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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.
Afiliação
  • Oliveira PA; Laboratory of Ultrasound, National Institute of Metrology, Quality, and Technology (Inmetro), 25250-020 Duque de Caxias, RJ, Brazil.
  • Baesso RM; Laboratory of Ultrasound, National Institute of Metrology, Quality, and Technology (Inmetro), 25250-020 Duque de Caxias, RJ, Brazil.
  • Morais GC; Laboratory of Ultrasound, National Institute of Metrology, Quality, and Technology (Inmetro), 25250-020 Duque de Caxias, RJ, Brazil.
  • Alvarenga AV; Laboratory of Ultrasound, National Institute of Metrology, Quality, and Technology (Inmetro), 25250-020 Duque de Caxias, RJ, Brazil. Electronic address: avalvarenga@inmetro.gov.br.
  • Costa-Félix RPB; Laboratory of Ultrasound, National Institute of Metrology, Quality, and Technology (Inmetro), 25250-020 Duque de Caxias, RJ, Brazil. Electronic address: rpfelix@inmetro.gov.br.
Ultrason Sonochem ; 78: 105709, 2021 Oct.
Article em En | MEDLINE | ID: mdl-34419864
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 (46.2W∙h) four times lower than achieved using the conventional method (211.7W∙h and 212.3W∙h). Thus, biodiesel production using low power ultrasound in the MHz frequency range is a promising technology that could contribute to biodiesel production processes.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Óleo de Soja Idioma: En Revista: Ultrason Sonochem Assunto da revista: DIAGNOSTICO POR IMAGEM Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Óleo de Soja Idioma: En Revista: Ultrason Sonochem Assunto da revista: DIAGNOSTICO POR IMAGEM Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda