Gasification
Mostrando 25-36 de 59 artigos, teses e dissertações.
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25. SUPERCRITICAL WATER GASIFICATION OF BIOMASS
We performed Supercritical Water Gasification (SCWG) for cellulose and lignin for the first time in the absence of catalytic effects from metallic walls, by using quartz reactors. We quantified the catalytic effect of metals by adding metal wires to the reactors. We also performed the first systematic study of the effect of variables on gas yields. We varied
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2009
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26. Pirolise e gaseificação de casca de castanha de caju : avaliação da produção de gas, liquidos e solidos / Pyrolysis and gasification of cashew nut shell : evaluation of liquid, solids and gas products
Os processos de gaseificação e pirólise sofrem grande influência do tipo de biomassa que está sendo utilizada propiciando variações na distribuição dos produtos (alcatrão, cinzas, água, gás). No processo de gaseificação é obtido, principalmente, um gás combustível que pode variar seu poder calorífico de acordo com as temperaturas e agentes
Publicado em: 2009
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27. Modelagem e simulação de um gaseificador em leito fixo para o tratamento térmico de resíduos sólidos da indústria calçadista
A indústria calçadista gera uma significativa quantidade de resíduos, sendo uma alternativa para destino destes o tratamento térmico, que reduz o volume e estabiliza componentes perigosos. Por conseguinte, isto vai ao encontro dos novos desafios na busca de fontes de energias alternativas pelo fato da combustão destes resíduos ser bastante convidativa
Publicado em: 2009
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28. Análise enzimática de fungos lignocelulolíticos cultivados em vinhaça e bagaço de cana-de-açúcar / Enzymatic analysis of lignocellulolytic fungi cultivated in vinasse and sugarcane bagasse
The sugar-alcohol industry is an important representation of the bioenergy potential of Brazil. The estimative for the 2007/2008 sugarcane production, according to the National Supply Company (Conab), will be of about 11% more than the last season. Sugarcane constitutes a large and renewable energy source. Besides the exploitation of its juice for ethanol pr
Publicado em: 2009
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29. Performance prediction and validation of equilibrium modeling for gasification of cashew nut shell char
Cashew nut shell, a waste product obtained during deshelling of cashew kernels, had in the past been deemed unfit as a fuel for gasification owing to its high occluded oil content. The oil, a source of natural phenol, oozes upon gasification, thereby clogging the gasifier throat, downstream equipment and associated utilities with oil, resulting in ineffectiv
Brazilian Journal of Chemical Engineering. Publicado em: 2008-09
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30. A influência da implantação de um terminal aquaviário na dinâmica sedimentar local da Baía de Guanabara / The influence of the implantation of an aquaviary terminal in local dynamics sedimentary f the Guanabara Bay, RJ
Since the beginning of the XIX century, interventions on the Guanabaras Bay drainage basin result in severe environmental degradation. This work aimed to analyze the implementation of an Aquaviary Terminal of Liquefied Natural Gas (LNG), and its putative consequences on the local sedimentation processes, and the availability and possible associated contamina
Publicado em: 2008
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31. Modelagem e simulaÃÃo de um gaseificador de biomassa em leito fluidizado borbulhante para produÃÃo de energia
O desenvolvimento de tecnologias de gaseificaÃÃo de biomassa para a geraÃÃo de energia elÃtrica à atrativo para o nosso paÃs, pois assegura a diversificaÃÃo da matriz energÃtica, favorece o desenvolvimento sustentÃvel das comunidades carentes em regiÃes isoladas e preservam o meio ambiente. A tÃcnica de gaseificaÃÃo à extremamente versÃtil,
Publicado em: 2008
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32. Controle e avaliação de um conjunto gaseificador-combustor de fluxo concorrente, utilizando como combustível a biomassa de lenha de eucalipto / Control and evaluation of a set gasifier-combustor with co-current flow using eucalyptus wood as a fuel
Recently, concern has grown considering environmental issues associated with the preservation of natural resources with the intention of improving the present and future quality of life. Biomass gasification shows to be a sustainable technology for power generation with low greenhouse gas emissions. One of the problems by using the gasifier for air heating p
Publicado em: 2008
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33. TRATAMENTO DE REVESTIMENTOS GASTOS DE CUBA ELETROLÍTICA DA INDÚSTRIA DE ALUMÍNIO / TREATMENT OF SPENT POTLINER FROM ALUMINIUM INDUSTRY
Spent Potliner (SPL) is a residue from the primary aluminium production. It is indicated as the major environmental problem in the aluminum industry. SPL is formed by two fractions: Carbonaceous and refractory. According to Brazilian Standards NBR 10004, the SPL is listed as hazardous waste (K088) because it contains high levels of cyanides (complex). The pr
Publicado em: 2007
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34. Analise termodinamica de um sistema de cogeração com gaseificação de licor negro / Termodynamic analysis of a cogeneration system with blak liquor gasification
The pulp and paper industries generate most part of energy for self consumption burning two different fuels: biomass and black liquor, which is more used than the first one. This industrial sector has been used cogeneration systems, to produce electric energy from the combustion of these fuels. In the last years an increase in the production of the industrie
Publicado em: 2007
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35. GaseificaÃÃo de materiais lignocelulÃsicos para geraÃÃo de energia elÃtrica / Gasification of lignocellulosic materials for generation of electric energy
The gasification of solid fuel as biomass can be defined as the transformation of it into a combustible gas. This gas is made up of a mixture of carbon monoxide, hiydrogen, metane, small amounts of other light hydrocarbonetes, carbonm dioxide and water vapor, in addition to nitrogen, which is presetn in air. The objective of this work was to built a contercu
Publicado em: 2007
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36. VALUATION OF GTL PROJECT: A REAL OPTION APLICATION WITH MEAN REVERSION MODEL / AVALIAÇÃO ECONÔMICA DO PROJETO GTL: UMA APLICAÇÃO DA TEORIA DE OPÇÕES REAIS COM PROCESSO DE REVERSÃO À MÉDIA
The present work has objective to analyze the investiment of a XTL plant using the Real Options Theory. This methodology is adjusted to evaluate the capacity that this project has to changes its input and/or output, in other words, to elect the option that maximizes payoff, in accordance with each scenario, allowing to evaluate the construction of a plant wi
Publicado em: 2007