Energetic, ecologic and fluid-dynamic analysis of a fluidized bed gasifier operating with sugar cane bagasse

This work aims to study the thermodynamic, ecological and fluid-dynamic aspects of a circulating fluidized bed gasifier using sugar cane bagasse as biomass, in order to estimate a model of its normal operation. In the initial stage was analysed the composition of biomass selected (sugar cane bagasse) and its lower heating value (LHV) was calculated. The energy balance of the gasifier was done, being the volumetric flow of air, synthesis gas and biomass estimated. Also the power produced by this gasifier was theoretically estimated. Then the circulating fluidized bed gasifier was designed for operation with approximately 100 kg/h of processed biomass. Cross-sectional area of the reactor, feeder size, diameter of the exit zone of the gases and minimum height of the expanded bed were selected. Some bed gasifier hydrodynamic factors were also studied. The minimum fluidization velocity, fluidization terminal velocity, and average fluidizing velocity were calculated, in order to understand the fluid-dynamic behaviour of gasification of this fuel. It was obtained a theoretical model that can support a possible prototype of circulating fluidized bed gasifier biomass. Finally, there were studied the ecological aspects of the gasifier, through an overall methodology. Ecological efficiencies were estimated for two scenarios: first considering the carbon cycle and thereafter disregarding the carbon cycle. In both cases, it can be proved the ecological viability of the project. © 2013 Elsevier Ltd. All rights reserved.

Emissão de gases de efeito estufa em áreas de sistema semeadura direta com aportes diferenciados de carbono e nitrogênio

Pós-graduação em Agronomia (Agricultura) - FCA

Comunidades bacterianas em solos de mata nativa e cultivados com cana-de-açúcar

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Inventário dos gases de efeito estufa associado ao manejo da cana-de-açúcar na localidade de Barretos-SP, Brasil

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Estudo da emissão e do controle dos gases e particulados provenientes da queima de biomassa

Pós-graduação em Engenharia Mecânica - FEG

Balanço de gases de efeito estufa e emissões de CO2 do solo nos sistemas de colheita da cana-de-açúcar manual queimada e mecanizada crua

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Avaliação dos níveis de umidificação e aquecimento durante ventilação artificial com a estação de trabalho de anestesia Primus da Dräger com baixo fluxo de gases frescos e permutador de calor e umidade

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Comparação da umidade e temperatura dos gases inalados com alto ou baixo fluxo de gases frescos e com ou sem permutador de calor e umidade em anestesia pediátrica

Pós-graduação em Anestesiologia - FMB

Redução das emissões de gases efeito estufa no processo de fabricação do sinter

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Information technology as a technical resource for the memories: memories of UNATI-Marília in the virtual environment

UNATI (Open University of the Third Age), UNESP, Marília campus, has offered subsidies for the development of this work aimed at researching the existing relationships between information mediation processes and technological devices, especially computers, assuming that reading practices and textual construction in online environments could help the “third age” population to have access to these devices, thus promoting digital inclusion in this group. Mediation was presented as an interventionist action that, by introducing an intermediate element in the learning process, causes a rupture in the ways of living and personal digital inclusion processes hitherto experienced. In the context of a workshop, we found out that there is a physical relationship between subjects and technological supports and such a contact proved to be necessary, considering that handling a computer required knowledge of procedures, thus furthering a logic of use. It turned out to be necessary to develop actions that would enable the handling of a computer so as to bring about acceptance of these supports. Accordingly, activities were developed so as to articulate reminiscent processes, memories of older adults, the writing down of such memories and the creation of a blog to bring enhanced visibility to the content produced by older people. Such actions have shown that remembering, writing down and posting can reshape not only social relations but somehow significantly promote digital inclusion among older adults.

Postharvest parameters of the Fuerte avocado when refrigerated in different modified atmospheres

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Análise das emissões de gases do efeito estufa na produção do milho através da fertilização por resíduos de biocombustível. Estudo de caso : Dedelow - Brandemburgo - Alemanha

The focus of this research study were gas exchange between soil and atmosphere of nitrous oxide (N2O) between different fertilization treatments Corn The research, conducted in the experimental field Dedelow - Brandenburg / Germany, analyzed three different fertilization treatments, aiming to quantify GHE emissions, to identify the influence of the residue of biogas in the release of these gases process in agricultural soils in search for a solution fertilization less harmful to the environment and the greenhouse effect , based on the comparison of three treatments: organic fertilization, mineral fertilization and no fertilization. It was found through the analysis of the measurements that the first was the one which issued N2O, showing that even though coming from the residue of biogas , when returned to the soil, it becomes harmful to the environment and global warming . The cultivation of energy crops can lower or raise the emissions of greenhouse gases, so it is necessary for further research on this question not only in Germany , where such research is in continuity, but also in Brazil, a pioneer in the introduction to his energy matrix of a biofuel produced from cane sugar

Caracterização de estruturas de óxido de estanho modificado como sensores de gases

Pós-graduação em Química - IQ

Early human handling in non-weaned piglets: Effects on behaviour and body weight

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Fluxo de gases de efeito estufa na implantação de sistema silvipastoril em pastejo com ovinos

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)