NiO-LaCoO3 catalysts for biomass pyrolysis to hydrogen-rich gas

Abstract

This study presents a new pathway for effective and environmentally friendly hydrogen generation from biomass pyrolysis using perovskite-type catalysts for highly valuable biomass conversion. Firstly, the impact of different Ni doping levels on LaCoO catalytic reactivity was investigated. On this basis, the impacts of different carbide slag adding proportions and reaction temperatures on the hydrogen yield and concentration were investigated. Among them, the maximum hydrogen yield at 600 °C under NiLaCo catalyst is 553.79 mL/g when the proportion of carbide slag is 5:15, and the volume concentration of hydrogen is 62.67 vol%. The outcomes demonstrated that the prepared NiO-LaCoO has excellent cycling performance, and the hydrogen yield of the NiLaCo catalyst decreased only marginally from 546.98 mL/g to 503.94 mL/g after ten cycles, with a comparatively small reduction of only 7.87 %. In particular, a high hydrogen concentration of 63.43 vol% is maintained in the pyrolysis gas.