title: A novel method for the determination of adsorption partition coefficients of minor gases in a shale sample by headspace gas chromatography.
abstract: A novel method has been developed for the determination of adsorption partition coefficient (Kd) of minor gases in shale. The method uses samples of two different sizes (masses) of the same material, from which the partition coefficient of the gas can be determined from two independent headspace gas chromatographic (HS-GC) measurements. The equilibrium for the model gas (ethane) was achieved in 5h at 120°C. The method also involves establishing an equation based on the Kd at higher equilibrium temperature, from which the Kd at lower temperature can be calculated. Although the HS-GC method requires some time and effort, it is simpler and quicker than the isothermal adsorption method that is in widespread use today. As a result, the method is simple and practical and can be a valuable tool for shale gas-related research and applications.
authors.affiliation: State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, China.
authors.forename: Chun-Yun
authors.initials: CY
authors.lastname: Zhang
authors.forename: Hui-Chao
authors.initials: HC
authors.lastname: Hu
authors.forename: Xin-Sheng
authors.initials: XS
authors.lastname: Chai
authors.forename: Lei
authors.initials: L
authors.lastname: Pan
authors.forename: Xian-Ming
authors.initials: XM
authors.lastname: Xiao
mesh_terms: D000327:Adsorption; D002849:Chromatography, Gas / Q000379:methods*; D004980:Ethane / Q000032:analysis / Q000737:chemistry; D008956:Models, Chemical; D059206:Natural Gas / Q000032:analysis*; D010316:Particle Size; D013696:Temperature
chemical_list: D059206:Natural Gas; D004980:Ethane
keywords: Adsorption partition coefficient; Ethane; Gas chromatography; Headspace