Experimental Investigation of Storage Space and Adsorption Capacity Variation of Shale under Different Reaction Times in Supercritical CO2

Dai, Xiaogan; Wei, Chongtao; Wang, Meng; Shi, Xuan; Wang, Xiaoqi; Vandeginste, Veerle

doi:10.1007/s11053-023-10239-8

Cited by 2 publications

(1 citation statement)

References 58 publications

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“…The gas components of coal seams are roughly divisible into hydrocarbons and nonhydrocarbons . The hydrocarbons (mainly CH 4 and a certain amount of heavy hydrocarbon gas) dominate, while nonhydrocarbon gases (such as CO 2 and N 2 ) exist in small amounts. − According to recent research based on industrial tests for measuring the gas contents of coal seams, the proportion of heavy hydrocarbon gas reaches 5–25% in some mining areas. The characteristics and causes of heavy hydrocarbon gas have been extensively researched.…”

Section: Introductionmentioning

confidence: 99%

Desorption Characteristics of CH₄–C₂H₆ Mixed Gas in Heavy Hydrocarbon-Rich Coal Seams

Liang,

Shi,

Yue

et al. 2024

ACS Omega

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The gas desorption characteristics of coal are closely related to the gas content of the coal seam. The gas in heavy hydrocarbon-rich coal seams contains CH 4 and C 2 H 6 heavy hydrocarbons. However, most current research on the gas desorption characteristics of coal seams focuses on CH 4 analysis, ignoring the influence of the C 2 H 6 heavy hydrocarbon gas. To accurately determine the gas content of a heavy hydrocarbon-rich coal seam, methods based on CH 4 analysis are inadequate and the desorption characteristics of CH 4 −C 2 H 6 mixed gas must be clarified. This work experimentally and theoretically studies the desorption characteristics of single-component gas and CH 4 −C 2 H 6 mixed gas from coal samples. The results show that increasing the adsorption-equilibrium pressure was found to increase the desorption quantity and desorption speed of single-component gas and increase the desorption quantity, desorption ratio, and diffusion coefficient of mixed gas. Under the same adsorption-equilibrium pressure, the desorption quantity and rate of single-component CH 4 gas exceeded those of C 2 H 6 . The quantity and speed of mixed gas desorption increased with rising CH 4 concentration and decreased with rising C 2 H 6 concentration. The change in the mixed gas concentration during desorption reflects the distribution characteristics of light hydrocarbon components on the outer surface and heavy hydrocarbon components on the inner surface of coal. From the desorption characteristics of mixed gas, desorption models of mixed gas were obtained at different concentrations, laying a theoretical foundation for accurate determinations of gas contents in heavy hydrocarbon-rich coal seams.

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Section: Introductionmentioning

confidence: 99%

Desorption Characteristics of CH₄–C₂H₆ Mixed Gas in Heavy Hydrocarbon-Rich Coal Seams

Liang,

Shi,

Yue

et al. 2024

ACS Omega

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Nanopore Heterogeneity and Accessibility in Oil and Gas Bearing Cretaceous KG (Raghampuram) Shale, KG Basin, India: An Advanced Multi-analytical Study

Bal,

Misra,

Sen

2024

Nat Resour Res

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Experimental Investigation of Storage Space and Adsorption Capacity Variation of Shale under Different Reaction Times in Supercritical CO2

Cited by 2 publications

References 58 publications

Desorption Characteristics of CH₄–C₂H₆ Mixed Gas in Heavy Hydrocarbon-Rich Coal Seams

Desorption Characteristics of CH₄–C₂H₆ Mixed Gas in Heavy Hydrocarbon-Rich Coal Seams

Nanopore Heterogeneity and Accessibility in Oil and Gas Bearing Cretaceous KG (Raghampuram) Shale, KG Basin, India: An Advanced Multi-analytical Study

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Experimental Investigation of Storage Space and Adsorption Capacity Variation of Shale under Different Reaction Times in Supercritical CO2

Cited by 2 publications

References 58 publications

Desorption Characteristics of CH4–C2H6 Mixed Gas in Heavy Hydrocarbon-Rich Coal Seams

Desorption Characteristics of CH4–C2H6 Mixed Gas in Heavy Hydrocarbon-Rich Coal Seams

Nanopore Heterogeneity and Accessibility in Oil and Gas Bearing Cretaceous KG (Raghampuram) Shale, KG Basin, India: An Advanced Multi-analytical Study

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Desorption Characteristics of CH₄–C₂H₆ Mixed Gas in Heavy Hydrocarbon-Rich Coal Seams

Desorption Characteristics of CH₄–C₂H₆ Mixed Gas in Heavy Hydrocarbon-Rich Coal Seams