1. Key Laboratory of Coal Processing and Efficient Utilization Ministry of EducationChina University of Mining & Technology, Xuzhou 221116 Jiangsu China
2. Department of Chemistry and Chemical EngineeringHeze University Heze 274500 Shandong China
3. Laboratory of Coal Clean Conversion & Chemical Engineering Process, College of Chemistry and Chemical EngineeringXinjiang University Urumqi 830046, Xinjiang Uyghur Autonomous Region China