Alkaline Transesterification
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. MACROALGAE Fucus vesiculosus OIL: BIODIESEL PRODUCTION USING ALKALINE TRANSESTERIFICATION
This work studied the obtaining of methyl biodiesel and ethyl biodiesel using alkaline transesterification from macroalgae Fucus vesiculosos oil (FVO). FVO has 86.59% of its composition in unsaturated fatty acids, with a greater quantity of linoleic acid and oleic acid, a chemical composition near the soybean oil, the most used raw material for the productio
Quím. Nova. Publicado em: 2021-04
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2. High Conversion of Palm Olein to Ethyl Esters Using a Strong Anion Exchange Resin: Study of the Operational Parameters
Biodiesel, known as a mixture of fatty acid ethyl/methyl esters, is seen as an alternative, ecofriendly, biodegradable and renewable non-fossil fuel. The use of heterogeneous catalysts for biodiesel synthesis can solve several problems associated with the homogeneous alkaline catalyzed-transesterification. Therefore, this work reports the evaluation of the c
J. Braz. Chem. Soc.. Publicado em: 2020-07
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3. RE-ESTERIFICATION OF MACAUBA ACID OIL USING GLYCEROL FOR ACIDITY REDUCTION AND BIODIESEL PRODUCTION
Abstract Biodiesel production using acid oils is an important alternative for biofuel cost reduction. However, it is a huge challenge for homogeneous transesterification, the main industrial route commonly used. This paper presents macauba oil with high acidity, 43.90 w/w%, as a potential raw material for biodiesel production. The acidity was reduced to 0.8
Braz. J. Chem. Eng.. Publicado em: 09/12/2019
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4. COMPOSIÇÃO QUÍMICA E TEMPERATURA DE CRISTALIZAÇÃO DE ÉSTERES OBTIDOS DE QUATRO ÓLEOS VEGETAIS EXTRAÍDOS DE SEMENTES DE PLANTAS DO CERRADO
The seed oils from four plants (Scheelea phalerata, Butia capitata, Syagrus romanzoffiana, Terminalia cattapa) found in Mato Grosso do Sul were extracted at good yields. Alkaline transesterification of these seed oils to esters using methanol and ethanol was studied and also produced good yields. Oleic acid (30.5/32.3%), lauric acid (30.7/32.9%) methyl and e
Quím. Nova. Publicado em: 2015-03
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5. Biodiesel production through non-catalytic supercritical transesterification: current state and perspectives
The inconveniences of the conventional method for biodiesel production by alkaline catalysis suggests research towards alternative methods, with the non-catalytic transesterification using an alcohol at supercritical conditions proposed as a promising technique for biodiesel production. The so-called supercritical method (SCM) has powerful advantages over co
Braz. J. Chem. Eng.. Publicado em: 2014-06
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6. Estudo da produção de biodiesel a partir de óleo de babaçu e etanol utilizando a transesterificação alcalina tradicional com agitação mecânica e assistida por ultrassons / Evaluation of biodiesel production from babassu and ethanol applying traditional alkaline transesterification with mechanical stirring and under ultrasonic technology
Neste trabalho foram sintetizados ésteres etílicos do óleo de babaçu através da catálise alcalina em meio homogêneo. O planejamento de experimentos foi utilizado como ferramenta de otimização e também na identificação dos principais fatores que influenciam nas conversões em ésteres etílicos. As reações de transesterificação foram realizada
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/08/2010
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7. Síntese de biodiesel etílico de girassol utilizando transesterificação alcalina seguido da adição on pot de H2SO4 / Biodiesel synthesis from sunflower oil through alkaline transesterification followed on pot addition of sulfuric acid
In this study, the on pot addition of sulfuric acid was studied in the transesterification process of sunflower oil, using ethanol and methanol, by basic catalysis (NaOH or KOH). That addition implicated in successfully separation of FAEEs from FAMEs/glycerin phases due to soap breaking. The on pot additions yield free fatty acids and salt (Na2SO4 or K2SO4).
Publicado em: 2010
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8. Optimization of the biodiesel synthesis of physic nut (jatropha curcas L.), via ethanol route, and determination of its uid-dynamic parameters / Otimização da síntese etanólica do biodiesel de pinhão manso (Jatropha curcas L.) e determinação de seus parâmetros fluidodinâmicos
The most applied process for biodiesel production is the transesterification reaction based on alkaline catalysts, due to their faster kinetics and appreciable conversion rate. Then, low cost catalysts (alkaline, alkaline earth and transition metal hydroxides), are often used. In such context, the present work aims to evaluate the catalytic activity of alkal
Publicado em: 2009
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9. Development of a new process to produce of fatty acids ethyl esters (biodiesel) from castor oil / DESENVOLVIMENTO DE UM NOVO PROCESSO PARA A PRODUÇÃO DE BIODIESEL ETÍLICO DE MAMONA
The present work seeks study the production of fatty acids ethyl esters from Ricinus communis L. by alkaline transesterification of castor oil with ethanol. This methodology will be used to determine the optimum conditions for biodiesel production from castor oil using the minimal number of unit operations with the consequent benefit from economical point of
Publicado em: 2009
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10. Análise termo-oxidativa do biodiesel de girassol (helianthus annuus) / Thermo-oxidative Analysis of Sunflower (Hellianthus annus) Biodiesel
The present work aims at investing the biodiesel obtained from the transesterification of sunflower oil by means of alkaline catalysis using 30% of ethyl alcohol, 1% KOH for each 100g of oil and (1:6) oil/alcohol molar ratio. The overall content of ethyl esters (99.72%) was determined by gas chromatography coupled to mass spectrometer, confirm the efficiency
Publicado em: 2009
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11. Evaluation of the Fluid Dynamic Properties and Kinetic Study by Pressurized Differential Scanning Calorimetry (PDSC) of Ethanolic Biodiesel Derived from Used Frying Oil / Avaliação das Propriedades Fluído-dinâmicas e Estudo Cinético por Calorimetria Exploratória Diferencial Pressurizada (PDSC) de Biodiesel Etílico Derivado de óleo de fritura usado
The present work aimed at investigating the biodiesel issuing from the transesterification of used frying oil with ethanol, via alkaline catalysis. Such investigation covers its thermo-oxidative stability during heating (thermal analysis and rheological properties) as well the kinetic profiles of the samples in the best oxidative induction time by the techni
Publicado em: 2009
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12. Chemical synthesis of dienantin andda trienantin, and toxicological evaluation of chronic consumption in rats. / Síntese química da dienantina e da trienantina e avaliação toxicológica do consumo crônico em ratos.
Medium chain triacylglycerols (MCT), as found in milk fat and coconut and palm oil, are recommended as a source of rapidly available energy for pre- and postchirurgical patients, and for those with burns, cancers or presenting disorders associated with the absorption and/or metabolism of long chain triacylglycerols. Typically, however, short and medium chain
Publicado em: 2004