Continuous production of fatty acid ethyl esters from sunflower oil using supercritical ethanol

Velez, Alexis; Soto, Gabriela Cynthia; Hegel, Pablo Ezequiel; Mabe, Guillermo Domingo; Pereda, Selva

doi:10.1016/j.fuel.2012.02.024

Cited by 53 publications

(40 citation statements)

References 18 publications

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“…In all cases, biodiesel yield increased with temperature. This result agrees well with the results obtained using previous supercritical biodiesel-production methods (Varma et al, 2010;Zhou et al, 2010;Biktashev et al, 2011;Velez et al, 2012;Tsai et al, 2013;Goembira and Saka, 2013). Biodiesel production in the supercritical methanol method was superior to the production in the supercritical ethanol and MTBE methods.…”

Section: Reagents and Materialssupporting

confidence: 91%

A comparative study of biodiesel production using methanol, ethanol, and tert-butyl methyl ether (MTBE) under supercritical conditions

Farobie

Matsumura

2015

Bioresource Technology

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Section: Reagents and Materialssupporting

confidence: 91%

A comparative study of biodiesel production using methanol, ethanol, and tert-butyl methyl ether (MTBE) under supercritical conditions

Farobie

Matsumura

2015

Bioresource Technology

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“…For ethanolysis of castor oil in continuous mode, Vieitez et al (2011b), under the same conditions, reported about 38 wt%, 62 wt% and 64 wt% of ethyl esters content with 0 wt%, 5 wt% and 10 wt% of water in the reaction medium, respectively. Velez et al (2012) used continuous production of FAEE from sunflower oil and reported about 75 wt% and 88 wt% of FAEE content at 593 K, 1:40 (oil:ethanol molar ratio) and 30 min of residence time with 0 wt% and 4 wt% of water, respectively. Figure 5 illustrates the effect of water addition on the decomposition of fatty acids for the reaction conditions used in Figure 4.…”

Section: Effect Of Water Additionmentioning

confidence: 99%

“…Additionally, it has been shown that the so-called supercritical method is more tolerant to the presence of water and free fatty acids (FFA) than the conventional alkali-catalyzed technique and hence more tolerant to various types of vegetable oils, which increases interest in research involving the application of this methodology. The presence of FFAs and water in the feedstocks causes three types of reactions (transesterification and hydrolysis of triglycerides, and esterification of FFA) to occur simultaneously at supercritical conditions (Kusdiana and Saka, 2004) and thus increasing the reaction yield (Vieitez et al, 2009;Vieitez et al, 2012;Velez et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Continuous catalyst-free production of esters from Jatropha curcas L. oil under supercritical ethanol

Silva

Colonelli

Silva

et al. 2014

Braz. J. Chem. Eng.

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-In the present study, the transesterification of Jatropha oil in a continuous catalyst-free process using supercritical ethanol was investigated. Experiments were performed in a packed-bed tubular reactor by studying the effect on the reaction of temperature, pressure, water and cosolvent (n-hexane) concentrations, keeping the oil:ethanol mass ratio fixed at 1:1 for different residence times. The results demonstrated that temperature and pressure had a positive effect on fatty acid ethyl ester (FAEE) production and it was observed that the free fatty acids present in vegetable oil promote faster reaction kinetics due to simultaneous esterification and transesterification reactions. The addition of water and a cosolvent increased the FAEE yields at 573 K and 20 MPa. Within the experimental ranges investigated, water and the cosolvent decreased the decomposition of fatty acids. Appreciable reaction yields (~90 wt%) were achieved at 573 K, 20 MPa, with an oil:ethanol mass ratio of 1:1 and 10 wt% water.

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“…Com essa razão Choi et al (2011), Velez et al (2012 e Vieitez et al (2012) obtiveram as melhores taxas de conversão em seus experimentos. A mistura reacional contendo o óleo e o etanol foi enviada ao reator operando a 330°C e 20 MPa (GIRARDI, 2015).…”

Section: Rota Supercríticaunclassified

Simulação E Análise Econômica Da Produção De Biodiesel a Partir De Óleo De Macaúba

Cruz¹,

Ferreira²,

Rodrigues³

2017

The Journal of Engineering and Exact Sciences

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RESUMO: Este trabalho teve por objetivo a simulação de três plantas de produção de biodiesel via transesterificação etílica, utilizando o óleo de macaúba PALAVRAS-CHAVE:Biodiesel; Macaúba; Aspen Hysys; Simulação; Análise Econômica. INTRODUÇÃOA matriz energética mundial ainda é predominantemente composta por combustíveis de origem fóssil tais como petróleo, gás natural e seus derivados, entretanto já há sinais de esgotamento das reservas desses combustíveis, o que pode gerar impactos sérios na economia mundial e também insegurança energética (SHAFIEE e TOPAL, 2009). A preocupação com o meio ambiente também se apresenta como um dos problemas ligados a este tipo de reserva, uma vez que os combustíveis fósseis são os principais responsáveis pelos gases associados às mudanças climáticas (DEMIRBAS, 2008). Dessa forma a busca por alternativas mais viáveis e menos agressivas ao meio ambiente intensificou-se e com isso os combustíveis de fontes renováveis acabaram se destacando.

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Continuous production of fatty acid ethyl esters from sunflower oil using supercritical ethanol

Cited by 53 publications

References 18 publications

A comparative study of biodiesel production using methanol, ethanol, and tert-butyl methyl ether (MTBE) under supercritical conditions

A comparative study of biodiesel production using methanol, ethanol, and tert-butyl methyl ether (MTBE) under supercritical conditions

Continuous catalyst-free production of esters from Jatropha curcas L. oil under supercritical ethanol

Simulação E Análise Econômica Da Produção De Biodiesel a Partir De Óleo De Macaúba

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