Study of calcium-based waste on adsorption enhanced biomass gasification for hydrogen production

In order to improve the efficiency of biomass gasification to hydrogen production, the comprehensive utilization of industrial solid waste resources, the use of calcium-based waste-calcium carbide slag as a CO₂ adsorbent, experiments were carried out in a two-stage fixed bed to explore the effect of calcium-based waste addition, reaction temperature on the biomass gasification hydrogen production characteristics, focusing on the study of the adsorbent in practical applications of the cyclic adsorption performance, and thus discuss the influence mechanism of calcium carbide slag on biomass adsorption enhanced gasification. The results show that with the gradual increase of calcium carbide slag addition, H₂ yield and concentration show an increasing trend. With the increase of temperature, the yield and concentration of H₂ increase first and then decrease. When the CaO/C molar ratio is 1 and the temperature of the reforming section is 700 ℃, the yield and concentration of H₂ in the gas product are 154.34 mL/g biomass and 26.76%, and the maximum value is obtained. When the number of calcium carbide slag cycles is less than 5, the concentration and yield of H₂ increase compared to the initial reaction.