Issue 12, 2023

Hydrogenation of citral and carvone on Pt and PtSn supported metallic catalysts. A comparative study on the regioselectivity and chemoselectivity

Abstract

Pt and PtSn catalysts supported on oxide and carbonaceous materials have been studied for the regioselective and chemoselective hydrogenation of citral and carvone. The influence of the support properties, Sn addition, and reaction substrate structure were correlated with the catalytic behaviour. The catalysts were prepared by conventional impregnation. The results showed that adding Sn to the metallic phase strongly affects the selectivity to unsaturated alcohols (UA) in citral hydrogenation with bimetallic catalysts. At the same time, the structure of the carvone molecule plays an essential role in the formation of partially hydrogenated products derived from the regioselectivity of the reaction when both mono- and bimetallic catalysts are used. The highest selectivity towards UA obtained for the hydrogenation of citral on bimetallic PtSn catalysts can be explained by a strong Sn promoter effect, which allows a predominant atop adsorption mode of the carbonyl group. In the hydrogenation of carvone, the acid–base properties of the support and the Sn promoter scarcely influence the selectivity toward UA, but the bonding modes of the C[double bond, length as m-dash]O and C[double bond, length as m-dash]C groups, preferentially parallel to the catalytic surface, would explain the products formed and the lower selectivity toward UA compared to the citral molecule.

Graphical abstract: Hydrogenation of citral and carvone on Pt and PtSn supported metallic catalysts. A comparative study on the regioselectivity and chemoselectivity

Article information

Article type
Paper
Submitted
02 5月 2023
Accepted
21 8月 2023
First published
22 8月 2023

React. Chem. Eng., 2023,8, 3133-3149

Hydrogenation of citral and carvone on Pt and PtSn supported metallic catalysts. A comparative study on the regioselectivity and chemoselectivity

G. E. Ramos Montero, J. P. Stassi, S. R. de Miguel and P. D. Zgolicz, React. Chem. Eng., 2023, 8, 3133 DOI: 10.1039/D3RE00259D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements