1. Center of Excellence on Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering; Chulalongkorn University; Bangkok 10330 Thailand
2. State Key Lab of Chemical Fibers and Polymer Materials, College of Material Science and Engineering; Donghua University; China
3. Department of Applied Chemistry, Graduate School of Engineering; Hiroshima University; Higashi-Hiroshima 739-8527 Japan