1. Petrochemical
Research Institute, King Abdulaziz City for Science and Technology, P. O. Box
6086 Riyadh 11442, Kingdom of Saudi Arabia
2. College
of Science, China University of Petroleum, Qingdao 266580, China
3. PetroChina
Petrochemical Research Institute, CNPC Company, Beijing 102206, China
4. State
Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China