Hydrogen production from biomass steam gasification: Experiment and simulation

Abstract

In pine chips gasification experiment, at 700 °C and 15 % H2O, with the mass ratio of Ca90Fe10/B to 1.5, the H2 yield is 210.50 mL/g. The H2 yield improves by 2.39 times and the tar yield decreases by 16 % compared to without CaO. In the pine chips gasification simulation with the system's own thermal equilibrium, at 700 °C, the heat release of Ca90Fe10 adsorption of CO2 is 56.91 MJ/h for Ca90Fe10/B mass ratio of 1.5, and the required O2 inflow is 1.9 kg/h, the molar flow of H2 is 0.58 kmol/h. To achieve material circulation, 0.5 kg/h of CH4 is added to the calciner for combustion to satisfy heat absorption of CaCO3 to regenerate CaO, which consumes 2.0 kg/h of O2. The whole cycle O2 consumption is 3.90 kg/h, which is 1.02 kg/h less than without CaO, and the H2 yield has increased by 1.35 times.