eCite Digital Repository

Selective hydrogenation of phenylacetylene on Ni and Ni-Pd catalysts modified with heteropoly compounds of the Keggin type

Citation

Navalikhina, MD and Kavalerskaya, NE and Lokteva, ES and Peristyy, AA and Golubina, EV and Lunin, VV, Selective hydrogenation of phenylacetylene on Ni and Ni-Pd catalysts modified with heteropoly compounds of the Keggin type, Russian Journal of Physical Chemistry A, 86, (12) pp. 1800-1807. ISSN 0036-0244 (2012) [Refereed Article]

Copyright Statement

Copyright 2012 Pleiades Publishing, Ltd

DOI: doi:10.1134/S0036024412120187

Abstract

It is established that unmodified Ni catalysts and Ni catalysts modified with Mo- and W-heteropoly compounds (HPC) of the Keggin type (6 wt %) along with catalyst containing 6% K4SiW12O40/Al2O3 appear to be active in the reaction of phenylacetylene (PA) hydrogenation. At low temperatures (100150C), the selectivity of the process strongly depends on the nature of the modifier or second active metal (Pd). It is demonstrated that in the presence of 6% Ni-0.015% Pd/Al2O3 modified by HPC K4SiMo6W6O40, the conversion of PA at 100C was 87% at a styrene: ethylbenzene ratio of 1: 1. The acidity of HPC is found to influence the side reactions of alkylation and condensation. Transmission electron microscopy demonstrates that Ni in modified HPC 6% Ni/Al2O3 is present in the form of the particles below 2 nm in size, and these particles of Ni become larger when affected by the reaction medium during PA hydrogenation.

Item Details

Item Type:Refereed Article
Keywords:Ni and NiPd catalysts, selective hydrogenation, phenylacetylene, modification of the support, heteropoly compound
Research Division:Chemical Sciences
Research Group:Physical Chemistry (incl. Structural)
Research Field:Catalysis and Mechanisms of Reactions
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Peristyy, AA (Dr Anton Peristyy)
ID Code:104585
Year Published:2012
Web of Science® Times Cited:5
Deposited By:Chemistry
Deposited On:2015-11-16
Last Modified:2017-11-02
Downloads:0

Repository Staff Only: item control page