Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (06): 1305-1311.doi: 10.3866/PKU.WHXB20110635

• THERMODYNAMICS, KINETICS, AND STRUCTURAL CHEMISTRY • Previous Articles     Next Articles

Memory Effects of Structure I and II Gas Hydrates

LIU Yu, ZHAO Jia-Fei, GUO Chang-Song, SONG Yong-Chen, LIU Wei-Guo, CHENG Chuan-Xiao, YE Chen-Cheng, XUE Kai-Hua   

  1. Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education, Dalian University of Technology, Dalian 116023, Liaoning Province, P. R. China
  • Received:2011-03-03 Revised:2011-03-28 Published:2011-05-31
  • Contact: SONG Yong-Cheng E-mail:powere@dlut.edu.cn
  • Supported by:

    The project was supported by the Key Program of National Natural Science Foundation of China (50736001), National Natural Science Foundation of China (51006017), National High Technology Research and Development Program of China (863) (2006AA09209-5), National Key Basic Research Program of China (973) (2009CB219507).

Abstract:

We studied the reformation processes for structure I (sI) (methane, carbon dioxide) and structure II (sII) (propane) gas hydrates experimentally and investigated the memory effects between sI and sII hydrates using a constant-volume system. During these experiments, the induction period for hydrate formation was observed. Moreover, we also found that there were obvious memory effects in secondary formation of sI gas hydrates as well as in alternate secondary formation of sI and sII gas hydrates.

Key words: Induction time, Reformation, Memory effect, Porous media, Gas hydrate

MSC2000: 

  • O642