Influence of carbonation and rehydration on CAO derived from calcining chicken eggshells in the catalytic process of soybean oil transesterification

CaO is the most used heterogeneous catalyst in transesterification reactions due to its high catalytic activity, low solubility in methanol, non-toxicity, and low cost. One of the greatest disadvantages of using CaO is its predisposition to react with H2O and CO2 present in the atmosphere forming...

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Principais autores: Cordeiro, D. O., Silva, J. E., Oliveira, A. A. S., Batista, W. G. S., Barros Neto, Eduardo Lins de
Formato: article
Idioma:English
Publicado em: Associação Brasileira de Petróleo e Gás
Assuntos:
Biodiesel
Heterogeneous catalysts
Calcium oxide
Rehydration
Carbonation
Endereço do item:https://repositorio.ufrn.br/handle/123456789/38944
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spelling ri-123456789-389442021-09-27T13:51:48Z Influence of carbonation and rehydration on CAO derived from calcining chicken eggshells in the catalytic process of soybean oil transesterification Cordeiro, D. O. Silva, J. E. Oliveira, A. A. S. Batista, W. G. S. Barros Neto, Eduardo Lins de Biodiesel Heterogeneous catalysts Calcium oxide Rehydration Carbonation CaO is the most used heterogeneous catalyst in transesterification reactions due to its high catalytic activity, low solubility in methanol, non-toxicity, and low cost. One of the greatest disadvantages of using CaO is its predisposition to react with H2O and CO2 present in the atmosphere forming Ca(OH)2 and CaCO3, respectively. Therefore, the objective of this study is to investigate the catalytic capacity of the catalyst derived from calcined chicken eggshells on different days after calcination. The catalyst used was produced under a temperature of 800 °C during a period of 160 minutes. The catalytic solid was characterized on days 1, 2, 3, 4, and 15 after calcination by X-ray fluorescence (XRF), X-ray diffraction (XRD); thermogravimetric analysis (TGA); transmission electron microscopy (TEM); Brunauer, Emmett, and Teller isotherm (BET); and Hammett analysis techniques. The reaction occurred at a temperature of 65 °C, had a molar ratio of 12:1 alcohol/oil, used 6% catalyst, and was carried over a period of 3 hours. The results showed that the rehydration and carbonation processes did not significantly affect the CaO CaO is the most used heterogeneous catalyst in transesterification reactions due to its high catalytic activity, low solubility in methanol, non-toxicity, and low cost. One of the greatest disadvantages of using CaO is its predisposition to react with H2O and CO2 present in the atmosphere forming Ca(OH)2 and CaCO3, respectively. Therefore, the objective of this study is to investigate the catalytic capacity of the catalyst derived from calcined chicken eggshells on different days after calcination. The catalyst used was produced under a temperature of 800 °C during a period of 160 minutes. The catalytic solid was characterized on days 1, 2, 3, 4, and 15 after calcination by X-ray fluorescence (XRF), X-ray diffraction (XRD); thermogravimetric analysis (TGA); transmission electron microscopy (TEM); Brunauer, Emmett, and Teller isotherm (BET); and Hammett analysis techniques. The reaction occurred at a temperature of 65 °C, had a molar ratio of 12:1 alcohol/oil, used 6% catalyst, and was carried over a period of 3 hours. The results showed that the rehydration and carbonation processes did not significantly affect the CaO 2021-09-27T13:51:48Z 2021-09-27T13:51:48Z 2019-04-03 article CORDEIRO, D. O. ; SILVA, J. E. ; OLIVEIRA, A. A. S. ; BATISTA, W. G. S. ; BARROS NETO, E. L. . INFLUENCE OF CARBONATION AND REHYDRATION ON CAO DERIVED FROM CALCINING CHICKEN EGGSHELLS IN THE CATALYTIC PROCESS OF SOYBEAN OIL TRANSESTERIFICATION. BRAZILIAN JOURNAL OF PETROLEUM AND GAS, v. 13, p. 21-37, 2019. Disponível em: file:///C:/Users/tadeu/Downloads/InfluenceOfCarbonation_BARROSNETO_2019.pdf. Acesso em: 31 mai. 2021. http://dx.doi.org/10.5419/bjpg2019-0003 1982-0593 https://repositorio.ufrn.br/handle/123456789/38944 10.5419/bjpg2019-0003 en application/pdf Associação Brasileira de Petróleo e Gás
institution Repositório Institucional
collection RI - UFRN
language English
topic Biodiesel
Heterogeneous catalysts
Calcium oxide
Rehydration
Carbonation
spellingShingle Biodiesel
Heterogeneous catalysts
Calcium oxide
Rehydration
Carbonation
Cordeiro, D. O.
Silva, J. E.
Oliveira, A. A. S.
Batista, W. G. S.
Barros Neto, Eduardo Lins de
Influence of carbonation and rehydration on CAO derived from calcining chicken eggshells in the catalytic process of soybean oil transesterification
description CaO is the most used heterogeneous catalyst in transesterification reactions due to its high catalytic activity, low solubility in methanol, non-toxicity, and low cost. One of the greatest disadvantages of using CaO is its predisposition to react with H2O and CO2 present in the atmosphere forming Ca(OH)2 and CaCO3, respectively. Therefore, the objective of this study is to investigate the catalytic capacity of the catalyst derived from calcined chicken eggshells on different days after calcination. The catalyst used was produced under a temperature of 800 °C during a period of 160 minutes. The catalytic solid was characterized on days 1, 2, 3, 4, and 15 after calcination by X-ray fluorescence (XRF), X-ray diffraction (XRD); thermogravimetric analysis (TGA); transmission electron microscopy (TEM); Brunauer, Emmett, and Teller isotherm (BET); and Hammett analysis techniques. The reaction occurred at a temperature of 65 °C, had a molar ratio of 12:1 alcohol/oil, used 6% catalyst, and was carried over a period of 3 hours. The results showed that the rehydration and carbonation processes did not significantly affect the CaO
format article
author Cordeiro, D. O.
Silva, J. E.
Oliveira, A. A. S.
Batista, W. G. S.
Barros Neto, Eduardo Lins de
author_facet Cordeiro, D. O.
Silva, J. E.
Oliveira, A. A. S.
Batista, W. G. S.
Barros Neto, Eduardo Lins de
author_sort Cordeiro, D. O.
title Influence of carbonation and rehydration on CAO derived from calcining chicken eggshells in the catalytic process of soybean oil transesterification
title_short Influence of carbonation and rehydration on CAO derived from calcining chicken eggshells in the catalytic process of soybean oil transesterification
title_full Influence of carbonation and rehydration on CAO derived from calcining chicken eggshells in the catalytic process of soybean oil transesterification
title_fullStr Influence of carbonation and rehydration on CAO derived from calcining chicken eggshells in the catalytic process of soybean oil transesterification
title_full_unstemmed Influence of carbonation and rehydration on CAO derived from calcining chicken eggshells in the catalytic process of soybean oil transesterification
title_sort influence of carbonation and rehydration on cao derived from calcining chicken eggshells in the catalytic process of soybean oil transesterification
publisher Associação Brasileira de Petróleo e Gás
publishDate 2021
url https://repositorio.ufrn.br/handle/123456789/38944
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