Research progress on chemical looping reforming of macromolecular components of volatiles from biomass pyrolysis based on decoupling strategy.

This paper focuses on the development of chemical-looping reforming of macromolecular organic compounds from biomass pyrolysis based on decoupling strategy, including glycerol, benzene, and toluene. Firstly, the influence characteristics of pyrolysis conditions on the distribution of volatile are analyzed. Pyrolysis temperature and heating rate are the two most important factors. Three technical routes to prepare hydrogen-rich syngas by chemical-looping reforming of typical macromolecular components in the volatile components of biomass pyrolysis were emphatically discussed, which include auto-thermal chemical-looping reforming (CLRa), chemical-looping steam reforming (CLSR), and chemical-looping dry reforming (CLDR). The types of oxygen carriers, reforming characteristics, and reaction mechanisms related to the above three routes were compared. In the future, chemical-looping reforming based on the decoupling strategy focuses on developing oxygen carriers with high lattice oxygen reserves, fast transmission rate and good anti-coke formation performance, and more efficient fluidized bed reactors. At the same time, density functional theory calculations and reaction experiments combined to reveal the reaction mechanism, integrate and optimize the system's energy flow and material flow. [Display omitted] • Decoupling strategy divided chemical looping reforming into three approaches. • Three paths of macromolecular chemical looping reforming were analyzed. • Lattice oxygen transfer and reactivity of metal oxides were the keys to oxygen carrier. • There were mainly two surface reaction mechanisms between volatiles and oxygen carrier. • Key points of chemical looping reforming based on decoupling strategy were proposed. [ABSTRACT FROM AUTHOR]