title: Research of CO2and N2Adsorption Behavior in K-Illite Slit Pores by GCMC Method.
abstract: Understanding the adsorption mechanisms of CO2and N2in illite, one of the main components of clay in shale, is important to improve the precision of the shale gas exploration and development. We investigated the adsorption mechanisms of CO2and N2in K-illite with varying pore sizes at the temperature of 333, 363 and 393 K over a broad range of pressures up to 30 MPa using the grand canonical Monte Carlo (GCMC) simulation method. The simulation system is proved to be reasonable and suitable through the discussion of the impact of cation dynamics and pore wall thickness. The simulation results of the excess adsorption amount, expressed per unit surface area of illite, is in general consistency with published experimental results. It is found that the sorption potential overlaps in micropores, leading to a decreasing excess adsorption amount with the increase of pore size at low pressure, and a reverse trend at high pressure. The excess adsorption amount increases with increasing pressure to a maximum and then decreases with further increase in the pressure, and the decreasing amount is found to increase with the increasing pore size. For pores with size greater larger than 2 nm, the overlap effect disappears.
authors.affiliation: Research Institute of Unconventional Petroleum and Renewable Energy (RIUP&RE), China University of Petroleum (East China), Qingdao 266580, Shandong, PR China.|School of Geosciences, China University of Petroleum (East China), Qingdao 266580, Shandong, PR China.|CSIRO Energy Flagship, 26 Dick Perry Ave, WA 6151, Australia.|Shaanxi Province key laboratory of lacustrine shale gas accumulation and development, xi'an 710000, Shaanxi, PR China.
authors.forename: Guohui
authors.initials: G
authors.lastname: Chen
authors.affiliation: Research Institute of Unconventional Petroleum and Renewable Energy (RIUP&RE), China University of Petroleum (East China), Qingdao 266580, Shandong, PR China.|School of Geosciences, China University of Petroleum (East China), Qingdao 266580, Shandong, PR China.|Shaanxi Province key laboratory of lacustrine shale gas accumulation and development, xi'an 710000, Shaanxi, PR China.
authors.forename: Shuangfang
authors.initials: S
authors.lastname: Lu
authors.affiliation: CSIRO Energy Flagship, 26 Dick Perry Ave, WA 6151, Australia.
authors.forename: Junfang
authors.initials: J
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, Shandong, PR China.|College of Science and Key Laboratory of New Energy Physics &Materials Science in Universities of Shandong, China University of Petroleum, Qingdao 266580, Shandong, PR China.
authors.forename: Qingzhong
authors.initials: Q
authors.lastname: Xue
authors.affiliation: CSIRO Energy Flagship, 26 Dick Perry Ave, WA 6151, Australia.
authors.forename: Tongcheng
authors.initials: T
authors.lastname: Han
authors.affiliation: Research Institute of Unconventional Petroleum and Renewable Energy (RIUP&RE), China University of Petroleum (East China), Qingdao 266580, Shandong, PR China.|School of Geosciences, China University of Petroleum (East China), Qingdao 266580, Shandong, PR China.|Shaanxi Province key laboratory of lacustrine shale gas accumulation and development, xi'an 710000, Shaanxi, PR China.
authors.forename: Haitao
authors.initials: H
authors.lastname: Xue
authors.affiliation: Research Institute of Unconventional Petroleum and Renewable Energy (RIUP&RE), China University of Petroleum (East China), Qingdao 266580, Shandong, PR China.|School of Geosciences, China University of Petroleum (East China), Qingdao 266580, Shandong, PR China.|Shaanxi Province key laboratory of lacustrine shale gas accumulation and development, xi'an 710000, Shaanxi, PR China.
authors.forename: Shansi
authors.initials: S
authors.lastname: Tian
authors.affiliation: Research Institute of Unconventional Petroleum and Renewable Energy (RIUP&RE), China University of Petroleum (East China), Qingdao 266580, Shandong, PR China.|School of Geosciences, China University of Petroleum (East China), Qingdao 266580, Shandong, PR China.|Shaanxi Province key laboratory of lacustrine shale gas accumulation and development, xi'an 710000, Shaanxi, PR China.
authors.forename: Jinbu
authors.initials: J
authors.lastname: Li
authors.affiliation: Research Institute of Unconventional Petroleum and Renewable Energy (RIUP&RE), China University of Petroleum (East China), Qingdao 266580, Shandong, PR China.|School of Geosciences, China University of Petroleum (East China), Qingdao 266580, Shandong, PR China.|Shaanxi Province key laboratory of lacustrine shale gas accumulation and development, xi'an 710000, Shaanxi, PR China.
authors.forename: Chenxi
authors.initials: C
authors.lastname: Xu
authors.affiliation: CSIRO Energy Flagship, 26 Dick Perry Ave, WA 6151, Australia.
authors.forename: Marina
authors.initials: M
authors.lastname: Pervukhina
authors.affiliation: CSIRO Energy Flagship, 26 Dick Perry Ave, WA 6151, Australia.
authors.forename: Ben
authors.initials: B
authors.lastname: Clennell