Study on biomass adsorption‐enhanced steam gasification for hydrogen production based on dual‐effect catalyst

Abstract In this study, in order to achieve CO 2 capture under high‐temperature conditions and obtain hydrogen from biomass, a dual‐effect catalyst Ni( x )‐Na 2 ZrO 3 , possessing both catalytic and high‐temperature CO 2 adsorption capabilities, was prepared and applied in the biomass steam reforming reaction. The investigation focused on the impact of gasification temperature, steam to carbon (S/C) ratio, and Ni loading ratio on the production of hydrogen‐rich syngas via biomass enhanced steam gasification over the catalysts. By thermogravimetric analysis, the catalyst exhibited a remarkable high‐temperature CO 2 adsorption capability at 900°C and cyclic stability. The orthogonal experiment was conducted for the reaction characteristics of the biomass adsorption‐enhanced steam gasification over the dual‐effect Ni( x )‐Na 2 ZrO 3 catalyst. Through the analysis of the fitting formula, the catalyst successfully demonstrated promotional effect on the biomass reforming reaction. When the gasification temperature was 950°C, S/C ratio was 9 and Ni loading ratio was 7.7 wt%, the hydrogen yield reached 0.95 m 3 /kg, and carbon deposition rate was almost 0.