Emprego da minimização da energia de Gibbs para predizer a composição dos gases de exaustão oriundos de uma caldeira que utiliza como combustíveis subprodutos gerados na indústria siderúrgica

• Ano de defesa: 2016
• Autor(a) principal: Turetta, Leticia Fabri
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso embargado
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Engenharia Química; UFES; Programa de Pós-Graduação em Engenharia Química
• Palavras-chave em Português: Composição dos gases de exaustão; Siderurgia; Gases - Composição; Gibbs, Energia livre de; Engenharia Química; 66.0
• Link de acesso: http://repositorio.ufes.br/handle/10/5114

The development of the steel industry has increased energy demand, exerting strong influence on the use of energy resources. The utilization energetic is extremely important because it enables the steel industry greatly reduce their costs. In the steelmaking process, they are produced four by-products with high capacity for energy generation. The produced by-products are directed to thermoelectric plants and used as fuel for the generation of electricity. In this work it proposed a modeling for the prediction of the equilibrium concentration of the chemical species present in the furnace of a steel boiler installed in a thermoelectric plant. The employed technique consists of the minimization of the Gibbs energy of the reaction medium present in the furnace of steel boiler equipment on the thermoelectric central plant. The optimization problem was proposed, by defining thus the objective function and restrictions to be resolved employing the commercial software Matlab® . The solution of the optimization problem resultant provides the description of composition output of the exhaust gases. This work it was possible to evaluate the impact of changes in air feed flow rate and operating temperature of the composition of the exhaust gases. The applied methodology is able to reproduce satisfactorily the information provided by industry and obtained in the literature, that describe the combustion of the byproducts on the steel industry by-products.