Role of the support and chloride during the purification of 1‐pentene in alkyne/alkene streams over Pd catalysts
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Título: | Role of the support and chloride during the purification of 1‐pentene in alkyne/alkene streams over Pd catalysts |
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Autor/es: | Cordoba, Misael | Betti, Carolina P. | Martínez Bovier, Luciana | García, Lina | Coloma, Fernando | Ramírez, Alfonso | Quiroga, Mónica E. | Lederhos, Cecilia R. |
Grupo/s de investigación o GITE: | Materiales Avanzados |
Centro, Departamento o Servicio: | Universidad de Alicante. Servicios Técnicos de Investigación |
Palabras clave: | Selective hydrogenation | Alkyne | Palladium nanoparticles | Support | Alkene purification |
Área/s de conocimiento: | Química Inorgánica |
Fecha de publicación: | 10-abr-2021 |
Editor: | Society of Chemical Industry | Wiley |
Cita bibliográfica: | Journal of Chemical Technology and Biotechnology. 2021, 96(8): 2283-2297. https://doi.org/10.1002/jctb.6755 |
Resumen: | BACKGROUND: Pd nanoparticles over different supports were evaluated during the alkyne selective hydrogenation of medium chain (C7 and C5) and the 1‐pentene purification at mild operational conditions (150 kPa and 303 K). The role of support and chloride was investigated; γ‐Al2O3, γ‐Al2O3 modified with Mg, CaCO3 and activated carbon were used as supports, and PdCl2 as precursor salt. The classical Lindlar catalyst was used as reference. RESULTS: Surface acidity of supports, active sites dispersion and surface species (MgO, PdxClyOz and/or functional groups) can favor or disfavor the desorption of 1‐alkene during the purification of 1‐pentene stream. The smallest particle sizes (3.8–10.0 nm) favor the dissociative adsorption of hydrogen over Pd° active sites, promoting good catalytic behavior. The best synthesized catalysts are Pd/Al–Mg and Pd/Ca, and their high selectivity (≥90%) is favored by the presence of superficial acidic Lewis sites. On the contrary, lower selectivity (74–80%) is assessed on catalysts with Brönsted acidic sites (Pd/Al and Pd/RX3) that favored the undesired overhydrogenation or isomerization reactions. CONCLUSION: The geometric and electronic properties of the support have a major influence on the activity and selectivity of the catalysts. Low loaded Pd catalysts supported on Al2O3‐Mg and CaCO3 (Pd/Al‐Mg, Pd/Ca) can be used for the purification of medium or large terminal alkenes at mild reaction conditions as an alternative to the toxic Lindlar commercial catalyst. |
Patrocinador/es: | The financial support provided by Universidad Nacional del Litoral (UNL, Grants CAI+D), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET, Grant PIP 11220130100457CO), and Agencia Nacional de Promoción de Ciencia y Tecnológica (ANPCyT, Grants PICT 2016 and 2020) are acknowledged. L. García thanks Ministerio de Ciencia Tecnología e Innovación de Colombia (Minciencias, Call 860, for Doctorates abroad 2019). |
URI: | http://hdl.handle.net/10045/114639 |
ISSN: | 0268-2575 (Print) | 1097-4660 (Online) |
DOI: | 10.1002/jctb.6755 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2021 Society of Chemical Industry (SCI) |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1002/jctb.6755 |
Aparece en las colecciones: | INV - LMA - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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Cordoba_etal_2021_JChemTechBiotech_accepted.pdf | Accepted Manuscript (acceso abierto) | 2,11 MB | Adobe PDF | Abrir Vista previa |
Cordoba_etal_2021_JChemTechBiotech_final.pdf | Versión final (acceso restringido) | 3,37 MB | Adobe PDF | Abrir Solicitar una copia |
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