999 resultados para Nível operacional
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Psicologia do Desenvolvimento e Aprendizagem - FC
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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This work presents a study on the production of biodiesel by esterification reaction of oleic acid with methanol using batch reactor and different catalysts based on CeO2 and WO3 and HZSM-5. Acid treatment was performed in order to increase the catalytic activity. Different characterization techniques were performed, among them X-ray diffraction (XRD), Thermogravimetric analysis TGA/DTA, Spectroscopy in the Region in Fourier Transform Infrared (FTIR) and X-ray fluorescence (XRF). The effects of independent variables: temperature, molar ratio of oil: alcohol and the amount of catalyst and their interactions on the dependent variable (conversion of oleic acid to the corresponding ester). Overall, through the results obtained in the characterization was observed that the applied treatments were efficient, however the XRF technique, indicated that tungsten oxide leaching could occur during the preparation of the materials. The treatments performed on HZSM-5 caused no significant changes in the structure indicating that the zeolite was quite resistant to the treatments used. It was evaluated using complete 23 factorial design. For the catalysts investigated, the best reaction conditions were obtained when using higher levels of the independent variables temperature and amount of catalyst. However, for the variable molar ratio the lowest level showed significant yields for most of the synthesized catalyst, obtaining maximum conversion to the OC (67.97%), OW (74.37%), HZSM-5 (61.16%) OC-OW 1 (75.93%), OC-OW 2 (82.57%), OC-OW 3 (79.15%), S/OC-OW 1 (86.90%), S/OC-OW 2 (91.04%), S/OC-OW 3 (88.60%), S/OC-OW/H 1 (92.34%), S/OC-OW/H 2 (100%) and S/OC-OW/H 3 (98.16%). According to the experimental design, the temperature has the biggest influence on the reaction variable for all the synthesized catalysts. Among the catalysts investigated S/OC-OW/H 2 e S/OC-OW/H 3 were more effective. Reuse tests showed that the catalyst activity decreased after each cycle, indicating that the regeneration process was effective. The leaching test indicated that the catalysts are heterogeneous in the evaluated operating range. The catalysts investigated showed themselves promising for the production of biodiesel.
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Pós-graduação em Biopatologia Bucal - ICT
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Presentación .-- I. Antecedentes generales .-- II. Marcos para la implementación de la agenda regional en población y desarrollo .-- III. Operacionalización de las medidas prioritarias del Consenso de Montevideo sobre Población y Desarrollo: A. Integración plena de la población y su dinámica en el desarrollo sostenible con igualdad de género y respeto de los derechos humanos. B. Derechos, necesidades, responsabilidades y demandas de niños, niñas, adolescentes y jóvenes. C. Envejecimiento, protección social y desafíos socioeconómicos. D. Acceso universal a los servicios de salud sexual y salud reproductiva. E. Igualdad de género. F. La migración internacional y la protección de los derechos humanos de todas las personas migrantes. G. Desigualdad territorial, movilidad espacial y vulnerabilidad. H. Pueblos indígenas: interculturalidad y derechos. I. Afrodescendientes: derechos y combate al racismo y la discriminación racial.
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
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Pós-graduação em Saúde Coletiva - FMB
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Este documento constituye la contribución de la Mesa Directiva de la Conferencia Regional sobre Población y Desarrollo de América Latina y el Caribe a la Segunda Reunión de la Conferencia Regional, que se realizará en la Ciudad de México, del 6 al 9 de octubre de 2015. Es un instrumento técnico, en que se proporcionan a los países de la región orientaciones específicas para la implementación de las medidas prioritarias del Consenso de Montevideo sobre Población y Desarrollo y se ofrecen insumos relevantes para el monitoreo de dicha implementación, tanto a escala nacional como regional.