1. Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, MOE Key Laboratory of Petroleum Engineering, State Key Laboratory of Natural Gas Hydrates, China University of Petroleum, Beijing. No. 18 Fuxue Road, Changping District, 102249 Beijing, P. R. China
2. School of Petrochemical Engineering, Lanzhou University of Technology, No. 287, Langongping Road, Qilihe District, Lanzhou, Gansu 730050, P. R. China