1-03　Development of Hydrogen Production Process Using biomass Production of Reduced Particles and Hydrogen

Abstract

In recent years, Japan has been focusing on the use of hydrogen in anticipation of global energy demand. This study focused on chemical looping combustion (CLC) as a practical hydrogen production technology using biomass. In the CLC process, oxygen carrier (based on iron oxide) particles are circulated while reacting with fuel, water, and air, enabling the simultaneous production of hydrogen, CO₂, and oxygen-depleted air, separately. In the experiment, a small-scale fluidized bed reactor was used to confirm whether iron oxide particles could be reduced to FeO since reduction degree to FeO is needed to produce hydrogen by introducing steam. The amount of supplied biomass was changed to determine the optimum feed to biomass to produce H₂. An operating guideline of 0.08 mol-H₂/kg-particle was obtained for K-ilmenite. The effect of coexisting gases (H₂O, CO₂) during particle reduction step on hydrogen production and char formation depended on type of oxygen carrier particles.