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논문 기본 정보

자료유형
학술저널
저자정보
Hongjie Xu (Anhui University of Science and Technology China) Shuxun Sang (China University of Mining and Technology Xuzhou) Jingfen Yang (Anhui University of Science and Technology China) Huihu Liu (Anhui University of Science and Technology China)
저널정보
한국지질과학협의회 Geosciences Journal Geosciences Journal Vol.25 No.5
발행연도
2021.10
수록면
715 - 729 (15page)
DOI
10.1007/s12303-020-0058-z

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The storage of CO2 in deep unminable coal seams can mitigate greenhouse gas emissions. However, CO2 storage in deep anthracite coal is complex with some uncertainties in the estimation of CO2 storage capacity. Based on isothermal adsorption experiments and gas solubility experiments under high temperature and pressure conditions, the total storage capacity of CO2 in anthracite coal is discussed. The results show that the absolute adsorption amount is over 44 cm3/g at temperatures of 318.15, 335.65, and 353.15 K as well as adsorption equilibrium pressures of 10 MPa. The storage capacity of adsorbed and free gas is 35?70 cm3/g and 5?8 cm3/g, respectively, within a depth range of 1000?2000 m. The soluble gas can be ignored for its low content between 0.22 cm3/g and 0.28 cm3/g with a proportion of less than 1%. The storage capacity of CO2 may be estimated inaccurately because of the heterogeneity and uncertainty of the macroscopic geological conditions and coal reservoir parameters. Taking the No. 3 coal seam in Zhengzhuang block as an example, the storage priority area was divided into supercritical area and subcritical area with five sub-areas according to storage conditions, and the storage capacity was calculated, showing a relatively good storage potential.

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