1. Engineering and Technology Institute of Lunan Coal Chemical Engineering, Zaozhuang University, Zaozhuang 277160, Shandong, China
2. Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China
3. College of Chemistry and Chemical Engineering, Heze University, Heze 274015, Shandong, China
4. College of Chemistry, Chemical Engineering and Material Science, Zaozhuang University, Zaozhuang 277160, Shandong, China