1. State Key Laboratory of Heavy Oil Processing, China Univ. of Petroleum, 66, Changjiang West Road, Economic & Technological Development Zone, Qingdao, Shandong Province 266580, CN, e-mail: dfq0107@126.com
2. State Key Laboratory of Heavy Oil Processing, China Univ. of Petroleum, 66, Changjiang West Road, Economic & Technological Development Zone, Qingdao, Shandong Province 266580, CN, e-mail: fanwyu@upc.edu.cn
3. State Key Laboratory of Heavy Oil Processing, China Univ. of Petroleum, 66, Changjiang West Road, Economic & Technological Development Zone, Qingdao, Shandong Province 266580, CN, e-mail: yangguoming1900@sina.com
4. State Key Laboratory of Heavy Oil Processing, China Univ. of Petroleum, 66, Changjiang West Road, Economic & Technological Development Zone, Qingdao, Shandong Province 266580, CN, e-mail: dream_room@126.com
5. State Key Laboratory of Heavy Oil Processing, China Univ. of Petroleum, 66, Changjiang West Road, Economic & Technological Development Zone, Qingdao, Shandong Province 266580, CN, e-mail: luohuidcnh@163.com
6. State Key Laboratory of Heavy Oil Processing, China Univ. of Petroleum, 66, Changjiang West Road, Economic & Technological Development Zone, Qingdao, Shandong Province 266580, CN, e-mail: Meng521baobei@126.com
7. State Key Laboratory of Heavy Oil Processing, China Univ. of Petroleum, 66, Changjiang West Road, Economic & Technological Development Zone, Qingdao, Shandong Province 266580, CN (Corresponding author), e-mail: zhangyuzhen1959@163.com