1. State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, P. R. China
2. Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, P. R. China
3. College of Chemistry, Taiyuan University of Technology, Taiyuan, Shanxi, 030024 P. R. China
4. National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and Equipment, School of Environment, Tsinghua University, Beijing 100084, China