1. Key Laboratory of Coal Processing and Efficient Utilization, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China
2. Shannxi Key Laboratory of Low Metamorphic Coal Clean Utilization, School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, Shannxi, China
3. Cosychem Technology (Tianjin) Co., Ltd., Tianjin 300450, China