title: Efficient Determination of Specific Surface Area of Shale Samples Using a Tracer-Based Headspace Gas Chromatographic Technique.
abstract: This paper reports on a novel method for determining the specific surface area (SSA) of shale via headspace gas chromatography (HS-GC). The method is based on the water adsorption on the surface of shale sample after achieving phase equilibrium at an elevated temperature (i.e., heating at 125 °C for 48 h). A mathematical model shows that the SSA can be determined from the signal of the vapor water released during HS-GC analysis. The results obtained by this method correlated well (R2= 0.992) with data obtained by the reference BET method. Because the phase equilibrium step for multiple samples can be conducted simultaneously, and because the phase re-equilibrium step is much faster in the HS-GC measurement, the present method is more efficient for batch sample testing.
authors.forename: Liang
authors.initials: L
authors.lastname: He
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences , Guangzhou, China.
authors.forename: Teng-Fei
authors.initials: TF
authors.lastname: Li
authors.forename: Xin-Sheng
authors.identifier: 0000-0001-7274-4795
authors.initials: XS
authors.lastname: Chai
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences , Guangzhou, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Tian
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences , Guangzhou, China.
authors.forename: Xian-Ming
authors.initials: XM
authors.lastname: Xiao
authors.forename: Donald G
authors.initials: DG
authors.lastname: Barnes