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- W3026659664 abstract "The pore structure is an essential factor that influences the isothermal characteristics of methane adsorption of coal, and the pore structure is altered after methane adsorption. In this study, a high-rank coal sample was investigated via methane adsorption isothermal measurement, and changes in the pore structure were studied using low-pressure N 2 adsorption and low-pressure CO 2 adsorption before and after the methane adsorption. The excess adsorption capacity exhibits a rapid increase at low pressure, reaching a maximum when the test pressure is approximately 8 MPa. Following that, the excess adsorption capacity of the high-rank coal tends to decrease. After the methane adsorption, the pore volume and specific surface area of the micro-, meso-, and macropores increase as compared to those before the methane adsorption, especially for micropores with apertures greater than 0.8 nm and mesopores with apertures below 10 nm. This is mainly caused by high pressure in the methane adsorption, indicating a pressure effect on the pore structure after the methane adsorption. After the methane adsorption, the ratio of pores with various sizes in the high-rank coal is enhanced, but the connectivity for meso- and macropores presents a slight decrease." @default.
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- W3026659664 date "2020-05-18" @default.
- W3026659664 modified "2023-10-14" @default.
- W3026659664 title "Isothermal characteristics of methane adsorption and changes in the pore structure before and after methane adsorption with high-rank coal" @default.
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- W3026659664 doi "https://doi.org/10.1177/0144598720925979" @default.
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