1. Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka 819-0395, Japan
2. Petroleum Research Center, Kuwait Institute for Scientific Research, Safat 13109, Kuwait
3. JGC Catalysts and Chemicals Ltd, Fukuoka 212-0013, Japan
4. College of Engineering, Hanbat National University, Daejeon 305-719, Republic of Korea
5. Kyushu Environmental Evaluation Association, Fukuoka, Japan