1. State Key Laboratory of Clean and Efficient Coal Utilization/Key Laboratory of Coal Science and Technology of Shanxi Province and Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China
2. Lu’an Chemical Group Co., Ltd, Changzhi 046204, China
3. Shanxi Institute of Energy, Jinzhong 030600, China
4. College of Textile Engineering, Taiyuan University of Technology, Taiyuan 030600, China