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The use of strontium ferrite perovskite as an oxygen carrier in the chemical looping epoxidation of ethylene

Gabra, S and Marek, EJ and Poulston, S and Williams, G and Dennis, JS (2021) The use of strontium ferrite perovskite as an oxygen carrier in the chemical looping epoxidation of ethylene. Applied Catalysis B: Environmental, 286. ISSN 0926-3373

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Abstract

In the epoxidation of ethylene to ethylene oxide using chemical looping, Ag is supported on strontium ferrite perovskite, where Ag acts as the catalyst while the perovskite acts as an oxygen carrier. This study explores how various oxygen carriers based on strontium ferrite affect chemical looping epoxidation. The structure of the oxygen carrier was varied by incorporating different ratios of two perovskite phases: cubic SrFeO , and a layered Ruddlesden-Popper (RP) phase: Sr Fe O . Maximum yield of ethylene oxide was obtained for the sample with 1:1 SrFeO :RP ratio, leading to an increase in the yield of ethylene oxide around 4 times, compared to only SrFeO (i.e. 0.4–1.6% ethylene oxide yield). These results confirm a possibility of designing the oxygen carriers used in chemical looping epoxidation towards optimal performance. Such a design approach can be expanded to other chemical looping processes to tune the performance of oxygen carrier for the reaction in question. 3 3 2 7 3 3

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div A > Energy
Depositing User: Cron Job
Date Deposited: 26 Dec 2020 20:17
Last Modified: 13 Apr 2021 09:42
DOI: 10.1016/j.apcatb.2020.119821