Soybean Biodiesel
Mostrando 13-24 de 121 artigos, teses e dissertações.
-
13. Appliance of a high pressure semi-batch reactor: supercritical transesterification of soybean oil using methanol
Abstract This work presents the results of a supercritical transesterification process of soybean oil using methanol, performed in a laboratory high pressure semi-batch reactor. A full description of the equipment and a standard operating procedure are also provided. Since fossil fuels are not renewable, biofuels such biodiesel, have gained attention over t
Food Sci. Technol. Publicado em: 31/01/2019
-
14. 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
-
15. Resistencia a la corrosión de aleaciones Al-Cu en biodiesel
ABSTRACT The aim of the present work was to evaluate the susceptibility to corrosion in biodiesel of Al-Cu alloys directionally solidified: Al-4.5wt.%Cu and Al-15wt.% Cu, in function of the type of structure (columnar, equiaxed or columnar-to-equiaxed transition - CET) and chemical composition. Working electrodes were prepared with different types of alloy s
Matéria (Rio J.). Publicado em: 19/07/2018
-
16. AVALIAÇÃO DE CARACTERÍSTICAS DE BIODIESEIS DE FONTES ALTERNATIVAS SUBMETIDOS A CONDIÇÕES DE ARMAZENAGEM DIFERENCIADA
Biodiesel is an alternative fuel obtained from different biomass sources and processes. Nowadays, this biofuel has gained importance due to environmental concerns and rising energy demand. In the biodiesel production chain, stability is a critical issue, as it is linked to the maintenance of its original properties. This work performed a study evaluating the
Quím. Nova. Publicado em: 2018-06
-
17. 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
-
18. Development of a Novel and Simple Electroanalytical Procedure for the Determination of Copper in Biofuel Employing a Sensor Based on Vulcan Functionalized with Carbazone
A novel and simple electroanalytical method for the determination of Cu2+ in biodiesel samples by stripping voltammetric analysis was developed. The method employs a carbon paste electrode (CPE) modified with Vulcan carbon, previouly functionalized with carbazone (CBZ). The CPE/Vulcan-CBZ sensor promoted a significant increase in the analytical signal obtain
J. Braz. Chem. Soc.. Publicado em: 2018-04
-
19. Nitrile rubber and carboxylated nitrile rubber resistance to soybean biodiesel
Abstract Biodiesel has been considered a suitable substitute for petroleum diesel, but their chemical composition differs greatly. For this reason, biodiesel interacts differently than petroleum diesel with various materials, including rubbers. Therefore, the resistance of some elastomers should be thoroughly evaluated, specifically those which are commonly
Polímeros. Publicado em: 15/03/2018
-
20. ENZYMATIC BIODIESEL SYNTHESIS FROM ACID OIL USING A LIPASE MIXTURE
The conventional biodiesel production process has some disadvantages. It is necessary to use refined vegetable oils with low free fatty acids (FFAs) content. An alternative route is to use low-cost acid oils in an enzymatic process. The use of lipases allows simultaneous esterification of FFAs and transesterification of triglycerides present in raw material
Quím. Nova. Publicado em: 2018-03
-
21. Biodiesel Glycerides from the Soybean Ethylic Route Incomplete Conversion on the Diesel Engines Combustion Process
An evaluation was made to determine the effect of the glycerides presence resulting from the incomplete conversion of soybean biodiesel produced via alkaline catalysis and ethylic route on engine performance, and emissions in formulations containing 10 and 20% (m/m) of biodiesel used as additives in base diesel with low sulfur content and cetane ratings of 4
J. Braz. Chem. Soc.. Publicado em: 2017-12
-
22. Separation and Identification of Functional Groups of Molecules Responsible for Fluorescence of Biodiesel Using FTIR Spectroscopy and Principal Component Analysis
In order to separate and identify functional groups of molecules responsible for fluorescence compounds present in biodiesel, a column chromatography coupled with infrared spectroscopy and multivariate analysis was performed. A biodiesel sample was packed in a chromatographic column and the fractions obtained were used to perform the analyses. Before undergo
J. Braz. Chem. Soc.. Publicado em: 2017-12
-
23. ÓXIDOS METÁLICOS DERIVADOS DE MATERIAIS TIPO HIDROTALCITAS CONTENDO Ga3+ COMO CATALISADORES PARA SÍNTESE DE BIODIESEL ETÍLICO
Summary: The synthesis of like-hydrotalcites materials (layered double hydroxides - LDHs) with molecular formula MgxM3+y(CO3)(OH)16·4H2O in different ratios Mg2+/M3+ where M3+ is Al3+, Ga3+ or both was carried out by the coprecipitation method to be applied in the transesterification reactions for synthesis of ethyl biodiesel from soybean oil and ethanol. T
Quím. Nova. Publicado em: 2017-06
-
24. Concentration Profiles of Regulated and Unregulated Pollutants Emitted from the Combustion of Soybean Biodiesel and Diesel/Biodiesel Blend Originating of a Diesel Cycle Engine
This study evaluated the concentration profiles of regulated and unregulated pollutants emitted from a stationary diesel engine cycle, operating at the speed of 1800 rpm and 0% load, using biofuels and binary blends. The experimental test considered fuel burning time on three different periods and storage times. The operation of the engine when it is still c
J. Braz. Chem. Soc.. Publicado em: 2017-04