Synthesis of trans-pinocarveol from oxidation of β-pinene using multifunctional heterogeneous catalysts
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INVESTIGACIONMetadata
Title
Synthesis of trans-pinocarveol from oxidation of β-pinene using multifunctional heterogeneous catalystsAuthor (s)
Date
2023Publisher
ElsevierBibliographic citation
SÁNCHEZ-VELANDIA, Julián E., et al. Synthesis of trans-pinocarveol from oxidation of β-pinene using multifunctional heterogeneous catalysts. Molecular Catalysis, 2023, vol. 541, p. 113104.Type
info:eu-repo/semantics/articlePublisher version
https://www.sciencedirect.com/science/article/pii/S2468823123001906Version
info:eu-repo/semantics/publishedVersionSubject
Abstract
In this contribution, several multifunctional heterogeneous catalysts comprising an acid and a metal function were synthesized by wetness impregnation and tested in the allylic oxidation (with hydrogen peroxide as an ... [+]
In this contribution, several multifunctional heterogeneous catalysts comprising an acid and a metal function were synthesized by wetness impregnation and tested in the allylic oxidation (with hydrogen peroxide as an oxidizing agent) of β-pinene, a monoterpene which is present in several plants being one of the main constituents of the turpentine oil. Among the tested catalysts, the material containing Pd with a heteropolyacid supported on SBA-15 (Pd/HPA-300/SBA-15) was the best catalyst achieving the most promising results (up to 65% of yield to trans-pinocarveol). Independent on the Pd loading (0.5 wt% or 1.0 wt%) and calcination temperature of the heteropolyacid supported on SBA-15 (200°C-300°C), selectivity to trans-pinocarveol remained the same. At the same time the calcination temperature affected conversion, Pd dispersion, acidity, and the surface area. When the support changed to amorphous SiO2 (with a lower surface area < 200 m2/g) both selectivity and conversion decreased dramatically to values lower than 20%. Weak Brønsted acid sited together with a typical particles shape favors formation and selectivity to the desired product. Laboratory scaling up of β-pinene oxidation was performed (up to 10 mL) achieving the same results in terms of activity and selectivity thereby showing a possibility of a practical implementation of the proposed catalytic system. Kinetic modelling of the reaction was performed to elucidate the determining steps involving in the allylic oxidation of β-pinene. The catalysts showed to be robust since it can be used up to 3 times without apparent changes in both selectivity and conversion but with a slight presence of lixiviation. [-]
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Molecular Catalysis, 2023, vol. 541, p. 113104Funder Name
Ministerio de Ciencia, Tecnología e Innovación | Ministerio de Educación Nacional, Colombia. | Ministerio de Industria, Comercio y Turismo, Colombia. | ICETEX, Colombia, Programme Ecosistema Cientifico-Colombia Cientifica from Fondo Francisco Jose de Caldas, Colombia | Pontificia Unversidad Javeriana
Project code
RC-FP44842-212-2018 | 20385
Rights
info:eu-repo/semantics/openAccess
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