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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...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2022
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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). |
format | Online Article Text |
id | pubmed-9404462 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
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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