Clean Technologies
Mostrando 13-24 de 39 artigos, teses e dissertações.
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13. Linguagens de domínio específico e sensores baseados em modelos biológicos de computação
A Domain Specific Language is a specification language dedicated to a particular domain, representation technique, or solution searching method. On the other hand, a general-purpose programming language is a language designed with the goal of emulating Lambda Calculus or Turing Machine. Since general-purpose languages must accept any algorithm that can be ex
Publicado em: 2010
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14. Enhancing cobalt dispersion in supported Fischer-Tropsch catalysts via controlled decomposition of cobalt precursors
Fischer-Tropsch synthesis is a part of Gas-to Liquids (GTL), Biomass-to-Liquids (BTL) and Coal to Liquids (CTL) technologies, which produce alternatives clean fuels from natural gas, biomass and coal. The catalytic performance of cobalt catalysts in Fischer-Tropsch synthesis strongly depends on the size of cobalt particles in nanoscale range (6-30 nm). Cobal
Brazilian Journal of Physics. Publicado em: 2009-04
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15. O mecanismo de desenvolvimento limpo (MDL) e transferência de tecnologia: o projeto de MDL do aterro sanitário de Salvador / O mecanismo de desenvolvimento limpo (MDL) e transferência de tecnologia: o projeto de MDL do aterro sanitário de Salvador
This study aims to verify technology transfer occurrence in the Clean Development Mechanism (CDM). This study object serves as an economic motivation for nations that need to reduce their carbon dioxide emission rates during the 2008-2012 marking period. The CDM takes all practicable steps to promote, facilitate and finance, the transfer of, or access to, en
Publicado em: 2009
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16. Utilização de células a combustível tipo PEM como alternativa na geração auxiliar em instalações elétricas de grande porte. / The use of PEM type fuel cells as an alternative to auxiliary generation of large eletrical instalations.
The current global energy situation shows the dependence on the electric energy, and the importance of the rational use of energy and the reduction of pollutants in the production of energy. The hydrogen as source of generation of electrical energy in fuel cells uses an abundant resource in Earth, and produces electrical energy with no pollution. The fuel ce
Publicado em: 2009
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17. Waste management focousing on industrial sustainability study case: petrochemical industries in Rio de Janeiro state / Gerenciamento de resíduos buscando a sustentabilidade industrial estudo de caso: indústrias petroquímicas localizadas no estado do Rio de Janeiro
This research has the aim of evaluating environmental management systems of five petrochemical industries in the State of Rio de Janeiro. This studys main focus is on the management of solid and liquid wastes which are generated during producing processes and the commitment with Brazilian laws applied to environmental protection. Following the development on
Publicado em: 2009
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18. Produção de biodiesel via transesterificação do óleo de nabo forrageiro
The obtainment of solid, liquid and gaseous fuels from biomass is among the well-known possibilities of the use of the energetic resources. Brazil is considered a privileged country to develop from biomass point of view, due to its vast farmland, abundance of water and high incidence of solar radiation on the land, and the availability of rural workforce. Pr
Publicado em: 2009
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19. Sustainable business: the concept of governance change - application a company in the petrochemical / Sustentabilidade empresarial: o conceito da governança climática aplicação a uma empresa do ramo de petroquímica
With vital significance, the greenhouse effect gases (GEG), as carbon dioxide and methane, among others, retain sun heat in the atmosphere. This fact avoids sun radiation from dissipating, without letting the Planet being warm enough to keep right conditions for live existence of Earth. However, mankind activities are increasing concentration of these gases
Publicado em: 2009
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20. AvaliaÃÃo dos solventes diÃxido de carbono supercrÃtico e propano subcrÃtico na extraÃÃo do Ãleo de girassol / Evaluation of supercritical carbon dioxide and subcritical propane as solvents in the extraction of the sunflower oil
The extraction of oil from greasy seeds is traditionally based in the use of organic solvents. Currently the most used method is the process of extraction by n-hexane. Aiming the obtainment of vegetable oil with higher quality using clean technologies with reduction of oil contamination through solvent and minimizing the damage to the environment is that the
Publicado em: 2009
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21. Biocombustíveis: uma análise das políticas públicas / Biocombustiveis: one analyzes of the politics publishes
This study has as an objective the analysis of Brazilian public policies with respect to Biofuels. Showing, through Brazilian juridical foundations, the sectors regulatory conditions and legal alterations that occurred with the promulgation of 1988s federal constution. The problem develops having as focus the Proálcool and Probiodiesel programs, describing
Publicado em: 2008
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22. CATENARY DOME OF FIBER SOIL STRUCTURED WITH BAMBOO - CONCEPTION AND CONSTRUCTIVE PROCESS / CÚPULA CATENÁRIA DE FIBROBARRO ESTRUTURADO COM BAMBU - CONCEPÇÃO E PROCESSO CONSTRUTIVO
The current model of cities development, considering the wild consumption of not renewable resources, has shown impracticable due the sustainability point of view. Fact which is really concerned a lot of preoccupation in many sectors of human society. In the world-wide scenery, mainly at civil construction sector, it is growing a big demand for the use of ne
Publicado em: 2008
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23. Electricity generation from the offshore wind energy source. / Geração de energia elétrica a partir da fonte eólica offshore.
In the last decade wind power source was the fastest-growing energy source. Technological learning curves for this sector fall down by a 15% a 20% rate each 3 years. Countries which are committed with wind power are running after the target of 12% wind into the worlds electrical production by 2020. The contribution of the offshore wind power (OWP) source is
Publicado em: 2008
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24. Knowledge about wind energy: an exploratory study taking into account natural semantic networks of students from Natal-RN / Conhecimento sobre energia eólica: um estudo exploratório a partir das redes semânticas naturais de estudantes da cidade de Natal
The human being has a fundamental role in issues concerning scarcity of energy resources as well as in the success of technologies which favor the use of renewable sources, such as wind energy. But what does wind energy mean for people? What are the psychological meanings concerning this term? Aiming to answer these questions, the general objective of this d
Publicado em: 2008