In situ characterization of catalysts using synchrotron multi-techniques

• Grant number: 12/00523-0
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: July 02, 2012
• End date: July 01, 2013
• Field of knowledge: Engineering - Chemical Engineering
• Principal Investigator: José Maria Correa Bueno
• Grantee: Débora Motta Meira
• Supervisor: Sakura Pascarelli
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Institution abroad: European Synchrotron Radiation Facility (ESRF), France

Abstract

The aim of this work is to understand the synergism and the role of some metals (M = Pt, Au and Rh) and Ce in water-gas shift reaction and steam reforming of methane, by probing M/CeO2-Al2O3 catalysts under reaction conditions. Both reactions are important to produce pure H2, a strategic energy carrier for several technologies. For that, a multi-technique approach using synchrotron radiation will be explored under operando conditions. Two kinds of experiments are planed; the first one is to combine either X ray absorption spectroscopy (XAS) or X ray diffraction (XRD) with infrared spectroscopy (DRIFTS) coupled with a mass spectrometer to obtain time-resolved information about the oxidation state, particle size, structure and species formed at the catalyst surface as a function of reaction conditions (temperature and gas feed) and catalyst preparation method. The QuXAS/DRIFTS and HXRD/DRIFTS experiments will be performed at ESRF, France, at BM23 or ID24 and ID15, respectively. The second type of experiment is to observe spatial-resolved characteristics of the catalysts, through the catalytic bed, using for this a capillary reactor, leading to a complete mapping of the parameters that influence the performance of the catalysts. This study is part of the PhD thesis of the candidate. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MEIRA, D. M.; RIBEIRO, R. U.; MATHON, O.; PASCARELLI, S.; BUENO, J. M. C.; ZANCHET, D.. Complex interplay of structural and surface properties of ceria on platinum supported catalyst under water gas shift reaction. APPLIED CATALYSIS B-ENVIRONMENTAL, v. 197, n. SI, p. 73-85, NOV 15 2016. (11/50727-9, 12/00523-0)

MEIRA, D. M.; RIBEIRO, R. U.; MATHON, O.; PASCARELLI, S.; BUENO, J. M. C.; ZANCHET, D.. Complex interplay of structural and surface properties of ceria on platinum supported catalyst under water gas shift reaction. APPLIED CATALYSIS B-ENVIRONMENTAL, v. 197, p. 13-pg., 2016-11-15. (11/50727-9, 12/00523-0)