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Iron oxide reduction by graphite and torrefied biomass analyzed by TG-FTIR for mitigating CO2 emissions

Biomass provides a sustainable source for iron oxide reduction and can replace coal for mitigating CO2 emissions. Torrefied biomass can act as a reducing agent in the iron oxide reduction to metallic iron which is important in chemical-looping combustion for lessening CO2 emissions. This study perfo...

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Main Authors:	Ubando, Aristotle T., Chen, Wei-Hsin, Ong, Hwai Chyuan
Format:	Article
Published:	Elsevier 2019
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.um.edu.my/23220/ https://doi.org/10.1016/j.energy.2019.05.149
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id	my.um.eprints.23220
record_format	eprints
spelling	my.um.eprints.232202019-12-16T03:14:46Z http://eprints.um.edu.my/23220/ Iron oxide reduction by graphite and torrefied biomass analyzed by TG-FTIR for mitigating CO2 emissions Ubando, Aristotle T. Chen, Wei-Hsin Ong, Hwai Chyuan TJ Mechanical engineering and machinery Biomass provides a sustainable source for iron oxide reduction and can replace coal for mitigating CO2 emissions. Torrefied biomass can act as a reducing agent in the iron oxide reduction to metallic iron which is important in chemical-looping combustion for lessening CO2 emissions. This study performs iron oxide reduction by graphite and torrefied biomass via thermogravimetric analysis (TGA), while the evolved gases from the reduction processes are analyzed using a Fourier transform infrared (FTIR) spectrometer. Iron ore reduction by graphite occurs at higher temperatures (>950 °C), whereas iron oxide reduction using the torrefied biomass is more significant for low-to medium-range temperatures with an onset temperature of 300 °C. The reduction extent is recognized from the comparison between theoretical and experimental TGA curves, and validated by the evolved gases. The reduction extent of the 2:1 ratio of hematite-to-torrefied biomass shows a lower onset reduction temperature compared to the 1:1 ratio. The TG-FTIR results confirm the direct reduction of iron oxides by carbon in graphite and torrefied biomass and the release of evolved CO2 instead of CO. A step-wise reduction procedure is observed which is triggered by the evolved gases released from torrefied biomass devolatilization at 370 °C. © 2019 Elsevier Ltd Elsevier 2019 Article PeerReviewed Ubando, Aristotle T. and Chen, Wei-Hsin and Ong, Hwai Chyuan (2019) Iron oxide reduction by graphite and torrefied biomass analyzed by TG-FTIR for mitigating CO2 emissions. Energy, 180. pp. 968-977. ISSN 0360-5442 https://doi.org/10.1016/j.energy.2019.05.149 doi:10.1016/j.energy.2019.05.149
institution	Universiti Malaya
building	UM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Malaya
content_source	UM Research Repository
url_provider	http://eprints.um.edu.my/
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Ubando, Aristotle T. Chen, Wei-Hsin Ong, Hwai Chyuan Iron oxide reduction by graphite and torrefied biomass analyzed by TG-FTIR for mitigating CO2 emissions
description	Biomass provides a sustainable source for iron oxide reduction and can replace coal for mitigating CO2 emissions. Torrefied biomass can act as a reducing agent in the iron oxide reduction to metallic iron which is important in chemical-looping combustion for lessening CO2 emissions. This study performs iron oxide reduction by graphite and torrefied biomass via thermogravimetric analysis (TGA), while the evolved gases from the reduction processes are analyzed using a Fourier transform infrared (FTIR) spectrometer. Iron ore reduction by graphite occurs at higher temperatures (>950 °C), whereas iron oxide reduction using the torrefied biomass is more significant for low-to medium-range temperatures with an onset temperature of 300 °C. The reduction extent is recognized from the comparison between theoretical and experimental TGA curves, and validated by the evolved gases. The reduction extent of the 2:1 ratio of hematite-to-torrefied biomass shows a lower onset reduction temperature compared to the 1:1 ratio. The TG-FTIR results confirm the direct reduction of iron oxides by carbon in graphite and torrefied biomass and the release of evolved CO2 instead of CO. A step-wise reduction procedure is observed which is triggered by the evolved gases released from torrefied biomass devolatilization at 370 °C. © 2019 Elsevier Ltd
format	Article
author	Ubando, Aristotle T. Chen, Wei-Hsin Ong, Hwai Chyuan
author_facet	Ubando, Aristotle T. Chen, Wei-Hsin Ong, Hwai Chyuan
author_sort	Ubando, Aristotle T.
title	Iron oxide reduction by graphite and torrefied biomass analyzed by TG-FTIR for mitigating CO2 emissions
title_short	Iron oxide reduction by graphite and torrefied biomass analyzed by TG-FTIR for mitigating CO2 emissions
title_full	Iron oxide reduction by graphite and torrefied biomass analyzed by TG-FTIR for mitigating CO2 emissions
title_fullStr	Iron oxide reduction by graphite and torrefied biomass analyzed by TG-FTIR for mitigating CO2 emissions
title_full_unstemmed	Iron oxide reduction by graphite and torrefied biomass analyzed by TG-FTIR for mitigating CO2 emissions
title_sort	iron oxide reduction by graphite and torrefied biomass analyzed by tg-ftir for mitigating co2 emissions
publisher	Elsevier
publishDate	2019
url	http://eprints.um.edu.my/23220/ https://doi.org/10.1016/j.energy.2019.05.149
_version_	1654960704090800128
score	13.211869

Iron oxide reduction by graphite and torrefied biomass analyzed by TG-FTIR for mitigating CO2 emissions

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