Petroleum Refineries
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. An integrated optimization and simulation model for refinery planning including external loads and product evaluation
Abstract Because of its potential benefits, petroleum refineries are increasingly concerned about their planning operations. Although some refinery models for production planning were proposed, they are quite limited in their usefulness. This study describes an integrated approach involving nonlinear optimization and simulation of refinery units in order to
Braz. J. Chem. Eng.. Publicado em: 2018-01
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2. COMPARISON BETWEEN ASPHALTENES (SUB)FRACTIONS EXTRACTED FROM TWO DIFFERENT ASPHALTIC RESIDUES: CHEMICAL CHARACTERIZATION AND PHASE BEHAVIOR
Asphaltenes are blamed for various problems in the petroleum industry, especially formation of solid deposits and stabilization of water-in-oil emulsions. Many studies have been conducted to characterize chemical structures of asphaltenes and assess their phase behavior in crude oil or in model-systems of asphaltenes extracted from oil or asphaltic residues
Quím. Nova. Publicado em: 2016-01
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3. 1,3-propanodiol: produção, aplicações e potencial biotecnológico
1,3-propanediol is a high-value specialty chemical which has many industrial applications. Its main use is the production of the polymer polypropylene terephthalate, a thermoplastic used in the textile and automobile industries. The interest in 1,3-propanediol production from glycerol bio-conversion has increased after the employment of biodiesel by various
Quím. Nova. Publicado em: 2014-06
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4. Química Sem Fronteiras: o desafio da energia
Coal, natural gas and petroleum-based liquid fuels are still the most widely used energy sources in modern society. The current scenario contrasts with the foreseen shortage of petroleum that was spread out in the beginning of the XXI century, when the concept of "energy security" emerged as an urgent agenda to ensure a good balance between energy supply and
Quím. Nova. Publicado em: 2013
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5. As empresas de petróleo e as mudanças climáticas : uma avaliação das ações da Petrobrás / Oil companies and climate change : an assessment of the issues of Petrobras
A conexão entre o desempenho das empresas de petróleo e as mudanças climáticas, tomando por base a literatura disponível, constitui-se numa relação pouco estudada, apesar de fundamental quando se discutem as condições de adaptação e mitigação do aquecimento global. Este trabalho trata da análise das ações tomadas em relação às mudanças cl
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/08/2010
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6. Exergy and thermoeconomic evaluation of a petroleum refinery hydrogem production unit. / Produção de hidrogênio em refinarias de petróleo: avaliação exergética e custo de produção.
Pure hydrogen (H2) is an useful gas in chemical and petrochemical industries because it reacts easily with several other elements. On refineries, hydrogen is used to sequestrate sulphur from diesel and gasoline. Emission restrictions regard to fossil fuels are rising the world hydrogen demands. In spite of its abundance, hydrogen is normally found associated
Publicado em: 2010
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7. GestÃo e caracterizaÃÃo dos resÃduos sÃlidos da Lubnor/PETROBRAS: estudo de caso / Management and characterization os solid waste Lubnor/PETROBRAS: a case study
The situation of solid waste in Brazil is worrying, especially with regard to final disposal, as the increase in the wasteâs generation was not followed by a growth of infrastructure. The environmental issue, with the onset and worsening of environmental problems become more important to humans. Most of these problems is due to industrial waste origin, as m
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/08/2009
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8. DETECÇÃO DE ESPÉCIES BACTERIANAS ENVOLVIDAS EM PROCESSOS DE BIODESSULFURIZAÇÃO EM UM SISTEMA DE LANDFARMING, NA REFINARIA GABRIEL PASSOS (REGAP), MINAS GERAIS.
The emission of sulfur from the burning of fossil fuels represents a global problem because it is the major cause of acid rain and air pollution. A major concern of the refineries is reducing the sulfur content of oil. The technology commonly used for this purpose is the hydrodesulfurization. An alternative that is being increasingly considered is biodesulfu
Publicado em: 2009
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9. Experimental characterization of a reactor nozzles injetores of fast pirolise to waste conversion in refineries / Caracterização experimental de bicos injetores de um reator de pirolise rapida para conversão de residuo em refinarias
This thesis presents an analysis of problems of linear elastic fracture mechanics in anisotropic bimaterial structures. Using the boundary element method, it is possible to evaluate stress intensity factors in plane problems (2D) due to the presence of interfacial cracks between the laminae that constitute the material, when the structure is submitted to a m
Publicado em: 2008
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10. Modelos computacionais para o escalonamento de tarefas em redes de dutos / Computational models for task scheduling in pipeline networks
This dissertation deals with a very difficult overly-constrained scheduling challenge: how to operate a large pipeline network in order to adequately transport oil derivatives and biofuels from refineries to local markets. Pipeline network systems are considered the major option for transporting these product types, in view of their many economic and environ
Publicado em: 2008
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11. Critical rains, planning and run-off management using geografic information system on Presidente Bernardes - Cubatão Refinery (RPBC) / Precipitações criticas, planejamento e gerenciamento das drenagens superficiais utilizando sistemas de informações geograficas : Refinaria Presidente Bernardes - Cubatão (RPBC)
The increase on the rains intensity veryfied on last decades has requested the conveyances over than their capacity, showing deficiencies on old designed systems. At the same time, society has the crying need of water resources conservation, justified by the water s scarcity. In an oil refinery this subject is particularly important because of the great amou
Publicado em: 2008
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12. Otimização da programação de curto prazo de duto bidirecional de derivados de petróleo. / Short-term scheduling optimization of derivative petroleum bidirectional pipeline.
Pipeline systems play a major role in the supply chain of the petroleum industry. These systems are responsible for the transportation of most of the crude oil and petroleum derivatives. Pipeline systems transfer large amounts of different petroleum types and their products at a lower cost than any other transportation mode. Pipelines interconnect oil fields
Publicado em: 2007