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Promoting effect of Al on tethered ligand-modified Rh/SiO2 catalysts for ethylene hydroformylation

Paper ID Volume ID Publish Year Pages File Format Full-Text
39222 45813 2015 6 PDF Available
Title
Promoting effect of Al on tethered ligand-modified Rh/SiO2 catalysts for ethylene hydroformylation
Abstract

•A new catalyst was prepared by doping Al to a tethered phosphine modified Rh/SiO2.•The activity of the catalyst was increased about 4-fold after Al doping.•Al enhances the number of exposed Rh atoms and the amount of active species.•Al changes the acidity of the surface and interacts with the tethered phosphine.

A Rh/SiO2 catalyst with excellent activity and stability for ethylene hydroformylation was developed by modifying with tethered diphenylphosphinopropyl and doped with an Al promoter. The catalyst was characterized by means of N2 adsorption/desorption isotherms, transmission electron microscope, NH3 temperature programmed desorption, Fourier transform infrared spectroscopy and solid-state nuclear magnetic resonance. Experimental results showed that the existence of the Al promoter inhibited the growth of Rh particles, increased the number of exposed Rh atoms, changed the acidity of the catalyst surface, promoted in situ formation of active species that were similar to their corresponding homogeneous counterparts, and enhanced electron density of the P atom in the phosphine ligand.

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Keywords
Rhodium; Al; Tethered phosphine; Ethylene; Hydrofromylation
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Promoting effect of Al on tethered ligand-modified Rh/SiO2 catalysts for ethylene hydroformylation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 492, 25 February 2015, Pages 127–132
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
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