Published 2009 | Version v1
Miscellaneous Metadata-only

The effects of CeO2 on the activity and stability of Pt supported catalysts for methane reforming, as addressed by in situ temperature resolved XAFS and TEM analysis

Creators

  • 1. Universidade Federal de Sao Carlos (UFSCar), SP (Brazil)
  • 2. Laboratorio Nacional de Luz Sincrotron (LNLS), Campinas, SP (Brazil)
  • 3. PETROBRAS S.A., Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES)
  • 4. Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil)
  • 5. Instituto Nacional de Tecnologia (INT), Rio de Janeiro, RJ (Brazil). Lab. de Catalise

Description

The effects of Ce as a promoter on the activity and stability of Pt/Al2O3 and Pt/CeO2-Al2O3 catalysts for auto thermal reforming and partial oxidation of methane were investigated. The Pt/Ceo2-Al2O3 catalyst exhibited higher activity and stability than the Pt/Al2O3 catalyst that showed strong Pt agglomeration with time on stream. The higher stability of the Pt/CeO2-Al2O3 catalyst was attributed to a combination of different properties: (1) hindrance of carbon deposition on the Pt surface; (2) interaction of Pt-O-Ce species in the presence of oxygen, inhibiting vapour and diffusion transport of PtO2 and mainly (3) thermal stability of the support, which prevents the loss of surface area, and consequently the sintering of the Pt. X-ray absorption fine structure spectroscopy and transmission electron microscopy were used to support these conclusions. (author)

Part of:
Activity report 2009 - Brazilian Synchrotron Light Laboratory - LNLS

Additional details

Publishing Information

Imprint Title
Activity report 2009 - Brazilian Synchrotron Light Laboratory - LNLS
Imprint Pagination
132 p.
Journal Page Range
p. 48-53
ISSN
1518-0204

INIS

Country of Publication
Brazil
Country of Input or Organization
Brazil
INIS RN
42034303
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; S43: PARTICLE ACCELERATORS;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
AGGLOMERATION; ALUMINIUM; BRAZILIAN LNLS; CATALYSIS; CATALYSTS; CERIUM; CERIUM OXIDES; DIFFUSION; INHIBITION; LIGHT SOURCES; PLATINUM; POROSITY; PROMOTERS; SINTERED MATERIALS; SINTERING; STORAGE RINGS; SYNCHROTRON RADIATION; SYNCHROTRON RADIATION SOURCES; X-RAY SOURCES
Descriptors DEC
BRAZILIAN ORGANIZATIONS; BREMSSTRAHLUNG; CERIUM COMPOUNDS; CHALCOGENIDES; ELECTROMAGNETIC RADIATION; ELEMENTS; FABRICATION; MATERIALS; METALS; NATIONAL ORGANIZATIONS; OXIDES; OXYGEN COMPOUNDS; PLATINUM METALS; RADIATION SOURCES; RADIATIONS; RARE EARTH COMPOUNDS; RARE EARTHS; TRANSITION ELEMENTS

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