1. College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao, Shandong 266580, China
2. Key Laboratory of Petrochemical Catalytic Science and Technology, Liaoning Province, Liaoning Petrochemical University, Fushun, Liaoning 113001, China
3. Lanzhou Petrochemical Research Center, Petrochemical Research Institute, Petrochina, Lanzhou 730060, China