1. College of Chemistry and Chemical Engineering, Taiyuan University of Technology
2. Taiyuan 030024
3. P. R. China
4. Particle Technology Research Centre, Department of Chemical and Biochemical Engineering, The University of Western Ontario
5. London
6. Canada
7. College of Materials Science and Engineering, Taiyuan University of Technology
8. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences
9. China