AuCu/TiO2 catalysts prepared using electron beam irradiation for the preferential oxidation of carbon monoxide in hydrogen-rich mixtures

dc.creatorALENCAR, C.S.L.
dc.creatorPAIVA, A.R.N.
dc.creatorSILVA, L.G.A.
dc.creatorSOMESSARI, E.S.R.
dc.creatorVAZ, J.M.
dc.creatorSPINACE, E.V.
dc.date2021
dc.date2021-08-03T19:16:22Z
dc.date2021-08-03T19:16:22Z
dc.date.accessioned2023-09-28T14:18:57Z
dc.date.available2023-09-28T14:18:57Z
dc.identifier2319-0612
dc.identifierhttp://repositorio.ipen.br/handle/123456789/32128
dc.identifier1A
dc.identifier9
dc.identifier10.15392/bjrs.v9i1A.1497
dc.identifier0000-0002-7011-8261
dc.identifierSem Percentil
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/9002351
dc.descriptionThe major part of the world production of hydrogen (H2) is originated from a combination of methane steam reforming and water gas shift reaction resulting in an H2 rich mixture known as reformate gas, which contains about 1% vol (10,000 ppm) of carbon monoxide (CO). The preferential oxidation reaction of CO in H2 rich mixtures (CO PROX) has been considered a very promising process for H2 purification, reducing CO for values below 50 ppm allowing its use in PEMFC Fuel Cells. Au nanoparticles supported on TiO2 (Au/TiO2) catalysts have been shown good activity and selectivity for CO PROX reaction in the temperature range between 20 80 ??C; however, the catalytic activity strongly depends on the preparation method. Also, the addition of Cu to the Au/TiO2 catalyst could increase the activity and selectivity for CO PROX reaction. In this work, AuCu/TiO2 catalysts with composition 0.5%Au0.5%Cu/TiO2 were prepared in a single step using electron beam irradiation, where the Au3+ and Cu2+ ions were dissolved in water/2 propanol solution, the TiO2 support was dispersed and the obtained mixture was irradiated under stirring at room temperature using different dose rates (8 64 kGy s 1) and total doses (144 576 kGy). The catalysts were characterized by energy dispersive X ray analysis, X ray diffraction transmission electron microscopy, temperature programmed reduction and tested for CO PROX reaction. The best result was obtained with a catalyst prepared with a dose rate of 64 kGy s 1 and a total dose of 576 kGy showed a CO conversion of 45% and a CO2 selectivity of 30% at 150 ??C.
dc.descriptionFunda????o de Amparo ?? Pesquisa do Estado de S??o Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Cient??fico e Tecnol??gico (CNPq)
dc.descriptionFAPESP: 14/50279-4; 17/11937-4; 14/09087-4; 18/04802-8
dc.descriptionCNPq: 304869/2016-3
dc.format1-16
dc.relationBrazilian Journal of Radiation Sciences
dc.rightsopenAccess
dc.sourceMeeting on Nuclear Applications (ENAN), 14th, October 21-25, 2019, Santos, SP
dc.subjectabsorbed radiation doses
dc.subjectcarbon monoxide
dc.subjectcatalysts
dc.subjectcopper
dc.subjectdose rates
dc.subjectelectron beams
dc.subjectgold
dc.subjecthydrogen
dc.subjectirradiation
dc.subjectmixtures
dc.subjectnanoparticles
dc.subjectoxidation
dc.subjecttitanium oxides
dc.titleAuCu/TiO2 catalysts prepared using electron beam irradiation for the preferential oxidation of carbon monoxide in hydrogen-rich mixtures
dc.typeArtigo de peri??dico
dc.coverageN


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