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dc.contributor.authorWu, Xiao-Yu
dc.contributor.authorGhoniem, Ahmed F.
dc.date.accessioned2018-01-04T07:51:40Z
dc.date.available2018-01-04T07:51:40Z
dc.date.issued2018-01-04
dc.identifier.citationWu X-Y, Ghoniem AF (2017) H2-assisted CO2 thermochemical reduction on La0.9Ca0.1FeO3-δ membranes: a kinetics study. ChemSusChem. Available: http://dx.doi.org/10.1002/cssc.201701372.
dc.identifier.issn1864-5631
dc.identifier.doi10.1002/cssc.201701372
dc.identifier.urihttp://hdl.handle.net/10754/626704
dc.description.abstractKinetics data for CO2 thermochemical reduction in an isothermal membrane reactor is required to identify the rate-limiting steps. Here, we report a detailed reaction kinetics study on this process supported by an La0.9Ca0.1FeO3-δ (LCF-91) membrane. The dependence of CO2 reduction rate on various operating conditions is examined such as CO2 concentration on the feed side, fuel concentrations on the sweep side and temperatures. CO2 reduction rate is proportional to the oxygen flux across the membrane, and the measured maximum fluxes are 0.191 and 0.164 μmol cm-2 s-1 with 9.5% H2 and 11.6% CO on the sweep side at 990oC, respectively. Fuel is used to maintain the chemical potential gradient across the membrane and CO is used by construction to derive the surface reaction kinetics. This membrane also exhibits stable performances for 106 hours. A resistance-network model is developed to describe the oxygen transport process and the kinetics data are parameterized using the experimental values. The model shows a transition of the rate limiting step between the surface reactions on the feed side and the sweep side depending on the operating conditions.
dc.description.sponsorshipThe authors would like to thank both Shell and the King Abdullah University of Science and Technology (KAUST) for funding the research.
dc.publisherWiley
dc.titleH2-assisted CO2 thermochemical reduction on La0.9Ca0.1FeO3-δ membranes: a kinetics study
dc.typeArticle
dc.identifier.journalChemSusChem
dc.contributor.institutionMassachusetts Institute of Technology; Department of Mechanical Engineering; 77 Mass Ave, Rm 3-339N 02139 Cambridge UNITED STATES
dc.contributor.institutionMassachusetts Institute of Technology; Department of Mechanical Engineering; 77 Massachusetts Avenue 02139 Cambridge UNITED STATES
dc.date.published-online2018-01-04
dc.date.published-print2018-01-23


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