Title: Total oxidation of toluene over gold supported on mesoporous ferrisilicates materials

Authors: Faiha Benais-Hamidi; Leïla Chérif-Aouali; Stéphane Siffert; Renaud Cousin; Abdelkader Bengueddach

Addresses: Laboratoire de Catalyse et Synthèse en Chimie Organique, Université de Tlemcen, BP 119, Algeria ' Laboratoire de Catalyse et Synthèse en Chimie Organique, Université de Tlemcen, BP 119, Algeria ' ULCO, UCEIV (EA-4492), F-59140 Dunkerque, France ' ULCO, UCEIV (EA-4492), F-59140 Dunkerque, France ' Laboratoire de Chimie des Matériaux, Université d'Oran, Algeria

Abstract: Mesoporous ferrisilicates MFS-n (n = Si /Fe) with different Si/Fe molar ratio (Si/Fe = 20, 135) were synthesised by the assembly of Fe MFI nanoclusters with triblock copolymers in strongly acidic media. Au/MFS-n catalysts were prepared by deposition-precipitation with urea (DPU) with a loading of gold of 1 wt%. They were characterised by various techniques including XRD, BET, FT-IR spectroscopy; diffuse reflectance UV-vis (DRUV-vis), TPR. Total oxidation of toluene was investigated on MFS-n and Au/MFS-n. The catalytic activity of MFS-n materials for total toluene oxidation is considerably enhanced as the iron content increases. The presence of gold improves the catalytic activity of MFS-n towards the combustion of toluene, the extent of this effect depending on the Si/Fe molar ratio. The catalysts are totally selective for CO2 and H2O.

Keywords: mesoporous ferrisilicates; gold; total oxidation; toluene; nanoclusters; nanotechnology; catalysis; iron content; combustion; silicon; molar ratio.

DOI: 10.1504/IJEP.2015.077177

International Journal of Environment and Pollution, 2015 Vol.58 No.3, pp.187 - 196

Received: 09 Mar 2015
Accepted: 13 Oct 2015

Published online: 17 Jun 2016 *

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