1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China
2. PetroChina Liaoyang Petrochemical Company, Liaoyang, Liaoning 111003, China
3. Refining & Petrochemical Research Institute, PetroChina Karamay Petrochemical Company Limited, Karamay 834000, China