1. Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, MOE Key Laboratory of Petroleum Engineering, National Engineering Laboratory for Pipeline Safety, China University of Petroleum, Beijing 102249, P. R. China
2. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
3. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China