Fatty Acid Ethyl Ester
Mostrando 1-12 de 20 artigos, teses e dissertações.
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1. ESTERIFICATION OF OLEIC ACID IN A SEMI-BATCH BUBBLE REACTOR FOR BIODIESEL PRODUCTION
ABSTRACT A semi-batch bubble reactor has been developed to produce fatty acid ethyl ester (biodiesel) by acid-catalyzed esterification of oleic acid with superheated ethanol vapor. In this paper, the effects of reaction temperature (110, 130 and 150°C), ethanol volumetric flow rate (1.35, 2.50 and 3.65 mL/min) and vapor bubble size on the reactor performanc
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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2. Thermal Properties of the Blends of Methyl and Ethyl Esters Prepared from Babassu and Soybean Oils
Fatty acid esters (methyl and ethyl) prepared from babassu nut oil were blended with the respective esters from soybean oil. These binary blends (babassu:soybean) were made in proportions of 10:90, 20:80, 30:70, 40:60, and 50:50 (vol%). The ester content of all the blends was higher than 96.5%, which is the minimum value required by the Brazilian National Ag
J. Braz. Chem. Soc.. Publicado em: 2018-08
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3. Determination of Alkyl Esters Content by Gas Chromatography: Validation of Method Based on Short Column and Response Factor
In this study an analytical method, based on gas chromatography with flame ionization detection, using a short column and response factor (GCSCRF), was validated for the quantification of fatty acid alkyl esters (methylic or ethylic). During the validation process, the proposed method was employed to analyze twenty samples of fatty acid methyl esters and fat
J. Braz. Chem. Soc.. Publicado em: 2018-06
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4. Assessment of process variables on the use of macauba pulp oil as feedstock for the continuous production of ethyl esters under pressurized conditions
ABSTRACT This study evaluated the potential of macauba pulp oil (MPO) as a feedstock for continuous ester production using ethanol under pressurized conditions. Experiments were performed in order to obtain data for the effect of process variables on ethyl ester (FAEE) and free fatty acid (FFA) conversion in a catalyst-free process. From the results, it appe
Braz. J. Chem. Eng.. Publicado em: 2017-07
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5. Utilization of immobilized lipases as catalysts in the transesterification of non-edible vegetable oils with ethanol
This work reports the use of commercially available immobilized lipase preparations (Novozym® 435 and Lipozyme TL IM, both from Novozymes, and Lipase PS IM from Amano) as catalysts in the transesterification reaction of different alkyl-chain triglycerides with ethanol. The ethanolysis of native oils from Brazilian Amazon plants andiroba (Carapa guianensis),
Braz. J. Chem. Eng.. Publicado em: 2014-12
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6. Continuous catalyst-free production of esters from Jatropha curcas L. oil under supercritical ethanol
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
Braz. J. Chem. Eng.. Publicado em: 2014-09
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7. Transesterificação química e enzimática de miscela etanólica de óleo de soja / Chemical and enzymatic transesterification of soybean oil ethanolic miscellae
A matéria-prima na produção de biodiesel corresponde a mais que 70% do seu custo e o estudo de viabilidade tecnológica e econômica das diferentes matérias-primas se reveste de enorme importância. A extração do óleo de soja com solvente etanol resulta em duas miscelas, uma rica em óleo (miscela rica) e outra rica em etanol (miscela pobre). A miscel
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/05/2012
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8. Synthesis, characterization and catalytic activity of mesoporous materials Al-MCM-41 in transesterification reaction of cottonseed oil / Síntese, caracterização e avaliação catalítica do aluminossilicato mesoestruturado AI-MCM-41 na transesterificação de óleos vegetais
Molecular sieves have been applied to the processing of triacylglycerols, to produce biofuels. In this context, the mesoporous catalyst Al-MCM-41 was proposed in this work as an alternative to acid heterogeneous transesterification of cottonseed oil with ethanol. This material was prepared using various Si/Al molar ratios (25, 50, 75 and 100) with reaction t
Publicado em: 2010
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9. Productions of ethyl esters (biodesel) from the transesterification core residual oil / Produção de esteres etilicos (biodiesel) a partir da transesterização basica de oleo residual
Biodiesel (alkyl esters) is a clean burning fuel derived from a renewable lipid feedstock such as vegetable oil or animal fat. It is biodegradable, non-inflammable, nontoxic and produce much lesser COx, sulfur dioxide and unburned hydrocarbons than petroleum-based diesel. Nowadays, due to the price of virgin oil such as soybean and canola oils, the use of lo
Publicado em: 2008
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10. The chemical study of biological activities from the mansoa hirsuta Bignoniaceae / Estudo químico e de atividades biológicas da mansoa hirsuta D.C (Bignoniaceae)
Plants of the Bignoniaceae family in Brazil, as Mansoa hirsuta, have medicinal use and some biological activities were already proved experimentally. This study aimed to isolate and identify compounds with activity anti-Leshmania amazonensis, anti-Tripanossoma cruzi, molluscicidal, larvicidal and immunomodulatory in plant extracts of Mansoa hirsuta D.C.. The
Publicado em: 2006
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11. Constituintes quimicos de cinco especies de Echinodorus e avaliação do beta-pineno como substrato para obtenção de quirons mais elaborados
The present thesis has been divided into two sections The first part concerns the isolation and identification of the secondary metabolites of the leaves and pecioles of Echinodorus grandiflorus from Curitiba-PR. Conventional phytochemical analysis resulted in the identification of 11 compounds : phytol (8), hardwickic acid, methyl ester (14a), echinoic acid
Publicado em: 2000
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12. Metabolism of ethanol and carcinogens by glutathione transferases.
Nonoxidative alcohol metabolism to form fatty acid ethyl esters contributes to alcohol-related end-organ damage, and these products are formed by two synthase enzymes. We recently purified the major (pI 4.9) synthase from human myocardium. The N-terminal sequence (A P Y T V V Y F P V R G R X K A L R M L X A D) is greater than 73% identical with that of a neu