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2021 | OriginalPaper | Buchkapitel

ZnO/bentonite Hybrids Obtained by a Simple Method of Synthesis and Applied as Catalyst for Biodiesel Production

verfasst von : Ana Flávia Félix Farias, Sandro Marden Torres, Elson Longo, Maguy Jaber, Maria Gardennia Fonseca, Liliana Fátima Bezerra Lira Pontes, Ieda Maria Garcia dos Santos

Erschienen in: Functional Properties of Advanced Engineering Materials and Biomolecules

Verlag: Springer International Publishing

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Abstract

ZnO/bentonite hybrids were obtained by the microwave-assisted hydrothermal method, in order to change the bentonite surface and improve its activity for biodiesel production. No previous treatment of the clay was used and in situ crystallization of ZnO was done by a fast single step method. A factorial design was used to optimize synthesis conditions (e.g., reaction time, solution pH, and ZnO amount). The hybrids were fully characterized to determine its structural, chemical, and morphological properties. The results demonstrated the positive contribution of the microwave-assisted hydrothermal method to the formation of ZnO/bentonite hybrids, in addition to showing that the pH was the most important parameter influencing the formation of ZnO. A pH value of 8 favored the incorporation of approximately 19.6% of ZnO onto the smectite particles even after 5 min of microwave irradiation. The ZnO/bentonite hybrid with the biggest amount of ZnO was applied as a catalyst in the transesterification reaction of soybean oil. As such, our results demonstrated an ethyl ester conversion rate higher than 73% with better performance than that of natural bentonite (44%), which represents approximately 66% of the improvement of the catalytic activity.

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Metadaten
Titel
ZnO/bentonite Hybrids Obtained by a Simple Method of Synthesis and Applied as Catalyst for Biodiesel Production
verfasst von
Ana Flávia Félix Farias
Sandro Marden Torres
Elson Longo
Maguy Jaber
Maria Gardennia Fonseca
Liliana Fátima Bezerra Lira Pontes
Ieda Maria Garcia dos Santos
Copyright-Jahr
2021
DOI
https://doi.org/10.1007/978-3-030-62226-8_1

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