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Heat-dependent properties of methane diffusion in coal: an experimental study and mechanistic analysis.
Li, Xiaowei; Zhao, Dong; Li, Xiangchun; Shi, Yaoyu; Zeng, Jianhua; Zhang, Shuhao; Zhou, Changyong; Li, Zhongbei; Chang, Haiming.
Afiliación
  • Li X; School of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing, 100083, China.
  • Zhao D; College of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan, 030024, China.
  • Li X; School of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing, 100083, China. chinalixc123@163.com.
  • Shi Y; State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, 100081, China. chinalixc123@163.com.
  • Zeng J; School of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing, 100083, China.
  • Zhang S; School of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing, 100083, China.
  • Zhou C; School of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing, 100083, China.
  • Li Z; School of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing, 100083, China.
  • Chang H; School of Civil, Environmental and Architectural Engineering, University of Wollongong, MiningWollongong, NSW, 2522, Australia.
Environ Sci Pollut Res Int ; 2024 Sep 11.
Article en En | MEDLINE | ID: mdl-39261405
ABSTRACT
Coalbed methane thermodynamic extraction, as an emerging ECBM recovery method, can effectively improve gas recovery rates. And clarifying methane diffusion and migration law in coal under thermal stimulation is crucial for the selection of its process parameters. Based on laboratory methane adsorption-release experiments, the evolution law of methane diffusion characteristics with temperature and pressure was studied, and the control mechanism of heat-dependent methane diffusion behavior was explored. The results show that both thermal stimulation and high adsorption pressure accelerated the methane diffusion rate in coal. Adsorption pressure had little effect on methane diffusion percentage, but thermal stimulation promoted a significant increase in diffusion percentage and improved the net methane yield. The influence mechanisms of adsorption pressure and thermal stimulation on methane diffusion characteristics are elucidated in relation to the amount and proportion of methane-activated molecules in the diffusion process. The constant diffusion coefficient of methane is heat-dependent, based on which a diffusion model is derived to accurately predict the methane release process in coal. Additionally, temperature has a more important effect on transient diffusion coefficient than pressure. Thermal stimulation leads to a net increase rather than a decrease in diffusion coefficient in the early diffusion stages and can also accelerate the attenuation of diffusion coefficient, with this intensifying effect becoming more pronounced at higher temperatures. The research results can provide some reference for the determination of coal seam gas content and the selection of heat injection process parameters.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Environ Sci Pollut Res Int Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Environ Sci Pollut Res Int Asunto de la revista: SAUDE AMBIENTAL / TOXICOLOGIA Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania