1. University Lecturer, Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province, Yancheng Institute of Technology, Yancheng 224051, P.R. China (corresponding author).
2. Professor, State Key Laboratory of Heavy Oil Processing, China Univ. of Petroleum, Qingdao 266580, P.R. China.
3. Engineer, East-China Design Branch, China Petroleum Engineering Construction Corporation, Qingdao 266071, P.R. China.