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Ultrasound-assisted transesterification of soybean oil using low power and high frequency and no external heating source
In this work, high frequency and low power ultrasound without external heating source and mechanical stirring in biodiesel production were studied. Transesterification of soybean oil with methanol and catalyzed by KOH was investigated using ultrasound equipment and ultrasonic transducer. The effect...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8384912/ https://www.ncbi.nlm.nih.gov/pubmed/34419864 http://dx.doi.org/10.1016/j.ultsonch.2021.105709 |
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author | Oliveira, Pâmella A. Baesso, Raphaela M. Morais, Gabriel C. Alvarenga, André V. Costa-Félix, Rodrigo P.B. |
author_facet | Oliveira, Pâmella A. Baesso, Raphaela M. Morais, Gabriel C. Alvarenga, André V. Costa-Félix, Rodrigo P.B. |
author_sort | Oliveira, Pâmella A. |
collection | PubMed |
description | In this work, high frequency and low power ultrasound without external heating source and mechanical stirring in biodiesel production were studied. Transesterification of soybean oil with methanol and catalyzed by KOH was investigated using ultrasound equipment and ultrasonic transducer. The effect of ultrasonic output power (3 W–9 W), ultrasonic frequency (1 MHz and 3 MHz), and alcohol to oil molar ratio (6:1 and 8:1) have been investigated. The increase in ultrasonic power provided higher conversion rates. In addition, higher conversion rates were obtained by increasing the ultrasonic frequency from 1 MHz to 3 MHz (48.7% to 79.5%) for the same reaction time. Results also indicate that the speed of sound can be used to evaluate the produced biodiesel qualitatively. Further, the ultrasound system presented electric consumption (46.2 W∙h) four times lower than achieved using the conventional method (211.7 W∙h and 212.3 W∙h). Thus, biodiesel production using low power ultrasound in the MHz frequency range is a promising technology that could contribute to biodiesel production processes. |
format | Online Article Text |
id | pubmed-8384912 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-83849122021-08-30 Ultrasound-assisted transesterification of soybean oil using low power and high frequency and no external heating source Oliveira, Pâmella A. Baesso, Raphaela M. Morais, Gabriel C. Alvarenga, André V. Costa-Félix, Rodrigo P.B. Ultrason Sonochem Ultrasonics Sonochemistry in Latin America In this work, high frequency and low power ultrasound without external heating source and mechanical stirring in biodiesel production were studied. Transesterification of soybean oil with methanol and catalyzed by KOH was investigated using ultrasound equipment and ultrasonic transducer. The effect of ultrasonic output power (3 W–9 W), ultrasonic frequency (1 MHz and 3 MHz), and alcohol to oil molar ratio (6:1 and 8:1) have been investigated. The increase in ultrasonic power provided higher conversion rates. In addition, higher conversion rates were obtained by increasing the ultrasonic frequency from 1 MHz to 3 MHz (48.7% to 79.5%) for the same reaction time. Results also indicate that the speed of sound can be used to evaluate the produced biodiesel qualitatively. Further, the ultrasound system presented electric consumption (46.2 W∙h) four times lower than achieved using the conventional method (211.7 W∙h and 212.3 W∙h). Thus, biodiesel production using low power ultrasound in the MHz frequency range is a promising technology that could contribute to biodiesel production processes. Elsevier 2021-08-19 /pmc/articles/PMC8384912/ /pubmed/34419864 http://dx.doi.org/10.1016/j.ultsonch.2021.105709 Text en © 2021 The Author(s) https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Ultrasonics Sonochemistry in Latin America Oliveira, Pâmella A. Baesso, Raphaela M. Morais, Gabriel C. Alvarenga, André V. Costa-Félix, Rodrigo P.B. Ultrasound-assisted transesterification of soybean oil using low power and high frequency and no external heating source |
title | Ultrasound-assisted transesterification of soybean oil using low power and high frequency and no external heating source |
title_full | Ultrasound-assisted transesterification of soybean oil using low power and high frequency and no external heating source |
title_fullStr | Ultrasound-assisted transesterification of soybean oil using low power and high frequency and no external heating source |
title_full_unstemmed | Ultrasound-assisted transesterification of soybean oil using low power and high frequency and no external heating source |
title_short | Ultrasound-assisted transesterification of soybean oil using low power and high frequency and no external heating source |
title_sort | ultrasound-assisted transesterification of soybean oil using low power and high frequency and no external heating source |
topic | Ultrasonics Sonochemistry in Latin America |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8384912/ https://www.ncbi.nlm.nih.gov/pubmed/34419864 http://dx.doi.org/10.1016/j.ultsonch.2021.105709 |
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