1. CSIRO Energy Technology, Post Office Box 883, Kenmore, Queensland 4069, Australia
2. Key
Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan, Shanxi 030024, People’s Republic of China
3. Fuels and Energy Technology Institute, Curtin University of Technology, GPO
Box U1987, Perth, Western Australia 6845, Australia