Journal ArticleDOI
New trends in biodiesel production: Chemical interesterification of sunflower oil with methyl acetate
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In this article, the chemical interesterification of oil with methyl acetate using potassium hydroxide, methoxide and polyethylene glycolate as catalysts was investigated.Abstract:
In this study, the chemical interesterification of oil with methyl acetate using potassium hydroxide, methoxide and polyethylene glycolate as catalysts was investigated. The reactions were performed at 50 °C using the range methyl acetate 12 mol mol −1 of refined sunflower oil to a value of 100 mol mol −1 and the range of potassium methanolate to oil was 100–500 mmol mol −1 . The effect of methanol and water on the catalyst and reagents was to reduce the yield of triacetin, forming diacetin, monoacetin and glycerol instead. A compromise between the product yield, reaction kinetics and methyl acetate recovery was achieved with the conditions methyl acetate to oil 50 mol mol −1 and catalyst to oil 100 mmol mol −1 when potassium methoxide was used as a catalyst and the reagents were dehydrated. Under these conditions, equilibrium was reached within the first 15 min of the reaction. The mass fractions of fatty acid methyl esters (FAME) and triacetin in the product were 76.7% and 17.2%, respectively, with a mass fraction of 4.7% for the intermediate diacetinmonoglyceride. Diacetin, monoacetin and glycerol were also found at a mass fraction of 1.2%.read more
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Journal ArticleDOI
Enzymatic biodiesel: Challenges and opportunities
TL;DR: A thorough analysis of recent biotechnological progress is presented in the context of present technological challenges and future developmental opportunities aimed at bringing the enzyme costs down and improving the overall process economics towards large scale production of enzymatic biodiesel.
Journal ArticleDOI
Ultrasound assisted interesterification of waste cooking oil and methyl acetate for biodiesel and triacetin production
TL;DR: In this article, an interesterification reaction of waste cooking oil with methyl acetate using potassium methoxide as a catalyst has been carried out using ultrasonic horn (frequency of irradiation of 22-kHz and rated power of 750-W).
Journal ArticleDOI
Intensified synthesis of biodiesel using hydrodynamic cavitation reactors based on the interesterification of waste cooking oil
TL;DR: In this article, a hydrodynamic cavitation reactor has been used for the intensification of synthesis of biodiesel from waste cooking oil (WCO) based on the interesterification reaction.
Journal ArticleDOI
An overview on glycerol-free processes for the production of renewable liquid biofuels, applicable in diesel engines
Juan Calero,Diego Luna,Enrique D. Sancho,Carlos Luna,Felipa M. Bautista,Antonio A. Romero,Alejandro Posadillo,Julio Berbel,Cristóbal Verdugo-Escamilla +8 more
TL;DR: In this paper, a review of the current state of available technologies and recent information in research, production practices and engineering developed to produce alternative high-quality diesel fuel from vegetable oils, by hydrotreating of triglycerides in conventional oil refineries (green diesel) as well as those novel biofuels that integrate glycerol into their composition ( Gliperol®, DMC-Biod® and Ecodiesel®) and the respective technologies for their productions.
Journal ArticleDOI
Comparison of feedstocks and technologies for biodiesel production: An environmental and techno-economic evaluation
TL;DR: In this article, five feedstocks: palm, jatropha, microalgae, tallow and waste cooking oil were analyzed and compared using techno-economic and environmental criteria for each feedstock, technological configurations currently used in the industry were taken into account (acid catalysis, basic catalysis and cogeneration).
References
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Journal ArticleDOI
Biodiesel production : a review
Fangrui Ma,Milford A. Hanna +1 more
TL;DR: In this article, the transesterification reaction is aected by molar ratio of glycerides to alcohol, catalysts, reaction temperature, reaction time and free fatty acids and water content of oils or fats.
Journal ArticleDOI
Comparative study on lipase-catalyzed transformation of soybean oil for biodiesel production with different acyl acceptors
TL;DR: Methyl acetate, a novel acyl acceptor for biodiesel production, seems very promising for lipase-catalyzed large-scale production of biodiesel, and the by-product triacetylglycerol is an important chemical with a higher value than glycerol.
Journal ArticleDOI
New Class of Acetal Derived from Glycerin as a Biodiesel Fuel Component
TL;DR: In this paper, the results of the study of a new oxygenate synthesized from crude glycerin as a biodiesel additive were presented. And the results reveal that new acetal (2,2-dimethyl-1,3-dioxolan-4-yl)methyl acetate not only improves biodiesel viscosity but also meets the requirements established by diesel and biodiesel fuels by the European and American Standards (EN 14214 and ASTM D6751, respectively) for other important parameters, such as flash point and oxidation stability, that have not
Journal ArticleDOI
Comparison of oxidative stability of high- and normal-oleic peanut oils
TL;DR: In this paper, a peanut breeding line with high-oleic acid and an isogenic sister line with normal fatty acid composition were obtained and the oxidative stability of the oils was measured by the Schall oven test (80°C), active oxygen method (AOM) and by comparison of oxidation rates on thin-layer chromatography-flame ionization detector (TLC-FID) rods (100°C).
Journal ArticleDOI
A novel enzymatic route for biodiesel production from renewable oils in a solvent-free medium.
TL;DR: A new enzymatic route for biodiesel production from soybean oil was developed using methyl acetate as a novel acyl acceptor and the by-product triacetylglycerol showed no negative effect on the fuel property.
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