1. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, P. R. China
2. Key Laboratory of Gas Hydrate, Chinese Academy of Sciences, Guangzhou 510640, P. R. China
3. Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, P. R. China
4. Center for Energy Resources Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Lyngby 2800 Kgs., Denmark
5. College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, P. R. China