35Component fractionation of temporal evolution in adsorption–desorption.pdf

International Journal of Mining Science and Technology 23 (2013) 201–205 Contents lists available at SciVerse ScienceDirect International Journal of Mining Science and Technology journal homepage: www.else /locate/ijmst Component fractionation of temporal evolution in adsorption–desorption for binary gas mixtures on coals from Haishiwan Coal Mine Wang Liguo a,b, Cheng Yuanping a,b, Li Wei a,b,c,⇑, Lu Shouqing a,b, Xu Chao a,b a National Engineering Research Center for Coal Gas Control, Xuzhou 221116, China b School of Safety Engineering, China University of Mining Technology, Xuzhou 221116, China c Key Laboratory of Coal-Based CO2 Capture and Geological Storage, Xuzhou 221116, China a r t i c l e i n f o a b s t r a c t Article history: Adsorption–desorption experiments on CO –CH gas mixtures with varying compositions have been con- 2 4 Received 19 July 2012 ducted to study the fractionation characteristics of CO2–CH4 on Haishiwan coal samples. These were car- Received in revised form 17 August 2012 ried out at constant temperature but different equilibrium pressure conditions. Based on these Accepted 23 September 2012 experimental results, the temporal evolution of component fractionation in the field was investigated. Available online 9 May 2013 The results show that the CO2 concentration in the adsorbed phase is always greater than that in the ori- gina