Biohydrogen production from kitchen based vegetable waste: Effect of pyrolysis temperature and time on catalysed and non-catalysed operation

► High temperature favors high H2 yield in vegetable waste pyrolysis. ► The catalyst presence reduced the CO2 percentage in the bio-gas. ► Presence of sand as catalyst increases the methane yield considerably. ► Presence of silica based catalyst improves the calorific value of bio-gas.