Ethylbenzene oxidation using cobalt oxide supported over SBA-15 and KIT-6

Oxidation of hydrocarbons is industrially important for the manufacturing of a variety of oxygenates that are commercially used in the preparation of fragrances, polymers and pharmaceuticals. Oxidation of ethylbenzene results in the formation of acetophenone, benzaldehyde, and benzoic acid. Present...

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Bibliographic Details
Published in:	Materials today : proceedings Vol. 45; pp. 3991 - 3996
Main Authors:	Unnarkat, Ashish P., Singh, Shireen, Kalan, Shubham
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-01-2021
Subjects:	Benzoic acid Cobalt oxide Ethylbenzene KIT-6 Oxidation SBA-15 Cobalt oxide Benzoic acid Ethylbenzene Oxidation KIT-6 SBA-15
Online Access:	Get full text
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Summary:	Oxidation of hydrocarbons is industrially important for the manufacturing of a variety of oxygenates that are commercially used in the preparation of fragrances, polymers and pharmaceuticals. Oxidation of ethylbenzene results in the formation of acetophenone, benzaldehyde, and benzoic acid. Present study is focused towards exploring cobalt over mesoporous silica support as catalysts for ethylbenzene oxidation with an intention to improve conversion and selectivity of products. Cobalt of different loadings (2–10%) is supported on SBA-15 and KIT-6 by wet-impregnation. The prepared catalysts were characterized by Fourier Transform Infrared (FTIR) Spectroscopy, X-Ray Diffraction (XRD), Brunauer-Emmet-Teller (BET) surface area analysis, and Scanning Electron Microscope (SEM). Catalyst’s performance were evaluated for the oxidation of ethylbenzene using 70% tert Butyl Hydrogen Peroxide (tBHP) as the oxidant and acetonitrile as the solvent. The effect of change of support and catalyst loading was studied. The reaction was performed at high value of oxidant to substrate ratio intending to form the secondary product (benzoic acid) directly in the reaction. Reaction has seen highest conversion of 37.11% with selectivity of 88% to the benzoic acid for 2% Co/SBA-15. It is observed that the catalysts with KIT- 6 as support show a higher selectivity to acetophenone than the catalysts supported on SBA-15, though the selectivity for acid remains higher in both the case.
ISSN:	2214-7853 2214-7853
DOI:	10.1016/j.matpr.2020.09.088