Hydrogen production from biomass steam gasification: Experiment and simulation.

• Decreasing the production of CO 2 and tar in biomass gasification. • Effect of CaO carbonation heat release on biomass gasification to hydrogen. • Reducing O 2 consumption for biomass gasification in self-heating systems. • Obtaining hydrogen-rich syngas. In pine chips gasification experiment, at 700 °C and 15 % H 2 O, with the mass ratio of Ca 90 Fe 10 /B to 1.5, the H 2 yield is 210.50 mL/g. The H 2 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 Ca 90 Fe 10 adsorption of CO 2 is 56.91 MJ/h for Ca 90 Fe 10 /B mass ratio of 1.5, and the required O 2 inflow is 1.9 kg/h, the molar flow of H 2 is 0.58 kmol/h. To achieve material circulation, 0.5 kg/h of CH 4 is added to the calciner for combustion to satisfy heat absorption of CaCO 3 to regenerate CaO, which consumes 2.0 kg/h of O 2. The whole cycle O 2 consumption is 3.90 kg/h, which is 1.02 kg/h less than without CaO, and the H 2 yield has increased by 1.35 times. [ABSTRACT FROM AUTHOR]