1. School of Engineering and Physical Sciences, Heriot-Watt University Malaysia, No. 1, Jalan Venna P5/2, Precinct 5, Putrajaya 62200, Malaysia
2. Department of Chemical & Environmental Engineering, University of Nottingham Malaysia, Jalan Broga, Semenyih 43500, Malaysia
3. Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA