The Effect of Water on the Transesterification Kinetics of Cotton Seed Oil with Ethanol

Bikou, Elena; Louloudi, Argiro; Papayannakos, N.

doi:10.1002/(sici)1521-4125(199901)22:1<70::aid-ceat70>3.0.co;2-0

Cited by 44 publications

(26 citation statements)

References 7 publications

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“…The first sequence describes the main part of the process -namely methanolysis of TG to methyl esters, the second describes the side reaction -saponification of glycerides and methyl esters by the catalyst to potassium soaps. The reaction scheme is expressed by the stoichiometric equations (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12). In the equations following abbreviations are used: OH = OH -, X = CH 3 O -, DG -= anions of DG, generally CH 2 OCOR 1 .CHOCOR 2 .CH 2 O -or CH 2 OCOR 2 .CHOCOR 1 .…”

Section: Presumed Model Of the Reaction Of Rapeseed Oil And The Solutmentioning

confidence: 99%

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Kinetics and mechanism of the KOH — catalyzed methanolysis of rapeseed oil for biodiesel production

Komers

Skopal

Stloukal

et al. 2002

Eur. J. Lipid Sci. Technol.

128

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Kinetics and mechanism of the KOHcatalyzed methanolysis of rapeseed oil for biodiesel productionThe reaction of rapeseed oil with methanol catalyzed by KOH is described by a model consisting of two sequences of consecutive competitive reactions. The first sequence expresses the methanolysis of rapeseed oil to methyl esters (biodiesel) whereas the second sequence describes the always present side reaction-saponification of glycerides and methyl esters by KOH. The proposed chemical model is described (after rational simplifications) by a system of differential kinetic equations which are solved numerically by two independent computing methods. The thus obtained theoretical kinetic and equilibrium results are compared numerically and/or graphically with the experimental parameters. The latter were obtained by the determination of the relevant components in the actual reaction mixture by analytical methods. According to the experimental results, the proposed reaction scheme is fulfilled with the probability of ca. 78%. The optimal average rate constants and equilibrium constants of individual reaction steps of the discussed scheme are introduced. The limitations of the proposed reaction model are discussed.

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Section: Presumed Model Of the Reaction Of Rapeseed Oil And The Solutmentioning

confidence: 99%

“…Mittelbach and Trathnigg [6] studied the kinetics of methanolysis of sunflower oil catalyzed with KOH. Bikou et al [7] described the effect of water on the kinetics of cotton oil ethanolysis catalyzed by KOH. In this study [8] the kinetics of the non-catalytic methanolysis of soybean oil at 220 and 230 °C are discussed.…”

Section: Introductionmentioning

confidence: 99%

Kinetics and mechanism of the KOH — catalyzed methanolysis of rapeseed oil for biodiesel production

Komers

Skopal

Stloukal

et al. 2002

Eur. J. Lipid Sci. Technol.

128

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“…that is currently Several kinetic studies have been published on transesterification process [10,11,[14][15][16]. The model proposed by Noureddini and Zhu is the most common used, but shows some weaknesses: it does not take into account side reactions that occur like the effect of saponification and water [12,17,18]. In order to overcome these simplifications, some aspects of the model proposed by Komers are included in our model [11,12].…”

Section: Experimental Procedures Materialsmentioning

confidence: 99%

Transesterification of Various Bio-oils: Application and Perspectives in Burkina Faso

Sido-Pabyam¹,

N’Tsoukpoe²,

Blin³

et al. 2015

J Pet Environ Biotechnol

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The aim of this paper is to study and analyze the possibility of adapting the production of biodiesel in West African countries, in agreement with required standards, using local vegetable oils, for particular use in rural or remote regions. To achieve this study, an original approach based on Komers and Nourreddini theories is proposed, in order to identify the optimal conditions and parameters to produce high quality of biodiesel. Then, a pilot of transesterification is developed. The optimums obtained from theoretical simulations are used to synthetize biodiesels of various vegetable oils. Quantification in order to estimate the transesterification yield and the performance of the pilot is done. Different analytical methods for biodiesel characterization are used to determine main fuel properties including viscosity, density, water content, etc. The obtained values are then compared with international standards. This quality control is completed with gas chromatography for the quantification of tri-, di-, monoglycerides, free and total glycerol, which compose the final mixture of the various biodiesels produced. Good correlation between the results obtained and international standards values are found.

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“…The transesterification reaction is sensitive to water [10][11][12][13][14] but this is not normally a problem since oils, such as would be obtained by hexane extraction, normally contain little water. When the entire processes is analyzed for cost and energy expenditure, some current projections suggest that the energy spent in the cultivation, harvest, and extraction of oil from algae could be greater than that gained from the product [5] along with the possibility of significant environmental impact [15].…”

Section: Introductionmentioning

confidence: 99%

Biofuel from Algae: Is it a Viable Alternative?

2016

Advances in Biofuel Production

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Some microalgae are particularly attractive as a renewable feedstock for biodiesel production due to their rapid growth, high content of triacylglycerols, and ability to be grown on non-arable land. Unfortunately, obtaining oil from algae is currently cost prohibitive in part due to the need to pump and process large volumes of dilute algal suspensions. In an effort to circumvent this problem, we have explored the use of anion exchange resins for simplifying the processing of algae to biofuel. Anion exchange resins can bind and accumulate the algal cells out of suspension to form a dewatered concentrate. Treatment of the resin-bound algae with sulfuric acid/methanol elutes the algae and regenerates the resin while converting algal lipids to biodiesel. Hydrophobic polymers can remove biodiesel from the sulfuric acid/methanol, allowing the transesterification reagent to be reused. We show that in situ transesterification of algal lipids can efficiently convert algal lipids to fatty acid methyl esters while allowing the resin and transesterification reagent to be recycled numerous times without loss of effectiveness.

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The Effect of Water on the Transesterification Kinetics of Cotton Seed Oil with Ethanol

Cited by 44 publications

References 7 publications

Kinetics and mechanism of the KOH — catalyzed methanolysis of rapeseed oil for biodiesel production

Kinetics and mechanism of the KOH — catalyzed methanolysis of rapeseed oil for biodiesel production

Transesterification of Various Bio-oils: Application and Perspectives in Burkina Faso

Biofuel from Algae: Is it a Viable Alternative?

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