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Optimization and mechanistic study of the liquid-phase oxidation of naphthalene over biomass-derived iron catalyst

Andas, Jeyashelly and Adam, Farook and Ab. Rahman, Ismail and Yap, Taufiq Yun Hin (2014) Optimization and mechanistic study of the liquid-phase oxidation of naphthalene over biomass-derived iron catalyst. Chemical Engineering Journal, 252 . pp. 382-392. ISSN 1385-8947; ESSN: 1873-3212

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Abstract

Iron supported silica catalysts were synthesized from rice husk using sol–gel route at room temperature. FT-Raman spectroscopy and XRD analysis confirmed that the iron catalysts were free from iron oxide while pyridine adsorption–desorption analysis proved the presence of both Brönsted and Lewis acid sites. NH3-TPD analysis showed the total acidity was maximum for 10 wt.% iron catalyst and declined with further incorporation of iron content. The morphology and topography of the iron catalysts changed at different iron concentration. The performance of the iron catalysts was evaluated in the liquid-phase oxidation of naphthalene with H2O2 as an oxygen source. The highest activity of 48.2% was registered over catalyst loaded with 10 wt.% Fe3+ after 4 h reaction time. Free-radical mechanism was postulated based on the GC–MS analysis. Leaching of ferric ion was minimal under the studied reaction condition. The catalyst retained its performance and stability even after four consecutive cycles.

Item Type:Article
Keyword:Iron; Rice husk; Oxidation; Naphthalene; Free-radical
Faculty or Institute:Faculty of Science
Publisher:Elsevier
DOI Number:10.1016/j.cej.2014.04.113
Altmetrics:http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.cej.2014.04.113
ID Code:34763
Deposited By: Nurul Ainie Mokhtar
Deposited On:22 Dec 2015 16:59
Last Modified:22 Dec 2015 16:59

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