The Performance Study on La1−xSrxFe0.8Al0.2O3 Oxygen Carriers in Chemical Looping Dry Reforming of Methane for Syngas Production

Chemical looping can achieve high product selectivity using lattice oxygen in oxygen carriers for partial oxidation of methane. Oxygen carrier La1−xSrxFe0.8Al0.2O3 was prepared by sol-gel method for chemical looping dry reforming of methane. The reaction performance of the oxygen carrier doped with different proportions of Sr was tested by thermogravimetric and fixed bed reactor. The experimental results showed that the oxygen capacity of x = 0.4 oxygen carrier in La1−xSrxFe0.8Al0.2O3 is as high as 1.88 mmol·g−1, with excellent reaction performance and less carbon deposition. The stability of the oxygen carrier La0.6Sr0.4Fe0.8Al0.2O3 was further tested for 20 redox cycles. The oxygen carrier maintained excellent redox performance, achieving 61.2% methane conversion, 97.1% CO selectivity, and 1.81 H2/CO. The material characterization results displayed that the morphology and crystal structure of the oxygen carrier were stable. The results show that La0.6Sr0.4Fe0.8Al0.2O3 is an excellent oxygen carrier suitable for chemical looping dry reforming of methane. © 2024 Science Press. All rights reserved.