1. The State Key Lab of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum-East China, Qingdao, Shandong 266580, P. R China
2. Qingdao Haiwan Technology Industry Research Institute Co., Ltd., Qingdao Haiwan Group Co., Ltd., Qingdao, Shandong 266061, P. R China
3. College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, P. R China