1. Center
for Advanced Research of Energy and Materials, Hokkaido University, Sapporo 060-8628, Japan
2. Sakaide
Plant, Mitsubishi Chemical Corporation, Kagawa 762-8510, Japan
3. Technical
Research and Development Bureau, Nippon Steel and Sumitomo Metal Corporation, Chiba 293-8511, Japan
4. Energy
Technology Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8569, Japan