1. Department of Chemical and Environmental Engineering, University of Nottingham Malaysia, Broga Road, 43500 Semenyih, Selangor, Malaysia, Center for Engineering and Sustainable Development Research, De La Salle University-Manila, 2401 Taft Avenue, 1004 Manila, Philippines, and Department of Chemical Engineering, University of Pretoria, Lynnwood Road, Pretoria 0002, South Africa