1. Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education China University of Mining & Technology Xuzhou 221116, Jiangsu China
2. State Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering Ningxia University, Yinchuan 750021 Ningxia China
3. Laboratory of Coal Clean Conversion & Chemical Engineering Process College of Chemistry and Chemical Engineering, Xinjiang University Urumqi 830046, Xinjiang Uyghur Autonomous Region China