title: Methane storage in nanoporous material at supercritical temperature over a wide range of pressures.
abstract: The methane storage behavior in nanoporous material is significantly different from that of a bulk phase, and has a fundamental role in methane extraction from shale and its storage for vehicular applications. Here we show that the behavior and mechanisms of the methane storage are mainly dominated by the ratio of the interaction between methane molecules and nanopores walls to the methane intermolecular interaction, and a geometric constraint. By linking the macroscopic properties of the methane storage to the microscopic properties of a system of methane molecules-nanopores walls, we develop an equation of state for methane at supercritical temperature over a wide range of pressures. Molecular dynamic simulation data demonstrates that this equation is able to relate very well the methane storage behavior with each of the key physical parameters, including a pore size and shape and wall chemistry and roughness. Moreover, this equation only requires one fitted parameter, and is simple, reliable and powerful in application.
authors.affiliation: The Department of Chemical and Petroleum Engineering, University of Calgary, Alberta T2N1N4, Canada.
authors.forename: Keliu
authors.initials: K
authors.lastname: Wu
authors.affiliation: The Department of Chemical and Petroleum Engineering, University of Calgary, Alberta T2N1N4, Canada.
authors.forename: Zhangxin
authors.initials: Z
authors.lastname: Chen
authors.affiliation: Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum, Beijing 102249, China.
authors.forename: Xiangfang
authors.initials: X
authors.lastname: Li
authors.affiliation: The Department of Chemical and Petroleum Engineering, University of Calgary, Alberta T2N1N4, Canada.|Key Laboratory for Petroleum Engineering of the Ministry of Education, China University of Petroleum, Beijing 102249, China.
authors.forename: Xiaohu
authors.initials: X
authors.lastname: Dong