Citation

Jiang Y, Bai G, Zhou X, Wang S, Wang L, Fan C. China Saf. Sci. J. 2022; 32(4): 113-121.

Copyright

(Copyright © 2022, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2022.04.017

PMID

unavailable

Abstract

In order to study influence of multi⁃factor coupling on CH4 production and CO2 sequestration effect in the process of CH4 displacement by CO2, displacement experiment was carried out under conditions of different gas injection temperature (θ), pressure (P) and water content of coal samples (W). Variation characteristics of CH4 output rate (η) and CO2 storage rate (ξ) under different conditions were researched and analyzed. Then, η and ξ quadratic regression response surface models were built based on response surface methodology, separate influence of gas injection temperature (A), gas injection pressure (Ｂ) and moisture content (C) on η and ξ and interaction between each factor were investigated. The results show that η increases along with increase of θ and P, while decreases with that of W. ξ increases with increase of P, while decreases with that of θ and W. Among all influencing factors, A, Ｂ, and C are significant terms of η, Ｂ and C are those of ξ, and influence degree of primary term on η and ξ is C>Ｂ>A. That of interaction term on η is: ＢC>AC>AＢ, and the interaction between AC and ＢC is significant, while AＢ interaction is not. Influence degree of interaction term on ξ is AＢ>AC>ＢC, and interaction between AＢ and AC is extremely significant, while that between ＢC is not. The average deviations between experimental values outside coding interval of η and ξ of the 4 groups and predicted values of the model are 3. 64% and 2. 605%, respectively. © 2020 China Safety Science Journal. All rights reserved.

Language: zh