1. School of Chemical and Biomedical Engineering; Nanyang Technological University; 62 Nanyang Drive 637459 Singapore
2. Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology; Department of Chemical Engineering; Tsinghua University; No. 1, Tsinghuayuan Beijing 100084 P.R. China
3. Singapore Institute of Manufacturing Technology; 71 Nanyang Drive 638075 Singapore