1. State Key Laboratory of Heavy Oil Processing College of Chemical Engineering, Institute of New Energy China University of Petroleum (East China), Qingdao 266580, P. R. China
2. ShanDong Energy Group CO..LTD., Jinan 250101, P. R. China
3. Sinopec Qingdao Refining & Chemical CO., LTD., Qingdao 266500, P. R. China