Analysis of oxy-fuel combustion as an alternative to combustion with air in metal reheating furnaces


Autoria(s): Oliveira, Flavio Augusto Dias de; Carvalho Junior, João Andrade de; Magalhães Sobrinho, Pedro; Castro, André de
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

03/11/2015

03/11/2015

15/12/2014

Resumo

Using oxygen instead of air in a burning process is at present being widely discussed as an option to reduce CO2 emissions. One of the possibilities is to maintain the combustion reaction at the same energy release level as burning with air, which reduces fuel consumption and the emission rates of CO2. A thermal simulation was made for metal reheating furnaces, which operate at a temperature in the range of 1150-1250 degrees C, using natural gas with a 5% excess of oxygen, maintaining fixed values for pressure and combustion temperature. The theoretical results show that it is possible to reduce the consumption of fuel, and this reduction depends on the amount of heat that can be recovered during the air pre-heating process. The analysis was further conducted by considering the 2012 costs of natural gas and oxygen in Brazil. The use of oxygen showed to be economically viable for large furnaces that operate with conventional heat recovering systems (those that provide pre-heated air at temperatures near 400 degrees C). (C) 2014 Elsevier Ltd. All rights reserved.

Formato

290-297

Identificador

http://www.sciencedirect.com/science/article/pii/S0360544214011591

Energy. Oxford: Pergamon-elsevier Science Ltd, v. 78, p. 290-297, 2014.

0360-5442

http://hdl.handle.net/11449/130319

http://dx.doi.org/10.1016/j.energy.2014.10.010

WOS:000347579200031

Idioma(s)

eng

Publicador

Elsevier B.V.

Relação

Energy

Direitos

closedAccess

Palavras-Chave #Oxy-fuel combustion #Fuel consumption #Reheating furnaces
Tipo

info:eu-repo/semantics/article