1. CRC for Clean Power from Lignite, Department of Chemical Engineering, PO Box 36, Monash University, Victoria 3800, Australia, CRC for Clean Power from Lignite, School of Chemistry, PO Box 23, Monash University, Victoria 3800, Australia, and Centre for Advanced Research of Energy Conversion Materials, Hokkaido University, N13-W8, Kita-ku, Sapporo 060-8628, Japan