Petroleum Science >2023,??Issue1:??- DOI: https://doi.org/10.1016/j.petsci.2022.08.017
Adsorption of methane onto mudstones under supercritical conditions: Mechanisms, physical properties and thermodynamic parameters Open?Access
文章信息
作者：Yang Wang, Hong-Fei Cheng, Qin-Hong Hu, Lang-Bo Jia, Xi-Meng Wang, Sha-Sha Gao, Luo-Fu Liu
作者單位：
投稿時間：
引用方式：Yang Wang, Hong-Fei Cheng, Qin-Hong Hu, Lang-Bo Jia, Xi-Meng Wang, Sha-Sha Gao, Luo-Fu Liu, Adsorption of methane onto mudstones under supercritical conditions: Mechanisms, physical properties and thermodynamic parameters, Petroleum Science, Volume 20, Issue 1, 2023, Pages 34-47, https://doi.org/10.1016/j.petsci.2022.08.017.
文章摘要
Abstract: Since the mechanisms of methane-mudstone interactions are important for estimating shale gas reserves, methane adsorption under supercritical conditions of 30?MPa pressure and 303.15, 333.15, 363.15?K temperatures was studied to measure the excess methane adsorption in two mudstone samples from Yanchang Formation, Ordos Basin. Excess adsorption features inflection points where the amount of adsorbed gas changes from increasing to decreasing concentrations. Three methods (fixed, slope, and freely fitted density) were applied to calculate the adsorbed-phase density (ρad), which was then used to fit the measured excess adsorption. Two criteria, the goodness-of-fit and whether the fitting can obtain reasonable absolute adsorption, were applied to determine the most accurate model. Results indicated that the supercritical Dubinin-Radushkevich (SDR) model with freely fitted ρad was the most reasonable model. The volume of adsorbed methane at 363.15?K is close to the micropore (d?
關鍵詞
-
Keywords: Supercritical methane adsorption; Excess adsorption; Adsorbed-phase density; Adsorption model; Thermodynamic feature