Continuous production of soybean biodiesel with compressed ethanol in a microtube reactor using carbon dioxide as co-solvent

Trentin, Cláudia M.; Lima, Ana Paula de; Alkimim, Isabela P.; Silva, Camila da; Castilhos, Fernanda de; Mazutti, Márcio A.; Oliveira, J. Vladimir

doi:10.1016/j.fuproc.2010.12.016

Cited by 43 publications

(18 citation statements)

References 38 publications

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“…When the pressure was slightly higher than the critical pressure of ethanol (~6.4 MPa), the yield was lower than at high pressure for both pressures. The best FAEE yields were obtained for the reaction at 20 MPa, consistent with the results reported in the literature for supercritical transesterification of vegetable oils in continuous mode (Minami and Saka, 2006;Silva et al, 2010;Trentin et al, 2011).…”

Section: Effect Of Pressuresupporting

confidence: 90%

“…Tan et al (2010) reported for a transesterification reaction carried out at 633 K, an oil:methanol molar ratio of 1:30 and 20 min of reaction time with n-heptane as the cosolvent that the ester yield increased from 50% to 65% at n-heptane:methanol molar ratios of 0.05 and 0.20, respectively. Trentin et al (2011) evaluated the addition of carbon dioxide on the reaction medium of transesterification under supercritical conditions carried out in a microtube reactor. The results showed that FAEE yields increased with increased addition of carbon dioxide to the system, and the highest yields were obtained at a cosolvent:substrate mass ratio of 0.2:1 in the reaction medium.…”

Section: Effect Of Cosolvent Additionmentioning

confidence: 99%

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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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Section: Effect Of Pressuresupporting

confidence: 90%

Section: Effect Of Cosolvent Additionmentioning

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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“…It is suggested that the addition of CO 2 to the reaction system will not only reduce the reaction mixture critical point but also enable its easy separation from the products. Trentin et al [165] reported that increasing CO 2 concentration in the reaction system promoted the transesterification reaction between soybean oil and ethanol; thus, increasing the biodiesel yield. The transesterification reaction performed in a stainless steel microtube reactor indicated that the smaller internal space in the micro reactor and high surface area-to-volume ratio enhanced the mass and heat transfer.…”

Section: Supercritical Methodsmentioning

confidence: 99%

A review on recent advancement in catalytic materials for biodiesel production

Avhad

Marchetti

2015

Renewable and Sustainable Energy Reviews

322

130

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“…8 Cosolvents can be used in both homogeneously 9,10 and heterogeneously 9,11 catalyzed transesterification reactions, as well as in supercritical transesterifications. 12 Some cosolvents (diethyl ether, dioxane and methyl ethyl ketone), which promote the homogeneous KOH-catalyzed methanolysis of sunflower oil, inhibit heterogeneous CaO-catalyzed methanolysis. 9 It could be expected that different cosolvents affect CaO-based catalysts differently, as observed in the methanolysis of palm oil over a river snail shells-derived CaO catalyst.…”

Section: Introductionmentioning

confidence: 99%

Influence of various cosolvents on the calcium oxide-catalyzed ethanolysis of sunflower oil

Đokić-Stojanović

Todorović²,

Troter³

et al. 2019

JSCS

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Ten organic solvents (triethanolamine, diethanolamine, ethylene glycol, methyl ethyl ketone, n-hexane, triethylamine, ethylene glycol dimethyl ether, glycerol, tetrahydrofuran and dioxane) were applied as cosolvents in the CaO-catalyzed ethanolysis of sunflower oil performed in a batch stirred reactor under the following reaction conditions: temperature 70 °C, ethanol-to-oil mole ratio 12:1, initial catalyst concentration 1.374 mol•L-1 and amount of cosolvent 20 % based on the oil amount. The main goals were to assess the effect of the used cosolvents on the synthesis of fatty acid ethyl esters (FAEE) and to select the most efficient one with respect to the final FAEE content, reaction duration and safety profile. In the absence of any cosolvent, the reaction was rather slow, providing a FAEE content of only 89.7±1.7 % after 4 h. Of the tested cosolvents, diethanolamine, triethanolamine and ethylene glycol significantly accelerated the ethanolysis reaction, whereby the last two provided a final FAEE content of 93.1±2.1 and 94.1±1.5 %, respectively, within 0.5 h. However, because of its safety profile, triethanolamine was selected as the best cosolvent for the ethanolysis of sunflower oil catalyzed by calcined CaO.

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Continuous production of soybean biodiesel with compressed ethanol in a microtube reactor using carbon dioxide as co-solvent

Cited by 43 publications

References 38 publications

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

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

A review on recent advancement in catalytic materials for biodiesel production

Influence of various cosolvents on the calcium oxide-catalyzed ethanolysis of sunflower oil

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