Iron oxide supported on silicalite-1 as a multifunctional material for biomass chemical looping gasification and syngas upgrading

•Iron oxide supported on silicalite-1 served as oxygen carrier to partially oxidize biomass for syngas.•Reduced oxygen carrier exhibited outstanding tar catalytic cracking performance and high CO2 adsorption capacity.•The silicalite-1 support was resistant to undesired compound formation at high temperature.•The novel material is suitable for cyclic process with high thermal and chemical stability.