1. Department of Chemical Engineering, College of Engineering, Addis Ababa Science and Technology University, Addis Ababa 16417, Ethiopia
2. School of Chemical and Bio-engineering, Addis Ababa Institute of Technology, Addis Ababa University, Addis Ababa 1176, Ethiopia
3. Center of Excellence for Sustainable Energy Research, Addis Ababa Science and Technology University, Addis Ababa 16417, Ethiopia