1. College of Earth Sciences, Jilin University, Changchun, Jilin, 130061, PR China
2. Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, U.K.
3. The In-situ Conversion Demonstration Branch of State Center for Research and Development of Oil Shale Exploitation, Jilin Zhongcheng Oil Shale Group Co., Ltd., Changchun, Jilin, 130033, China