1. Green Engineering Research Group; Department of Chemical Engineering, Faculty of Engineering and Built Environment, Durban University of Technology 4001, Durban, South Africa
2. Department of Chemical Engineering, Abubakar Tafawa Balewa University, Bauchi P.M.B 0248. 740272, Bauchi, Nigeria
3. Department of Chemical and Petroleum Engineering, Bayero University, Kano, P.M.B 3011. 700006, Kano Nigeria