1. School of Chemical Engineering, Northwest University, Xi’an 710069, People’s Republic of China
2. School of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization, Yulin University, Yulin 719000, People’s Republic of China
3. The Research Center of Chemical Engineering Applying Technology for Resource of Shaanxi, Xi’an 710069, People’s Republic of China