1. Key Laboratory of Coal Cleaning Conversion and Chemical Engineering Process, Xinjiang Uyghur Autonomous Region, College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, Xinjiang, China
2. College of Chemical and Biological Engineering, Shangdong University of Science and Technology, Qingdao 266590, Shandong, China
3. Key Laboratory of Coal Processing and Efcient Utilization, Ministry of Education, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China