Funding for this research was provided by:
Xixia District Science and Technology Plan Project
Natural Science Foundation of Ningxia Province (NZ17262)
Open Project of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University (2019-KF-36)
Clean Energy Institute (ZDZX201803)
Article History
Received: 9 March 2020
Accepted: 19 June 2020
First Online: 3 July 2020
Compliance with ethical standards
:
: There are no conflicts of interest in this study.