1. Department of Mechanical EngineeringFaculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
2. Environmental EngineeringFaculty of Engineering and Green Technology, University of Tunku Abdul Rahman, Kampar, Perak, Malaysia
3. Department of Chemical EngineeringFaculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
4. Department of Chemical EngineeringUniversiti Malaysia Pahang, 26300 Kuantan, Pahang, Malaysia