PHOTOCHEMICAL AND PHOTOCATALYTIC ESTERIFICATION OF WASTE COOKING OIL UNDER VISIBLE LIGHT IRRADIATION USING MECHANOCHEMICALLY SYNTHESIZED ZNO/SILICA

Production of biodiesel from waste cooking oils via alkali catalyzed transesterification reaction is hampered by the unacceptably high amount of free fatty acids present in waste cooking oils. Therefore, catalytic esterification of waste cooking oil with small alcohols is performed before the transe...

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Autores principales:	Oriolowo OLORUNTOBA, Abdulhamid HAMZA
Formato:	article
Lenguaje:	EN
Publicado:	Stefan cel Mare University of Suceava 2019
Materias:	Biodiesel Waste Cooking Oil Esterification Photocatalyst ZnO/silica composite Food processing and manufacture TP368-456
Acceso en línea:	https://doaj.org/article/4161465b06274ded9bfafc3caf22991a
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spelling	oai:doaj.org-article:4161465b06274ded9bfafc3caf22991a2021-12-02T18:18:26ZPHOTOCHEMICAL AND PHOTOCATALYTIC ESTERIFICATION OF WASTE COOKING OIL UNDER VISIBLE LIGHT IRRADIATION USING MECHANOCHEMICALLY SYNTHESIZED ZNO/SILICA2068-66092559-6381https://doaj.org/article/4161465b06274ded9bfafc3caf22991a2019-06-01T00:00:00Zhttp://www.fia.usv.ro/fiajournal/index.php/FENS/article/view/641/603https://doaj.org/toc/2068-6609https://doaj.org/toc/2559-6381Production of biodiesel from waste cooking oils via alkali catalyzed transesterification reaction is hampered by the unacceptably high amount of free fatty acids present in waste cooking oils. Therefore, catalytic esterification of waste cooking oil with small alcohols is performed before the transesterification reaction. Herein, ZnO/silica composite was synthesized via mechanochemical route and characterized using x-ray diffraction, x-ray fluorescence spectroscopy and scanning electron microscopy. Photochemical and photocatalytic esterification of free fatty acids in a sample of waste cooking oil with methanol was performed under visible light irradiation. The efficiency of photochemical esterification was found to be strongly dependent on the intensity of the light used. Significant increase in the efficiency of the photochemical esterification was observed when synthesized ZnO/silica composite was used as photocatalyst. The photocatalytic activity of the ZnO/silica composite visible light irradiation is attributed to the impurities present in silica support. Photocatalytic esterification using ZnO/silica composite is a promising method to reduce the FFA content of waste cooking oil under ambient conditions.Oriolowo OLORUNTOBAAbdulhamid HAMZAStefan cel Mare University of SuceavaarticleBiodieselWaste Cooking OilEsterificationPhotocatalystZnO/silica compositeFood processing and manufactureTP368-456ENFood and Environment Safety, Vol 18, Iss 2, Pp 89-96 (2019)
institution	DOAJ
collection	DOAJ
language	EN
topic	Biodiesel Waste Cooking Oil Esterification Photocatalyst ZnO/silica composite Food processing and manufacture TP368-456
spellingShingle	Biodiesel Waste Cooking Oil Esterification Photocatalyst ZnO/silica composite Food processing and manufacture TP368-456 Oriolowo OLORUNTOBA Abdulhamid HAMZA PHOTOCHEMICAL AND PHOTOCATALYTIC ESTERIFICATION OF WASTE COOKING OIL UNDER VISIBLE LIGHT IRRADIATION USING MECHANOCHEMICALLY SYNTHESIZED ZNO/SILICA
description	Production of biodiesel from waste cooking oils via alkali catalyzed transesterification reaction is hampered by the unacceptably high amount of free fatty acids present in waste cooking oils. Therefore, catalytic esterification of waste cooking oil with small alcohols is performed before the transesterification reaction. Herein, ZnO/silica composite was synthesized via mechanochemical route and characterized using x-ray diffraction, x-ray fluorescence spectroscopy and scanning electron microscopy. Photochemical and photocatalytic esterification of free fatty acids in a sample of waste cooking oil with methanol was performed under visible light irradiation. The efficiency of photochemical esterification was found to be strongly dependent on the intensity of the light used. Significant increase in the efficiency of the photochemical esterification was observed when synthesized ZnO/silica composite was used as photocatalyst. The photocatalytic activity of the ZnO/silica composite visible light irradiation is attributed to the impurities present in silica support. Photocatalytic esterification using ZnO/silica composite is a promising method to reduce the FFA content of waste cooking oil under ambient conditions.
format	article
author	Oriolowo OLORUNTOBA Abdulhamid HAMZA
author_facet	Oriolowo OLORUNTOBA Abdulhamid HAMZA
author_sort	Oriolowo OLORUNTOBA
title	PHOTOCHEMICAL AND PHOTOCATALYTIC ESTERIFICATION OF WASTE COOKING OIL UNDER VISIBLE LIGHT IRRADIATION USING MECHANOCHEMICALLY SYNTHESIZED ZNO/SILICA
title_short	PHOTOCHEMICAL AND PHOTOCATALYTIC ESTERIFICATION OF WASTE COOKING OIL UNDER VISIBLE LIGHT IRRADIATION USING MECHANOCHEMICALLY SYNTHESIZED ZNO/SILICA
title_full	PHOTOCHEMICAL AND PHOTOCATALYTIC ESTERIFICATION OF WASTE COOKING OIL UNDER VISIBLE LIGHT IRRADIATION USING MECHANOCHEMICALLY SYNTHESIZED ZNO/SILICA
title_fullStr	PHOTOCHEMICAL AND PHOTOCATALYTIC ESTERIFICATION OF WASTE COOKING OIL UNDER VISIBLE LIGHT IRRADIATION USING MECHANOCHEMICALLY SYNTHESIZED ZNO/SILICA
title_full_unstemmed	PHOTOCHEMICAL AND PHOTOCATALYTIC ESTERIFICATION OF WASTE COOKING OIL UNDER VISIBLE LIGHT IRRADIATION USING MECHANOCHEMICALLY SYNTHESIZED ZNO/SILICA
title_sort	photochemical and photocatalytic esterification of waste cooking oil under visible light irradiation using mechanochemically synthesized zno/silica
publisher	Stefan cel Mare University of Suceava
publishDate	2019
url	https://doaj.org/article/4161465b06274ded9bfafc3caf22991a
work_keys_str_mv	AT oriolowooloruntoba photochemicalandphotocatalyticesterificationofwastecookingoilundervisiblelightirradiationusingmechanochemicallysynthesizedznosilica AT abdulhamidhamza photochemicalandphotocatalyticesterificationofwastecookingoilundervisiblelightirradiationusingmechanochemicallysynthesizedznosilica
_version_	1718378269442572288

PHOTOCHEMICAL AND PHOTOCATALYTIC ESTERIFICATION OF WASTE COOKING OIL UNDER VISIBLE LIGHT IRRADIATION USING MECHANOCHEMICALLY SYNTHESIZED ZNO/SILICA

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