Chemical-looping reforming of methane coupled with CO₂ reduction is a promising technology that can not only use CH₄ more efficiently but also fix CO₂. Perovskite as an oxygen carrier shows excellent performance in this reaction, but the sintering and carbon deposition during the reaction process reduced its stability. Thus,a highly active and durable LaFe_0.8Co_0.15Cu_0.05O₃/hierarchical ZSM-5 oxygen carrier was prepared for efficient conversion of CH₄ and utilization of CO₂. The rich pore structure and high specific surface area of hierarchical zeolites can provide more loading sites for perovskite, which can effectively inhibit the sintering and carbon deposition problems of perovskite in the process of high temperature reaction, and greatly increase the performance of perovskite in this chemical-looping process. Compared with the traditional microporous ZSM-5, the introduction of hierarchical ZSM-5 results in a higher CH₄ conversion of LaFe_0.8Co_0.15Cu_0.05O₃ .
 

hierarchical zeolite,chemical-looping reforming of methane,CO2 reduction,syngas,perovskite