1. Laboratory of Coal Processing and Efficient Utilization of Ministry of Education School of Chemical Engineering & Technology China University of Mining and Technology Xuzhou 221116 China
2. School of Chemical Engineering & Technology China University of Mining and Technology Xuzhou 221116 China
3. Institute of Chemistry and Chemical Technology Mongolian Academy of Sciences Ulaanbaatar 13330 Mongolia
4. Baoqing Coal Power & Chemical Corporation CHN Energy Shuangyashan 230500 China