1. State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
2. Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Shanghai 201204, China
3. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China
4. Department of Chemical Engineering, Norwegian University of Science and Technology, Trondheim N-7491, Norway