Determination of dissociation heat of hydrate by mixing calorimetry

doi:10.7523/j.issn.2095-6134.2008.6.003

›› 2008, Vol. 26 ›› Issue (6): 732-737.DOI: 10.7523/j.issn.2095-6134.2008.6.003

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Determination of dissociation heat of hydrate by mixing calorimetry

Dong Fu-Hai^{1, 2, 3, 4}, Fan Shuan-Shi², Liang De-Qing^{1, 2, 4}

1 Guangzhou Institute of Energy Conversion, Chinese Academy of Science, Guangzhou 510640, China; 2 Graduate University, Chinese Academy of Sciences, Beijing 100049,China;
3Guangzhou Center for Gas Hydrate Research, Chinese Academy of Science, Guangzhou 510640, China; 4 Key Laboratory of Renewable Energy and Gas Hydrate, Chinese Academy of Science, Guangzhou 510640, China)

Received:1900-01-01 Revised:1900-01-01 Online:2008-11-15

Abstract

Abstract:

A method based on the mixing calorimetry for determination of hydrate dissociation heat was introduced. Under the condition of atmospheric pressure, the dissociation heat of tetrahydrofuran (THF) hydrate, which was about (275.62  2.64) kJ/kg at 4.4 C of phase-transition temperature, was determined by this method. Similarly, the dissociation heat of CH3CFCl2¬ (HCFC-141b) hydrate was about (348.48  3.08) kJ/kg at the phase-transition temperature of 8.4 C. By comparison with those previous results, the maximum relative error is 2% and 6.6%, respectively. To obtain the optimal results of dissociation heat, the mass ratio between hot water and THF hydrate or HCFC-141b hydrate has been optimized as well.

Key words: mixing calorimetry；hydrate；dissociation heat

Dong Fu-Hai, Fan Shuan-Shi, Liang De-Qing. Determination of dissociation heat of hydrate by mixing calorimetry[J]. , 2008, 26(6): 732-737.

Determination of dissociation heat of hydrate by mixing calorimetry

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