This invention provides a method for preparing a microtube monolithic
oxygen carrier, comprising the following steps: First, a
metal oxide is uniformly mixed with a binder,
solvent, and dispersant to obtain a
slurry; second, the
slurry and a first curing agent are simultaneously added to a porous mold and extruded to obtain a first product; the first product is placed in a second curing agent to complete a phase transformation process, and then dried and shaped to obtain a second product; finally, the second product undergoes preliminary
calcination and high-temperature
calcination to obtain the microtube monolithic
oxygen carrier. The monolithic
oxygen carrier prepared by this invention has abundant axial and radial hierarchical pore structures, enabling simultaneous achievement of low
bed pressure drop and low heat and
mass transfer resistance. The oxygen carrier exhibits high reactivity, strong resistance to
sintering and
carbon deposition, and can be used in processes such as
chemical looping combustion, reforming, or
hydrogen production of gaseous fuels in fixed-
bed reactors. The oxygen carrier structure is adjustable, has wide applicability to raw materials, and a simple preparation process, allowing for large-scale preparation and possessing broad prospects for promotion and application.