1. State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences Taiyuan 030001 Shanxi P. R. China
2. University of Chinese Academy of Sciences Beijing 100049 P. R. China
3. CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201203 P. R. China
4. College of Chemistry and Chemical Engineering Northeast Petroleum University Daqing 163318 P. R. China