A multi-scale model for CO_(2) sequestration enhanced coalbed methane recovery

作     者：G.X.WANG X.R.WEI V.RUDOLPH C.T.WEI Y.QIN 

作者机构：School of EngineeringUniversity of QueenslandSt Lucia Qld 4072Australia School of Resources and GeoscienceChina University of Mining&TechnologyXuzhou 221008China 

出 版 物：《Frontiers of Chemical Science and Engineering》 (化学科学与工程前沿（英文版）)

年 卷 期：2009年第3卷第1期

页      面：20-25页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：the Australian Research Council(ARC)and Australia-China Special Fund for Scientific&Technological Cooperation for financial support 

主　　题：multi-scale model gas transport coal coalbed methane CO_(2)sequestration 

摘      要：This paper presents a multi-scale model to simulate the multicomponent gas diffusion andflow in bulk coals for CO_(2) sequestration enhanced coalbed methane *** model is developed based on a bi-dispersed structure model by assuming that coal con-sists of microporous micro-particles,meso/macro-pores and open *** bi-disperse diffusion theory and the Maxwell-Stefan approach were incorporated in the model,providing an improved simulation of the CH4-CO_(2)/CH4-N2 counter diffusion *** the model,the counter diffusion process is numerically coupled with theflow of the mixture gases occurring within macro-pores or fractures in coal so as to account for the interaction between diffusion andflow in gas transport through *** model was validated by both experimental data from literature and our CO_(2)flush tests,and shows an excellent agreement with the *** results reveal that the gas diffusivities,in particular the micro-pore diffusivities are strongly concentration-dependent.