1. State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266555, China
2. Jiujiang Petrochemical Company, Jiujiang 332004, China
3. Shengli Oil Field, Sinopec, Dongying 257000, China
4. Institute of Daqing Petrochemical Company, Daqing 163714, China