Influence of temperature on the replacement of CH4 by supercritical CO2

  • FAN Jingjing ,
  • WANG Yanbin ,
  • WANG Jin
  • College of Geoscience and Surveying Engineering, China University of Mining & Technology, Beijing 100083, China

Received date: 2015-08-16

  Revised date: 2015-11-02

  Online published: 2016-01-07


An experiment for replacement of CH4 by CO2 was conducted under different temperatures (35, 45, and 55℃) and the same injection pressure (12.7 MPa) using ISO-300 isothermal adsorption experiment instrument for studying the influence of temperature on the replacement of CH4 by supercritical CO2. Coal samples of Tunliu mine were used as the research subjects. The results show that during the replacement and desorption process, the adsorbed phase concentration of supercritical CO2 increased with increase of the temperature and decrease of the pressure, while the concentration variation of CH4 was in an opposite way. Under supercritical conditions, laboratory measurement of the adsorption capacity is the adsorption of Gibbs. The relationship between real adsorption capacity and pressure accords with the Langmuir adsorption curve. With increasing pressure, the difference between calculated and Gibbs adsorption capacity increased. The CH4 desorption rate at unit pressure drop reached the highest at the temperature of 35℃ under the experiment pressure drop, and when the temperature was close to the supercritical temperature, the replacement effect of supercritical CO2 reached the best.

Cite this article

FAN Jingjing , WANG Yanbin , WANG Jin . Influence of temperature on the replacement of CH4 by supercritical CO2[J]. Science & Technology Review, 2015 , 33(24) : 28 -33 . DOI: 10.3981/j.issn.1000-7857.2015.24.005


[1] Busch A, Gensterblum Y, Kross B M, et al. Methane and carbon diox-ide adsorption diffusion experiments on coal: Upscaling and modeling[J]. International Journal of Coal Geology, 2004, 60(2): 151-168.
[2] Stantion R, Flores R, Warwick D, et al. Coal bed sequestration of car-bon dioxide[C]//The First National Conference on Carbon Sequestration. Washington, USA, 2001: 14-17.
[3] White M, Smith H D, Jones L K, et al. Sequestration of carbon dioxide in coal with enhanced coal bed methane recovery: A review[M]. Wash-ington: American Chemical Society, 2005.
[4] 唐书恒, 韩德馨. 煤对多元气体的吸附与解吸[J]. 煤炭科学技术, 2002, 30(2): 58-60. Tang Shuheng, Han Dexin. Adsorption and desorption of mulit element gas by coal[J]. Coal Science and Technology, 2002, 30(2): 58-60.
[5] Clarkson C R,Bustin R M. Binary gas adsorption/desorption isotherms: effect of moisture and coal composition upon carbon dioxide selectivity over methane[J]. International Journal of Coal Geology, 2000, 42(4): 241-272.
[6] Hall F E, Zhou C H, Gasem K A M, et al. Adsorption of pure methane, nitrogen, and carbon dioxide and their binary mixtures on wet Fruitland coal[C]//SPE Eastern Regional Meeting. Charleston, USA, November 8-10, 1994.
[7] 叶建平, 冯三利, 范志强, 等. 沁水盆地南部注二氧化碳提高煤层气采 收率微型先导性试验研究[J]. 石油学报, 2007, 28(4): 77-80. Ye Jianping, Feng Sanli, Fan Zhiqiang, et al. Micro pilot test for en-hanced coalbed methane recovery by injecting carbon dioxide in south part of Qinshui Basin[J]. Acta Petrolei Sinica, 2007, 28(4): 77-80.
[8] 徐春光, 王延斌, 王向浩, 等. 深部煤层CO2置换CH4过程中煤岩特性 变化研究[J]. 河南理工大学学报: 自然科学版, 2013, 32(3): 265-269. Xu Chunguang, Wang Yanbin, Wang Xianghao, et al. Research prog-ress of coal rock properties change in the process of CO2 replacement CH4 in deep coal seam[J]. Journal of Henan Polytechnic University: Nat-ural Science, 2013, 32(2): 265-269.
[9] 韩俊杰, 梁卫国, 张建功, 等. 煤层处置二氧化碳模拟实验研究[J]. 煤 炭学报, 2014, 39(3): 531-536. Han Junjie,Liang Weiguo,Zhang Jiangong,et al. Simulation experiment of carbon dioxide storage in coal seam[J]. Journal of China Coal Soci-ety, 2014, 39(3): 531-536.
[10] 唐书恒, 马彩霞, 叶建平, 等. 注CO2提高煤层甲烷采收率的试验模 拟[J]. 中国矿业大学学报, 2006, 35(5): 607-611. Tang Shuheng, Ma Caixia, Ye Jianping, et al. A modeling experiment of enhancing coalbed methane recovery by carbon dioxide injection[J]. Journal of China University of Mining and Technology, 2006, 35(5): 607-611.
[11] Liang W, Zhao Y, Wu D, et al. Experiments on methane displacement by carbon dioxide in large coal specimens[J]. Rock Mechanics and Rock Engineering, 2011, 44(5): 579-589.
[12] 高莎莎, 王延斌, 贾立龙, 等. 温度及压力对CO2置换CH4的影响[J]. 中国矿业大学学报, 2013, 42(5): 801-805. Gao Shasha, Wang Yanbin, Jia Lilong, et al. Influence of temperature and pressure on the replacement of CH4 with CO2[J]. Journal of China University of Mining & Technology, 2013, 42(5): 801-805.
[13] Dutka B, Kudasik M, Topolnicki J. Pore pressure changes accompany-ing exchange sorption of CO2/CH4 in a coal briquette[J]. Fuel Process-ing Technology, 2012, 100(4): 30-34.
[14] Mazumder S, Wolf K H A A, Hemert P V, et al. Laboratory experi-ments on environmental friendly means to improve coalbed methane production by carbon dioxide/flue gas injection[J]. Transport in Porous Media, 2008, 75(1): 63-92.
[15] Nikolai S, Andreas B. Measurement and interpertation of supercritical CO2 sorption on various coals[J]. International Journal of Coal Geology, 2007, 69(4): 229-242.
[16] Li Quanzhong, Ni Xiaoming, Wang Yanbin, et al. The experimental study on the adsorption/desorption of carbon dioxide in the coal under supercritial condition[J]. Coal Geology & Exploration, 2014, 42(3): 36-39.
[17] Yang T, Nic B, Yang D, et al. Experimental research on displacing coal bed methane with supercritical CO2[J]. Safety Science, 2012, 50 (4): 899-902.
[18] 梁卫国, 张倍宁, 韩俊杰, 等.超临界CO2驱替煤层CH4装置及试验 研究[J]. 煤炭学报, 2014, 39(8): 1511-1520. Liang Weiguo, Zhang Beining, Han Junjie, et al. Experimental study on coal bed methane displacement and recovery by super critical car-bon dioxide injection[J]. Journal of China Coal Society, 2014, 39(8): 1511-1520.
[19] Arri L E, Yee D, Morgan W D, et al. 煤层甲烷产量的二元气体吸附 模拟[M]. 宋党育, 译. 徐州: 中国矿业大学出版社, 1996: 130-141. Arri L E, Yee D, Morgan W D, et al. Modeling coal bed methane pro-duction with binary gas sorption[M]. Song Dangyu, trans. Xuzhou: Chi-na University of Mining and Technology Press, 1996: 130-141.
[20] 杨兆彪, 秦勇, 高弟, 等. 超临界条件下煤层甲烷视吸附量、真实吸附 量的差异及其地质意义[J]. 天然气工业, 2011, 31(4): 13-16. Yang Zhaobiao, Qin Yong, Gao Di, et al. Differences between appar-ent and true adsorption quantity of coalbed methane under supercriti-cal conditions and their geological significance[J]. Natural Gas Indus-try, 2011, 31(4): 13-16.