Influence of Cs Promoter on Ethanol Steam-Reforming Selectivity of Pt/m-ZrO2 Catalysts at Low Temperature

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dc.contributor.authorRajabi, Zahra
dc.contributor.authorJones, Li
dc.contributor.authorMartinelli, Michela
dc.contributor.authorQian, Dali
dc.contributor.authorCronauer, Donald C.
dc.contributor.authorKropf, A. Jeremy
dc.contributor.authorWatson, Caleb D.
dc.contributor.authorJacobs, Gary
dc.date.accessioned2021-09-25T23:33:50Z
dc.date.available2021-09-25T23:33:50Z
dc.date.issued2021-09-14
dc.date.updated2021-09-25T23:33:52Z
dc.description.abstractThe decarboxylation pathway in ethanol steam reforming ultimately favors higher selectivity to hydrogen over the decarbonylation mechanism. The addition of an optimized amount of Cs to Pt/m-ZrO2 catalysts increases the basicity and promotes the decarboxylation route, converting ethanol to mainly H2, CO2, and CH4 at low temperature with virtually no decarbonylation being detected. This offers the potential to feed the product stream into a conventional methane steam reformer for the production of hydrogen with higher selectivity. DRIFTS and the temperature-programmed reaction of ethanol steam reforming, as well as fixed bed catalyst testing, revealed that the addition of just 2.9% Cs was able to stave off decarbonylation almost completely by attenuating the metallic function. This occurs with a decrease in ethanol conversion of just 16% relative to the undoped catalyst. In comparison with our previous work with Na, this amount is—on an equivalent atomic basis—just 28% of the amount of Na that is required to achieve the same effect. Thus, Cs is a much more efficient promoter than Na in facilitating decarboxylation.
dc.description.departmentBiomedical Engineering and Chemical Engineering
dc.description.departmentMechanical Engineering
dc.identifierdoi: 10.3390/catal11091104
dc.identifier.citationCatalysts 11 (9): 1104 (2021)
dc.identifier.urihttps://hdl.handle.net/20.500.12588/688
dc.rightsAttribution 4.0 United States
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectethanol steam reforming (ESR)
dc.subjectDRIFTS
dc.subjectCs doping
dc.subjectzirconia
dc.subjectdecarboxylation
dc.subjectdecarbonylation
dc.titleInfluence of Cs Promoter on Ethanol Steam-Reforming Selectivity of Pt/m-ZrO2 Catalysts at Low Temperature
dc.typeArticle

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Margie and Bill Klesse College of Engineering and Integrated Design Faculty Research