1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, PR China
2. University of Chinese Academy of Sciences, Beijing 100049, PR China
3. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, P.R. China
4. Synfuels China Co., Ltd., Beijing 101400, PR China