Funding for this research was provided by:
Natural Science Foundation of Ningxia Province (NZ17262)
Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Land and Resources (2019-KF-36)
New Catalytic Process in Clean Energy Production (ZDZX201803)
Article History
Received: 28 October 2019
Accepted: 23 December 2019
First Online: 1 January 2020