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Updated: Sep 23, 2025

Experimental Study of the Relationship Between Particle Size and Methane Sorption Capacity in Shale
Published on: August 2, 2018
Determination of the absolute CH4 adsorption using simplified local density theory and comparison with the modified
Yeyu Zhang1,2,3, Shaonan Zhang4, Zhicheng Wang2,3
1College of Energy Resources, Chengdu University of Technology Chengdu 610059 China denghucheng@cdut.edu.cn +86 13402851216.
Abstract:
Accurately determining the adsorbed amount of CH4 on shale is significant for understanding the mechanisms of shale gas storage and shale methane recovery from shale gas reservoirs. Excess CH4 adsorption is measured using the thermogravimetric method. Simplified local density (SLD) theory is applied to calculate the adsorbed CH4 density to obtain the absolute adsorption. Moreover, the modified Langmuir adsorption model is employed to fit the excess adsorption to describe the absolute adsorption. The adsorbed CH4 density from the SLD model is affected by the system pressure and temperature, while such density obtained from the modified Langmuir model is only a function of temperature. Compared to the modified Langmuir model, the SLD model can better capture the adsorbed CH4 density, which allows accurate determination of the absolute CH4 adsorption.
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