Modeling Gas Adsorption–Desorption Hysteresis in Energetically Heterogeneous Coal and Shale
نویسندگان
چکیده
Adsorption of gases in porous adsorbents such as coal and shale generally exhibits the phenomenon hysteresis. Most previous studies on desorption hysteresis were conducted via experimental tests. However, few theoretical models that represent adsorption–desorption sorbents are available. To address this issue, work develops a new model for describing adsorption isotherms with Particularly, energetically heterogeneous surfaces an adsorbent considered patchwise model. Based change site energy distribution, logarithmically pressure-dependent index, which is used to measure degree hysteresis, derived quantitative assessment Besides, correlation between isotherm initialized pressure established. The accuracy proposed adequately describe gas demonstrated by validating against laboratory experiments obtained from literature. results indicate depends significantly distribution. By comparing distributions isotherms, it found can be attributed pore size distribution caused adsorption-induced deformation. analyses support effective tool quantitatively predict amount released during desorption, significant designing coalbed methane or production assessing long-term CO2 storage behavior.
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ژورنال
عنوان ژورنال: Energy & Fuels
سال: 2023
ISSN: ['1520-5029', '0887-0624']
DOI: https://doi.org/10.1021/acs.energyfuels.2c03441