Enzymatic transesterification of Jatropha curcas oil assisted by ultrasonication

Kumar, Gajendra; Kumar, Dharmendra; Poonam, .; Johari, Rajeev; Singh, C. P.

doi:10.1016/j.ultsonch.2011.03.004

Cited by 93 publications

(46 citation statements)

References 19 publications

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“…Many interesting works using ultrasound to enhance biodiesel conversion with reaction catalyzed by enzymes are described in the literature (Waghmare et al, 2015;Lerin et al, 2014;Awadallak et al, 2013;Batistella et al, 2012;Fiametti et al, 2012;Kumar et al, 2011). However, we have not found reports that describe the ethanolysis of Jatropha curcas oil under ultrasound irradiation.…”

Section: Introductionmentioning

confidence: 83%

“…Soumanou et al (2012) tested different immobilized enzymes for alcoholysis of Jatropha curcas oil and achieved the highest conversion (93%) using immobilized Pseudomonas cepacia lipases on Accurel 1282 after 16 h, whereas the lowest conversion was found with Novozym 435. A study of Jatropha curcas oil methanolysis in ultrasound showed 84.5% conversion of methyl esters using immobilized Enterobacter aerogenes lipase on silica, molar ratio oil to methanol 1:4, reaction time 30 min, ultrasonic amplitude 50% (100 W/m 3 ) and cycle 0.7 s (Kumar et al, 2011).…”

Section: Kinetic Study: Effect Of Enzyme Concentrationmentioning

confidence: 99%

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Lipase-catalyzed ethanolysis of Jatropha curcas L. oil assisted by ultrasonication

Lerin

Remonatto

Pereira

et al. 2017

Braz. J. Chem. Eng.

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-Transesterification of non-edible oils using immobilized lipase is a promising process for biodiesel production. Thus, this study aimed to evaluate the enzymatic transesterification of the non-edible Jatropha curcas oil for FAEE production under ultrasound irradiation in a solvent-free system. The effects of enzyme concentration, water concentration, molar ratio of ethanol to oil and ultrasound power on the FAEE conversion have been evaluated. The results show that enzyme concentration and irradiation power have a positive significant effect on FAEE conversion, where an increase in these variables leads to higher conversions. Conversion above 54% of FAEE was achieved with 1.5 hours of reaction time using ultrasound irradiation, reducing reaction time by at least 3 times, when compared with the same experimental conditions without ultrasound irradiation. Results showed that ultrasound can improve reaction conversion mainly by enhancing the mass transfer between the constituents of the reactions.

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Section: Introductionmentioning

confidence: 83%

Section: Kinetic Study: Effect Of Enzyme Concentrationmentioning

confidence: 99%

Lipase-catalyzed ethanolysis of Jatropha curcas L. oil assisted by ultrasonication

Lerin

Remonatto

Pereira

et al. 2017

Braz. J. Chem. Eng.

View full text Add to dashboard Cite

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“…On the other hand, enzymatic transesterification requires a longer reaction time and a great amount of catalyst; the enzymes are expensive and can be inhibited by the glycerol during the process [32]. It has been demonstrated that the use of ultrasound improves the effectiveness of enzymatic transesterification, resulting in a shorter reaction time, but with a very high energy cost [33].…”

Section: Influence Of the Reaction Timementioning

confidence: 99%

Biodiesel Production from Waste Frying Oil by Ultrasound‐Assisted Transesterification

et al. 2017

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The production of biodiesel as renewable, easily biodegradable, and nontoxic alternative to fossil fuels is expensive when it is derived from virgin vegetable oils. In this study, waste frying oil was used to produce biodiesel by ultrasound-assisted transesterification. The reaction was carried out with methanol, and sodium hydroxide was used as catalyst. This method is an efficient, timesaving, and economically functional tool since the process can be carried out in a shorter reaction time, at lower temperature, and with a lower quantity of catalysts compared to other techniques. The biodiesel produced by this method was analyzed for its fatty acid methyl ester composition, density, moisture and volatile matter content, acid value, saponification value, iodine value, distillation curves, and cetane number.

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“…Several authors have reported processes in batch reactors [29][30][31][32] and have described a significant promoting effect that enables lower catalyst and alcohol loading to be used in transesterification [33][34][35]. Under sonochemical conditions a reaction normally takes place at low or ambient temperature [3,36,37].…”

Section: Biodiesel Production Using Usmentioning

confidence: 99%

Combined Enabling Technologies for Biodiesel Production in Flow Processes

Cravotto

Choedkiatsakul

2014

Production of Biofuels and Chemicals With Microwave

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Alternative energy sources and fuels have been investigated to indemnify the higher demand of natural fuels that requires very long time for their formation. In the last 40 years several renewable energy sources have been developed. In this context biodiesel play an important role because its high heating values nearly equivalent to diesel fuels and its low environmental impact. The sustainability of the process is strongly related to the type of oil source and to the overall energy consumption. The aim of this chapter is to highlight the synergistic effects on process efficiency by combining different activation techniques such as microwaves, ultrasound, hydrodynamic cavitation and high-shear mixing. A big effort has been done in the search of new highly efficient reactors to produce biodiesel saving time and energy. Inefficient mass transfer is one of the main limitations in biphasic heterogeneous reactions such as transesterification. Although many types of vigorous mixing have been investigated to address this requirement, most of them suffer of high energy demand. The dielectric heating has been proved to dramatically enhance transesterification reaction because the excellent heat transfer if compared with conventional methods. Thanks to an optimal mass/heat transfer a full triglycerides conversion to methyl esters can be achieved in flow reactors in a very short time either in continuous or semi-continuous mode. Moreover, in accordance with international specifications and analytical ASTM standards, very fast treatments may produce a high-quality biodiesel. The high efficiency and the low energy consumption enable an easy scale up of the process.

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Enzymatic transesterification of Jatropha curcas oil assisted by ultrasonication

Cited by 93 publications

References 19 publications

Lipase-catalyzed ethanolysis of Jatropha curcas L. oil assisted by ultrasonication

Lipase-catalyzed ethanolysis of Jatropha curcas L. oil assisted by ultrasonication

Biodiesel Production from Waste Frying Oil by Ultrasound‐Assisted Transesterification

Combined Enabling Technologies for Biodiesel Production in Flow Processes

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