A novel slag carbon arrestor process for energy recovery in steelmaking industry

Zhou, C, Tremain, P, Doroodchi, E, Moghtaderi, B and Shah, K 2017, 'A novel slag carbon arrestor process for energy recovery in steelmaking industry', Fuel Processing Technology, vol. 155, pp. 124-133.


Document type: Journal Article
Collection: Journal Articles

Title A novel slag carbon arrestor process for energy recovery in steelmaking industry
Author(s) Zhou, C
Tremain, P
Doroodchi, E
Moghtaderi, B
Shah, K
Year 2017
Journal name Fuel Processing Technology
Volume number 155
Start page 124
End page 133
Total pages 10
Publisher Elsevier BV
Abstract A novel slag carbon arrestor process (SCAP) was proposed to improve the heat recovery in energy-intensive steelmaking process, which typically has a low heat recovery. The proposed SCAP process introduces a tar reformer to utilise the slag - a by-product from steelmaking process - as the catalyst to convert coke oven gas and tar into hydrogen-enriched fuel gas. This is achieved by making use of the valuable carbon and/or energy contained in the coke oven gas, which otherwise being wasted, to assist in tar reforming and produce hydrogen-enriched gas. Such concept is expected to reduce the undesired tar formation in steelmaking process along with improved heat recovery efficiency and higher quality coke oven gas production. Both simulation and experimental studies on the slag carbon arrestor process were performed. The preliminary thermodynamic analysis carried out using Aspen Plus v8.4 indicates that with the tar reformer the energy content of coke oven gas was found increased from ~ 34.6 MJ/kg to ~ 37.7 MJ/kg (or by 9%). Also, with the utilisation of carbon deposition on the slag, a reduction of up to 12.8% coke usage in the steelmaking process can be achieved. This corresponds to an energy saving of 4% and a carbon emission reduction of 5.7% compared with the conventional steelmaking process. Preliminary experimental TGA-FTIR investigations revealed a reduction in the aromatic and aliphatic hydrocarbon groups and an increase in the production of CO2 and CO, attributed to the tar cracking abilities of slag.
Subject Energy Generation, Conversion and Storage Engineering
Non-automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels)
Chemical Engineering not elsewhere classified
Keyword(s) Carbon deposition
Coke oven gas
Slag carbon arrestor process (SCAP)
Steelmaking
Tar
DOI - identifier 10.1016/j.fuproc.2016.05.006
Copyright notice © 2016 Elsevier B.V. All rights reserved.
ISSN 0378-3820
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