A novel biomass hydrogen production technique by integrating gasification and absorption reactions has been suggested. The method involves gasification of biomass in presence of a CO2 sorbent. Ethanol was used as the model biomass compound and CaO was the representative sorbent. Equilibrium modeling was used to determine the product gas composition and hydrogen yield. The analysis was done using ASPEN PLUS software (version 12.1) and Gibbs energy minimization approach was followed. The effects of temperature, pressure, steam/ethanol ratio and CaO/ethanol ratio on product yield were investigated. Three case studies were conducted to understand the effect of sorbent addition on hydrogen yield. Finally a simple energy analysis was carried out to determine the energy consumption and efficiency of sorbent enhanced ethanol gasification.

Volume Subject Area:
Advanced Energy Systems
Keywords:
biomass, hydrogen, gasification, thermodynamics, sorbent
Topics:
Biomass, Ethanol, Fuel gasification, Hydrogen, Hydrogen production, Sorbents
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