The Experts below are selected from a list of 294 Experts worldwide ranked by ideXlab platform
Allan K Barros - One of the best experts on this subject based on the ideXlab platform.
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Characterization and kinetic study of Sunflower Oil and biodiesel
Journal of Thermal Analysis and Calorimetry, 2011Co-Authors: Anne Gabriella Dias Santos, Antonio S Araujo, Vinícius P. S. Caldeira, Luiz Di Souza, Mirna F. Farias, Allan K BarrosAbstract:Abstract In this study, the physico-chemistry characterization and kinetic study of the thermal decomposition of Sunflower Oil and its biodiesel were carried out. Sunflower biodiesel was synthesized by the methanol route and basic homogeneous catalysis. The physicochemical characterization of the Sunflower Oil and biodiesel were performed according to standards set out in the ANP resolution, and both are in accordance to the specifications. The chromatographic analysis was obtained by GC-FID. The yield of conversion of 97.4 wt% of Sunflower Oil in methyl esters confirms the efficiency of the conversion of the fatty acids into esters. The thermal analysis was performed on a thermobalance, using heating rates of 5, 10, and 20 °C min−1. In these three rates, we observed a single well-defined step of mass loss that describes the volatilization and decomposition of the Sunflower Oil and the biodiesel. The kinetic study was performed using equations of approximation and integration methods such as Coats–Redfern...
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model free kinetics applied to volatilization of brazilian Sunflower Oil and its respective biodiesel
Thermochimica Acta, 2010Co-Authors: Anne Gabriella Dias Santos, V J Fernandes, Antonio S Araujo, Vinícius P. S. Caldeira, Luiz Di Souza, Allan K BarrosAbstract:Model-free kinetic studies for volatilization of Brazilian Sunflower Oil and its respective biodiesel were carried out. The biodiesel was obtained by the methylic route using potassium hydroxide as catalyst. Both Sunflower Oil and biodiesel were characterized by physicochemical analyses, gas chromatography, simulated distillation and thermogravimetry. The physicochemical properties indicated that the Oil and biodiesel samples are in accordance with the specifications of the Brazilian National Agency of Petroleum, Natural Gas and Biofuels (ANP). Gas chromatography indicated that the biodiesel was obtained with a content of ester of ca. 97.35 wt%. The TG curves indicated that the temperatures for volatilization of biodiesel are lower than for Sunflower Oil, which is explained by their different compositions and properties. The value of the apparent activation energy for the volatilization process, as determinated by the Vyazovkin Method, was higher for Sunflower Oil than for biodiesel.
Anne Gabriella Dias Santos - One of the best experts on this subject based on the ideXlab platform.
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Characterization and kinetic study of Sunflower Oil and biodiesel
Journal of Thermal Analysis and Calorimetry, 2011Co-Authors: Anne Gabriella Dias Santos, Antonio S Araujo, Vinícius P. S. Caldeira, Luiz Di Souza, Mirna F. Farias, Allan K BarrosAbstract:Abstract In this study, the physico-chemistry characterization and kinetic study of the thermal decomposition of Sunflower Oil and its biodiesel were carried out. Sunflower biodiesel was synthesized by the methanol route and basic homogeneous catalysis. The physicochemical characterization of the Sunflower Oil and biodiesel were performed according to standards set out in the ANP resolution, and both are in accordance to the specifications. The chromatographic analysis was obtained by GC-FID. The yield of conversion of 97.4 wt% of Sunflower Oil in methyl esters confirms the efficiency of the conversion of the fatty acids into esters. The thermal analysis was performed on a thermobalance, using heating rates of 5, 10, and 20 °C min−1. In these three rates, we observed a single well-defined step of mass loss that describes the volatilization and decomposition of the Sunflower Oil and the biodiesel. The kinetic study was performed using equations of approximation and integration methods such as Coats–Redfern...
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model free kinetics applied to volatilization of brazilian Sunflower Oil and its respective biodiesel
Thermochimica Acta, 2010Co-Authors: Anne Gabriella Dias Santos, V J Fernandes, Antonio S Araujo, Vinícius P. S. Caldeira, Luiz Di Souza, Allan K BarrosAbstract:Model-free kinetic studies for volatilization of Brazilian Sunflower Oil and its respective biodiesel were carried out. The biodiesel was obtained by the methylic route using potassium hydroxide as catalyst. Both Sunflower Oil and biodiesel were characterized by physicochemical analyses, gas chromatography, simulated distillation and thermogravimetry. The physicochemical properties indicated that the Oil and biodiesel samples are in accordance with the specifications of the Brazilian National Agency of Petroleum, Natural Gas and Biofuels (ANP). Gas chromatography indicated that the biodiesel was obtained with a content of ester of ca. 97.35 wt%. The TG curves indicated that the temperatures for volatilization of biodiesel are lower than for Sunflower Oil, which is explained by their different compositions and properties. The value of the apparent activation energy for the volatilization process, as determinated by the Vyazovkin Method, was higher for Sunflower Oil than for biodiesel.
Vinícius P. S. Caldeira - One of the best experts on this subject based on the ideXlab platform.
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Characterization and kinetic study of Sunflower Oil and biodiesel
Journal of Thermal Analysis and Calorimetry, 2011Co-Authors: Anne Gabriella Dias Santos, Antonio S Araujo, Vinícius P. S. Caldeira, Luiz Di Souza, Mirna F. Farias, Allan K BarrosAbstract:Abstract In this study, the physico-chemistry characterization and kinetic study of the thermal decomposition of Sunflower Oil and its biodiesel were carried out. Sunflower biodiesel was synthesized by the methanol route and basic homogeneous catalysis. The physicochemical characterization of the Sunflower Oil and biodiesel were performed according to standards set out in the ANP resolution, and both are in accordance to the specifications. The chromatographic analysis was obtained by GC-FID. The yield of conversion of 97.4 wt% of Sunflower Oil in methyl esters confirms the efficiency of the conversion of the fatty acids into esters. The thermal analysis was performed on a thermobalance, using heating rates of 5, 10, and 20 °C min−1. In these three rates, we observed a single well-defined step of mass loss that describes the volatilization and decomposition of the Sunflower Oil and the biodiesel. The kinetic study was performed using equations of approximation and integration methods such as Coats–Redfern...
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model free kinetics applied to volatilization of brazilian Sunflower Oil and its respective biodiesel
Thermochimica Acta, 2010Co-Authors: Anne Gabriella Dias Santos, V J Fernandes, Antonio S Araujo, Vinícius P. S. Caldeira, Luiz Di Souza, Allan K BarrosAbstract:Model-free kinetic studies for volatilization of Brazilian Sunflower Oil and its respective biodiesel were carried out. The biodiesel was obtained by the methylic route using potassium hydroxide as catalyst. Both Sunflower Oil and biodiesel were characterized by physicochemical analyses, gas chromatography, simulated distillation and thermogravimetry. The physicochemical properties indicated that the Oil and biodiesel samples are in accordance with the specifications of the Brazilian National Agency of Petroleum, Natural Gas and Biofuels (ANP). Gas chromatography indicated that the biodiesel was obtained with a content of ester of ca. 97.35 wt%. The TG curves indicated that the temperatures for volatilization of biodiesel are lower than for Sunflower Oil, which is explained by their different compositions and properties. The value of the apparent activation energy for the volatilization process, as determinated by the Vyazovkin Method, was higher for Sunflower Oil than for biodiesel.
Luiz Di Souza - One of the best experts on this subject based on the ideXlab platform.
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Characterization and kinetic study of Sunflower Oil and biodiesel
Journal of Thermal Analysis and Calorimetry, 2011Co-Authors: Anne Gabriella Dias Santos, Antonio S Araujo, Vinícius P. S. Caldeira, Luiz Di Souza, Mirna F. Farias, Allan K BarrosAbstract:Abstract In this study, the physico-chemistry characterization and kinetic study of the thermal decomposition of Sunflower Oil and its biodiesel were carried out. Sunflower biodiesel was synthesized by the methanol route and basic homogeneous catalysis. The physicochemical characterization of the Sunflower Oil and biodiesel were performed according to standards set out in the ANP resolution, and both are in accordance to the specifications. The chromatographic analysis was obtained by GC-FID. The yield of conversion of 97.4 wt% of Sunflower Oil in methyl esters confirms the efficiency of the conversion of the fatty acids into esters. The thermal analysis was performed on a thermobalance, using heating rates of 5, 10, and 20 °C min−1. In these three rates, we observed a single well-defined step of mass loss that describes the volatilization and decomposition of the Sunflower Oil and the biodiesel. The kinetic study was performed using equations of approximation and integration methods such as Coats–Redfern...
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model free kinetics applied to volatilization of brazilian Sunflower Oil and its respective biodiesel
Thermochimica Acta, 2010Co-Authors: Anne Gabriella Dias Santos, V J Fernandes, Antonio S Araujo, Vinícius P. S. Caldeira, Luiz Di Souza, Allan K BarrosAbstract:Model-free kinetic studies for volatilization of Brazilian Sunflower Oil and its respective biodiesel were carried out. The biodiesel was obtained by the methylic route using potassium hydroxide as catalyst. Both Sunflower Oil and biodiesel were characterized by physicochemical analyses, gas chromatography, simulated distillation and thermogravimetry. The physicochemical properties indicated that the Oil and biodiesel samples are in accordance with the specifications of the Brazilian National Agency of Petroleum, Natural Gas and Biofuels (ANP). Gas chromatography indicated that the biodiesel was obtained with a content of ester of ca. 97.35 wt%. The TG curves indicated that the temperatures for volatilization of biodiesel are lower than for Sunflower Oil, which is explained by their different compositions and properties. The value of the apparent activation energy for the volatilization process, as determinated by the Vyazovkin Method, was higher for Sunflower Oil than for biodiesel.
Antonio S Araujo - One of the best experts on this subject based on the ideXlab platform.
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Characterization and kinetic study of Sunflower Oil and biodiesel
Journal of Thermal Analysis and Calorimetry, 2011Co-Authors: Anne Gabriella Dias Santos, Antonio S Araujo, Vinícius P. S. Caldeira, Luiz Di Souza, Mirna F. Farias, Allan K BarrosAbstract:Abstract In this study, the physico-chemistry characterization and kinetic study of the thermal decomposition of Sunflower Oil and its biodiesel were carried out. Sunflower biodiesel was synthesized by the methanol route and basic homogeneous catalysis. The physicochemical characterization of the Sunflower Oil and biodiesel were performed according to standards set out in the ANP resolution, and both are in accordance to the specifications. The chromatographic analysis was obtained by GC-FID. The yield of conversion of 97.4 wt% of Sunflower Oil in methyl esters confirms the efficiency of the conversion of the fatty acids into esters. The thermal analysis was performed on a thermobalance, using heating rates of 5, 10, and 20 °C min−1. In these three rates, we observed a single well-defined step of mass loss that describes the volatilization and decomposition of the Sunflower Oil and the biodiesel. The kinetic study was performed using equations of approximation and integration methods such as Coats–Redfern...
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Kinetic behavior of Sunflower Oil pyrolysis over mesoporous materials
Fuel Processing Technology, 2011Co-Authors: Ana C. R. Melo, Antonio S Araujo, Edjane F. B. Silva, Ricardo M. Oliveira, Valter J. Fernandes, Antonio G. SouzaAbstract:Abstract Mesoporous materials type MCM-41 and AlMCM-41 were synthesized by the hydrothermal method and characterized by X-ray diffraction and nitrogen adsorption. Analyses have showed that the hexagonal structures of the materials were preserved and the template completely removed. In this work, the degradation of pure Sunflower Oil and mixed with mesoporous materials were evaluated. A kinetic study of the Oil degradation was performed by thermal analysis under heating rates of 5, 10 and 20 °C min −1 using the model-free kinetic in order to determine the kinetic parameters for this process. From this method, the obtained values of apparent activation energy for Sunflower Oil/AlMCM-41 was of 167 kJ mol − 1 .
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Study of degradation kinetics of Sunflower Oil on H-Beta zeolite
Journal of Thermal Analysis and Calorimetry, 2011Co-Authors: Ana C. R. Melo, Mirna F. Farias, Edjane F. B. Silva, Larissa C. L. F. Araujo, Antonio S AraujoAbstract:In this study, were studied the degradation of pure Sunflower Oil and mixed with H-Beta zeolite. This zeolite was synthesized by the hydrothermal method, followed by calcination and ion exchanged. The characterization of the zeolite was performed by X-ray diffraction and nitrogen adsorption/desorption by the method of BET. The analysis showed that H-Beta zeolite presented a good crystallinity and the template was completely removed from the catalyst. The thermal and catalytic degradation study was carried out using the TG/DTG method in multiple heating rates of 5, 10, and 20 °C min−1. The isoconversion method proposed by Vyazovkin was applied to determine the kinetic parameters for degradation of the Sunflower Oil. The activation energy for the degradation process of pure Sunflower Oil was 193 kJ mol−1, while for Sunflower Oil mixed with 20% of H-Beta zeolite was equivalent to 88 kJ mol−1. It was verified that for the degradation of 90% of the Sunflower Oil mixed with H-Beta, for a period of 1 h, a temperature of 356 °C was required, whereas for the pure vegetable Oil, this value was of 387 °C, at the same time period, showing that the catalyst was effective for the degradation process of Sunflower Oil.
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model free kinetics applied to volatilization of brazilian Sunflower Oil and its respective biodiesel
Thermochimica Acta, 2010Co-Authors: Anne Gabriella Dias Santos, V J Fernandes, Antonio S Araujo, Vinícius P. S. Caldeira, Luiz Di Souza, Allan K BarrosAbstract:Model-free kinetic studies for volatilization of Brazilian Sunflower Oil and its respective biodiesel were carried out. The biodiesel was obtained by the methylic route using potassium hydroxide as catalyst. Both Sunflower Oil and biodiesel were characterized by physicochemical analyses, gas chromatography, simulated distillation and thermogravimetry. The physicochemical properties indicated that the Oil and biodiesel samples are in accordance with the specifications of the Brazilian National Agency of Petroleum, Natural Gas and Biofuels (ANP). Gas chromatography indicated that the biodiesel was obtained with a content of ester of ca. 97.35 wt%. The TG curves indicated that the temperatures for volatilization of biodiesel are lower than for Sunflower Oil, which is explained by their different compositions and properties. The value of the apparent activation energy for the volatilization process, as determinated by the Vyazovkin Method, was higher for Sunflower Oil than for biodiesel.
