Biocombustaveis
Mostrando 13-15 de 15 artigos, teses e dissertações.
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13. Uma reflexÃo sobre os possÃveis impactos do crescimento da demanda dos biocombustÃveis na oferta e preÃos das commodities agrÃcolas
The food market has changed. The use of liquid biofuels as an alternative to fossil fuel changed the crop and vegetable oil international markets, adding an important consumer sector of the economy: the energy sector. The rapid growth of biofuels demand and supply has a number of effects on the crop and vegetable oil markets, pressuring upward the agricultur
Publicado em: 2008
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14. SÃntese, caracterizaÃÃo e aplicaÃÃo de catalisadores heterogÃneos para a produÃÃo de biocombustÃveis / Synthesis,characterization and applications of heterogeneos catalysers for the biodiesel productions
Biodiesel is industrially produced by homogeneous transesterification of vegetable oils in the presence of basic species. However, removal of the base after reaction is a major problem, since purification of the ester phase is needed. In this study, different heterogeneous catalysts, based on calcium oxide (4-20%) supported on mesoporous SBA- 15 silica, and
Publicado em: 2008
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15. O papel de Apis Mellifera l. como polinizador da mamoneira (Ricinus Communis L.): avaliaÃÃo da eficiÃncia de polinizaÃÃo das abelhas e incremento de produtividade da cultura / The role of Apis Mellifera L. how polinizador of mamoneira (Ricinus Communis L.): assessment of efficiency of bee polinizaÃÃo and enhancement of productivity of culture
The research was carried out in the NÃcleo de ProduÃÃo ComunitÃria Santa Clara, idealized and administered by the Brasil Ecodiesel IndÃstria e ComÃrcio de BiocombustÃveis e Ãleos vegetais S. A., county of Canto do Buriti, state of PiauÃ, Brazil, and at the Universidade Federal do CearÃ, located in Fortaleza, state of CearÃ. Data were collected fro
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2007