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Pyrolysis Behavior of Pyrite under a CO–H(2) Atmosphere

[Image: see text] The transformation behavior of pyrite (FeS(2)) in the blast furnace process is critical to control the formation and emission of gaseous sulfides in the top gas of ironmaking but has seldom been explored. In present work, the pyrolysis of pyrite from 200 to 900 °C under a CO–H(2) a...

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Autores principales: Zheng, Zhuang, You, Yang, Guo, Jiabao, Li, Gang, You, Zhixiong, Lv, Xuewei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9404462/
https://www.ncbi.nlm.nih.gov/pubmed/36033700
http://dx.doi.org/10.1021/acsomega.2c02991
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author Zheng, Zhuang
You, Yang
Guo, Jiabao
Li, Gang
You, Zhixiong
Lv, Xuewei
author_facet Zheng, Zhuang
You, Yang
Guo, Jiabao
Li, Gang
You, Zhixiong
Lv, Xuewei
author_sort Zheng, Zhuang
collection PubMed
description [Image: see text] The transformation behavior of pyrite (FeS(2)) in the blast furnace process is critical to control the formation and emission of gaseous sulfides in the top gas of ironmaking but has seldom been explored. In present work, the pyrolysis of pyrite from 200 to 900 °C under a CO–H(2) atmosphere was investigated by thermal-gravimetric and mass spectrometry. The thermodynamic theoretical calculations were carried out to further understand the transformation process. The results show that FeS(2) is almost completely reduced to FeS under various CO–H(2) atmospheres. H(2)S and carbonyl sulfide (COS) are the main gaseous sulfides formed through the pyrolysis reactions of FeS(2) under a CO–H(2) atmosphere. A higher H(2) concentration can reduce the pyrolysis reaction temperature of FeS(2), which is favorable for the conversion of sulfides to H(2)S, while a higher CO concentration promotes the conversion of sulfides to COS. Besides, the pyrolysis products of FeS(2) by order from the former to latter under a strong reductive atmosphere (CO–H(2)) with increasing temperature are as follows: COS → S → H(2)S → S(2) → CS(2).
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spelling pubmed-94044622022-08-26 Pyrolysis Behavior of Pyrite under a CO–H(2) Atmosphere Zheng, Zhuang You, Yang Guo, Jiabao Li, Gang You, Zhixiong Lv, Xuewei ACS Omega [Image: see text] The transformation behavior of pyrite (FeS(2)) in the blast furnace process is critical to control the formation and emission of gaseous sulfides in the top gas of ironmaking but has seldom been explored. In present work, the pyrolysis of pyrite from 200 to 900 °C under a CO–H(2) atmosphere was investigated by thermal-gravimetric and mass spectrometry. The thermodynamic theoretical calculations were carried out to further understand the transformation process. The results show that FeS(2) is almost completely reduced to FeS under various CO–H(2) atmospheres. H(2)S and carbonyl sulfide (COS) are the main gaseous sulfides formed through the pyrolysis reactions of FeS(2) under a CO–H(2) atmosphere. A higher H(2) concentration can reduce the pyrolysis reaction temperature of FeS(2), which is favorable for the conversion of sulfides to H(2)S, while a higher CO concentration promotes the conversion of sulfides to COS. Besides, the pyrolysis products of FeS(2) by order from the former to latter under a strong reductive atmosphere (CO–H(2)) with increasing temperature are as follows: COS → S → H(2)S → S(2) → CS(2). American Chemical Society 2022-08-08 /pmc/articles/PMC9404462/ /pubmed/36033700 http://dx.doi.org/10.1021/acsomega.2c02991 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by-nc-nd/4.0/Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Zheng, Zhuang
You, Yang
Guo, Jiabao
Li, Gang
You, Zhixiong
Lv, Xuewei
Pyrolysis Behavior of Pyrite under a CO–H(2) Atmosphere
title Pyrolysis Behavior of Pyrite under a CO–H(2) Atmosphere
title_full Pyrolysis Behavior of Pyrite under a CO–H(2) Atmosphere
title_fullStr Pyrolysis Behavior of Pyrite under a CO–H(2) Atmosphere
title_full_unstemmed Pyrolysis Behavior of Pyrite under a CO–H(2) Atmosphere
title_short Pyrolysis Behavior of Pyrite under a CO–H(2) Atmosphere
title_sort pyrolysis behavior of pyrite under a co–h(2) atmosphere
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9404462/
https://www.ncbi.nlm.nih.gov/pubmed/36033700
http://dx.doi.org/10.1021/acsomega.2c02991
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