Factorial design application to evaluate thermochemical conversion of shredder residues

[Display omitted] •A detailed study of SR pyrolysis using a 2k factorial design was conducted.•Lower heating rate resulted in higher non-condensable gas yields.•CaO was efficient for CO2 capture in non-condensable gas.•Pyrolysis process presented high potential for SR reuse. Among the different wast...

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Bibliographic Details
Published in:Process safety and environmental protection 2018-02, Vol.114, p.97-106
Main Authors: Perondi, Daniele, Restelatto, Danielle, Manera, Christian, Dettmer, Aline, Godinho, Marcelo, Faria Vilela, Antônio Cezar
Format: Article
Language:English
Subjects:
Calorific value
Carbon dioxide
Carbon sequestration
Conversion
Data processing
Energy recovery and waste treatment
Factorial design
Factorial experiments
Flow rates
Flow velocity
Heating rate
Industrial wastes
Iron and steel industry
Landfills
Pyrolysis
Rare gases
Shredder residue
Steel
Steel industry
Studies
Styrene
Waste disposal
Waste disposal sites
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Summary:[Display omitted] •A detailed study of SR pyrolysis using a 2k factorial design was conducted.•Lower heating rate resulted in higher non-condensable gas yields.•CaO was efficient for CO2 capture in non-condensable gas.•Pyrolysis process presented high potential for SR reuse. Among the different wastes generated by steel industry, there is the shredder residue (SR). SR is a highly heterogeneous mixture, which is most commonly destined to a landfill of industrial waste by the Brazilian steel industry. Considering the high variation of its composition, the use of statistical tools is recommended to obtain consistent data. Pyrolysis can be considered a solution to dispose of this residue. This work aimed at evaluating the SR pyrolysis process using a 2k factorial design. The following variables were investigated: temperature, heating rate, inert gas (N2) flow rate, and CaO/SR ratio. Lower heating rate resulted in higher non-condensable gas yields (>50% w/w). CaO was efficient for CO2 capture in non-condensable gas, thus increasing calorific value. Higher heating rate resulted in higher condensable vapor yields, and the main compound found in this stream was styrene. The thermochemical conversion process, through pyrolysis, presented high potential for SR reuse rather than the disposal in landfills.
ISSN:0957-5820
1744-3598
DOI:10.1016/j.psep.2017.12.011