CFD 1 CuO 1 History of engineering & technology 1 algae 1 alkaline electrolysis 1 anaerobic digestion 1 biogas 1 biohydrogen 1 ceria 1 ceria-zirconia compact reactor 1 computational fluid dynamics 1 economic viability 1 energy assessment 1 energy storage 1 environmental efficiency 1 ethanol steam reforming 1 gasification 1 hydrogen energy 1 hydrogen production 1 hydrogen production processes 1 kinetic models 1 micro-channel reactor 1 microwave 1 model 1 multi- walled carbon nanotube 1 multi-criteria analysis 1 multi-functional material 1 nanoparticles 1 oxygen carrier 1