HETEROGENEOUS CATALYSIS IN SUSTAINABLE GREEN SOLVENT: ALKENES HYDROGENATION WITH NEW SILICA IMMOBILIZED PALLADIUM COMPLEX CONTAINING S,O-CHELATING LIGAND

Year 2018, Volume: 19 Issue: 2, 546 - 554, 30.06.2018

Filiz Yılmaz

https://doi.org/10.18038/aubtda.409518

Cited By: 1

Abstract

Pd(II) complex containing S,O-chelating ligand
was immobilized on surface of the amine functionalized silica support in scCO₂
media. Silica-based catalyst (SiO₂-ThiophPd(II)) were characterized by
IR, SEM, XRF, and BET analyses. The catalytic activity of the immobilized
catalyst in hydrogenation reactions of alkenes has been compared with the
homogeneous counterpart. SiO₂-ThiophPd(II) catalyst showed good
activity and reusability than homogeneous system. The best conversion in styrene hydrogenation was
obtained with TOF value as 5871 h^-1 at 370 K, 10 bar H₂
and 1500 psi total pressure. Especially, while
homogeneous counterpart has not activity in cyclohexene hydrogenation, it has
been provided 100% cyclohexane conversion with the immobilized catalyst. It has also been found
that the catalyst can be reused at least ten times without significant loss of
activity in the styrene hydrogenation

Keywords

Immobilized Pd(II) complex, Alkene Hydrogenation, Reusability

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