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Effect of the Pt–Pd molar ratio in bimetallic catalysts supported on sulfated zirconia on the gas-phase hydrodechlorination of chloromethanes
dc.contributor.author | Bedia García-Matamoros, Jorge | |
dc.contributor.author | Arevalo-Bastante, A. | |
dc.contributor.author | Grau, J. M. | |
dc.contributor.author | Dosso, L. A. | |
dc.contributor.author | Rodríguez Jiménez, Juan José | |
dc.contributor.author | Mayoral, A. | |
dc.contributor.author | Diaz, I. | |
dc.contributor.author | Gómez Sainero, Luisa María | |
dc.contributor.other | UAM. Departamento de Ingeniería Química | es_ES |
dc.date.accessioned | 2019-01-15T11:06:13Z | |
dc.date.available | 2019-01-15T11:06:13Z | |
dc.date.issued | 2017-07-13 | |
dc.identifier.citation | Journal of Catalysis 352 (2017): 562 - 571 | en_US |
dc.identifier.issn | 0021-9517 (print) | en_US |
dc.identifier.issn | 1090-2694 (online) | en_US |
dc.identifier.uri | http://hdl.handle.net/10486/686229 | |
dc.description.abstract | Bimetallic Pt:Pd catalysts with different molar ratios and 0.5 wt.% overall metal load supported on sulfated zirconia catalysts were synthesized and tested in the gas-phase hydrodechlorination (HDC) of chloromethanes and their mixtures. The catalysts were characterized by adsorption–desorption of N2 at −196 °C, X-ray diffraction, X-ray photoelectronic spectroscopy, temperature-programmed reduction, and aberration-corrected scanning transmission electron microscopy (STEM). The effect of the Pt:Pd molar ratio on the activity, stability, and selectivity was analyzed. The high acidity of the sulfated zirconia results in metal particles of small size (mainly <5 nm), as confirmed by STEM. The bimetallic catalysts showed higher stability than the monometallic ones, as demonstrated in long-term experiments (80 h on stream), confirming the positive effect of combining the two metallic phases. Turnover frequency (TOF) values in the range 0.0007–0.0168 s−1 and apparent activation energies between ≈41 and 44 kJ·mol−1 were obtained. TOF values for dichloromethane HDC increased with increasing mean metal particle size within the range of this work (≈1.2–2.3 nm). The catalysts with Pt:Pd molar ratios of 1:3 and 1:1 showed significantly better performance than the 3:1 one for overall dechlorination due to their higher atomic metal content and TOF at the same total metal weight load (0.5%) | en_US |
dc.description.sponsorship | The authors are grateful to the Spanish ‘‘Ministerio de Economíay Competitividad (MINECO)” for financial support (ProjectsCTM2011-28352 and CTM2014-53008-R | es_ES |
dc.format.extent | 31 págs. | es_ES |
dc.format.mimetype | application/pdf | en |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.relation.ispartof | Journal of Catalysis | en_US |
dc.rights | © 2017 Elsevier Inc. | es_ES |
dc.subject.other | Chloromethanes | en_US |
dc.subject.other | Hydrodechlorination | en_US |
dc.subject.other | Palladium | en_US |
dc.subject.other | Platinum | en_US |
dc.subject.other | Sulfated zirconia | en_US |
dc.title | Effect of the Pt–Pd molar ratio in bimetallic catalysts supported on sulfated zirconia on the gas-phase hydrodechlorination of chloromethanes | en_US |
dc.type | article | en_US |
dc.subject.eciencia | Química | es_ES |
dc.date.embargoend | 2019-06-13 | |
dc.relation.publisherversion | https://doi.org/10.1016/j.jcat.2017.06.013 | es_ES |
dc.identifier.doi | 10.1016/j.jcat.2017.06.013 | es_ES |
dc.identifier.publicationfirstpage | 562 | es_ES |
dc.identifier.publicationissue | 352 | es_ES |
dc.identifier.publicationlastpage | 571 | es_ES |
dc.relation.projectID | Gobierno de España. CTM2011-2835 | es_ES |
dc.relation.projectID | Gobierno de España. CTM2014-53008-R | es_ES |
dc.type.version | info:eu-repo/semantics/acceptedVersion | en |
dc.rights.cc | Reconocimiento – NoComercial – SinObraDerivada | es_ES |
dc.rights.accessRights | openAccess | es_ES |
dc.authorUAM | Bedia García-Matamoros, Jorge (262140) | |
dc.facultadUAM | Facultad de Ciencias |