal recovery ratio is identified at the geographic depth of about 0.2 km, while for the pores with pore width of 0.9-1.2 nm a modest optimal recovery ratio locates at the depth of about 0.5-1.0 km. This work provides a thorough understanding of the adsorption and deformation behavior of slit-confined mixtures.