A MULTI-STEP DISSOCIATION METHOD FOR CH4 STABILITY STUDY IN NABR, KBR SOLUTIONS

MA Yan; LIU Changling; YE Yuguang; YAO De; SUN Shicai; XING Fengkui

2011 Vol. 27, No. 6

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Article navigation > Marine Geology Frontiers > 2011 > 27(6): 44-48

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MA Yan, LIU Changling, YE Yuguang, YAO De, SUN Shicai, XING Fengkui. A MULTI-STEP DISSOCIATION METHOD FOR CH4 STABILITY STUDY IN NABR, KBR SOLUTIONS[J]. Marine Geology Frontiers, 2011, 27(6): 44-48.

Citation:

MA Yan, LIU Changling, YE Yuguang, YAO De, SUN Shicai, XING Fengkui. A MULTI-STEP DISSOCIATION METHOD FOR CH4 STABILITY STUDY IN NABR, KBR SOLUTIONS[J]. Marine Geology Frontiers, 2011, 27(6): 44-48.

A MULTI-STEP DISSOCIATION METHOD FOR CH4 STABILITY STUDY IN NABR, KBR SOLUTIONS

1 College of Chemical Engineering, Shandong University of Technology, Zibo 255049, Shandong, China;
2 Qingdao Institute of Marine Geology, Qingdao 266071, China;
3 College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266510, China

Received Date: 10 April 2011

Abstract

Abstract

An experimental setup has been built to study the stability conditions of gas hydrate. The stability conditions of methane hydrate in solutions with different salt concentration are preliminarily investigated using multi-step dissociation method. In this paper, P-T conditions of methane hydrate have been measured in four kinds of solutions containing various concentrations of NaBr and/or KBr. The results show that the influence of Na+ ion under certain P-T conditions is stronger than K+ ion under same concentration. In the NaBr and KBr solutions with concentrations of 0.2mol/L and 0.3mol/L, the equilibrium points of methane hydrate were (0.5±0.1) K and (0.2±0.1) K, and (1.0±0.1) K and (0.5±0.1) K respectively, lower than those in a pure water system.
- multi-step dissociation method /
- methane hydrate /
- NaBr /
- KBr /
- stable conditions