1. College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan, Shanxi 030024, PR China
2. State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan, Shanxi 030024, PR China
3. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi 030001, PR China
4. Key Laboratory of Coal Science and Technology, Taiyuan University of Technology, Ministry of Education, Taiyuan, Shanxi 030024, PR China
5. College of Engineering and Applied Science, University of Wyoming, Laramie, Wyoming 82071, United States
6. School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
7. School of Energy Resources, University of Wyoming, Laramie, Wyoming 82071, United States