1. Department of Petroleum Engineering; University Technology Petronas; 32610 Bandar Seri Iskandar Darul Ridzuan Perak Malaysia
2. Department of Chemical Engineering, Faculty of Engineering; University of Malaya; 50603 Kuala Lumpur Malaysia
3. Center for Energy Science, Department of Mechanical Engineering; University of Malaya; 50603 Kuala Lumpur Malaysia