Incipient Hydrate Formation Pressure-Temperature and Equilibrium Composition for CH4-N2-O2-THF-H2O System


Article Preview

The new method for separating drained coal bed methane (CBM) is based on gas hydrate formation. The thermodynamic parameters of incipient hydrate formation for the CH4-N2-O2-THF-H2O system were carefully determined. After establishing equilibrium state of three-phase coexistence, CH4 concentrations of vapor phase and that of hydrate phase were determined by GC. The results show that the higher the THF concentration, the larger the CH4 concentration in hydrate phase and the partition coefficient. It can provide the reference for seeking the optimal promoters in the hydrate formation process for the mixed gas.



Edited by:

Aimin Yang, Jingguo Qu and Xilong Qu




X. Gao et al., "Incipient Hydrate Formation Pressure-Temperature and Equilibrium Composition for CH4-N2-O2-THF-H2O System", Applied Mechanics and Materials, Vols. 84-85, pp. 219-223, 2011

Online since:

August 2011




[1] International Energy Agency. Coal mine methane in China: A budding asset with the potential to bloom. An assessment of technology, policy and financial issues relating to CBM in China, Based on interviews conducted at coal mines in Guizhou and Sichuan Provinces. February (2009).

[2] China University of Petroleum. Feasibility study of coal bed methane production in China. A technology report for the EU-China Energy and Environment Programme funded by the European Union and the National Development and Reform Commission of China (EuropeAid/120723/D/SV/CN), March (2008).

[3] Wu Jianfeng, Sun Zhaohu , Gong Maoqiong: Natur Gas Ind. 29(2), (2009), 113-116.

[4] Baoyong Zhang, Qiang Wu: Energy Fuels, 24(4), (2010), 2530-2535.

[5] Qiang Wu, Baoyong Zhang: CIESC Journl, 57(12), (2006), 2793-2797.

[6] Baoyong Zhang, Qiang Wu: Journal of China University of Mining&Technology, 36(4), (2007), 487-491.

[7] B.Y. Zhang, Q. Wu, Y.M. Zhu, J. China Univ. Mining & Technol. 37(2009) 203-208.

[8] Qiang Wu, Baoyong Zhang: CIESC Journal, 60(5), (2009), 1193-1198.

[9] M.V. Stackelberg, H.R. Muller. Z. Elektrochem. 1954, 58, 25.

[10] E.D. Sloan,; C. A. Koh. Clathrate Hydrate of Natural Gases. New York: Taylor & Francis Group LLC (2008).

[11] L. Pauling, R.E. Marsh, PNAS 38(1952) 112-118.