The efficient conversion and clean utilization of biomass resources are significant for achieving sustainable energy development and the environment. Biomass gasification can produce syngas under relatively mild conditions, preparing various downstream products. Addressing the challenges of low energy efficiency, high tar content, and insufficient hydrogen-to-carbon ratio in conventional biomass gasification technology, a new decoupling strategy for biomass pyrolysis and volatile reforming is proposed in different reactors, and chemical looping operations are introduced in the reforming process, aiming to develop a new and efficient process for biomass to produce hydrogen-rich synthesis gas. This report proposed a multifunctional oxygen carrier-oriented preparation strategy with a novel composite architecture of metal/nano iron oxide @ molecular sieve. Based on the theoretical design, multifunctional oxygen carriers with different active metal oxides (Fe2O3, NiFe2O4) encapsulated in different mesoporous silica molecular sieves (SBA-15, SBA-16) were prepared using impregnation and in-situ synthesis methods. The crystal phase evolution of the oxygen carrier before and after the reaction was characterized by XRD. The influence of embedding active components in the oxygen carrier on the mesoporous structure, pore size, and specific surface area of the molecular sieve was explored using BET. The reduction path of the oxygen carrier was speculated using H2-TPR. The above characterization methods have clarified oxygen carriers' physical and chemical properties, providing a basis for exploring their performance changes in biomass pyrolysis, volatilization, differentiation, and looping reforming.
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