1. School of Chemical and Energy Engineering, Faculty of EngineeringUniversiti Teknologi Malaysia Johor Bahru Malaysia
2. Centre of Hydrogen EnergyInstitute of Future Energy, Universiti Teknologi Malaysia Johor Bahru Malaysia
3. Department of Chemical EngineeringKing Fahd University of Petroleum & Minerals Dhahran 31261 Saudi Arabia
4. Department of Chemical EngineeringAbubakar Tafawa Balewa University PMB 0248 Bauchi, Bauchi State Nigeria