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Pyrolysis Characteristics of Industrial Lignin for Use as a Reductant and an Energy Source for Future Iron Making

[Image: see text] The purpose of this study is to explore the possibility of using industrial lignin instead of pulverized coal as a reducing agent for the production of direct reduced iron (DRI), thus reducing CO(2) emissions. The pyrolysis characteristics and kinetics of pulverized coal and indust...

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Autores principales: Xiang, Dongwen, Shen, Fengman, Jiang, Xin, An, Haiwei, Zheng, Haiyan, Gao, Qiangjian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7876697/
https://www.ncbi.nlm.nih.gov/pubmed/33585741
http://dx.doi.org/10.1021/acsomega.0c05052
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author Xiang, Dongwen
Shen, Fengman
Jiang, Xin
An, Haiwei
Zheng, Haiyan
Gao, Qiangjian
author_facet Xiang, Dongwen
Shen, Fengman
Jiang, Xin
An, Haiwei
Zheng, Haiyan
Gao, Qiangjian
author_sort Xiang, Dongwen
collection PubMed
description [Image: see text] The purpose of this study is to explore the possibility of using industrial lignin instead of pulverized coal as a reducing agent for the production of direct reduced iron (DRI), thus reducing CO(2) emissions. The pyrolysis characteristics and kinetics of pulverized coal and industrial lignin were studied by nonisothermal thermogravimetry. In the three stages of pyrolysis, the weight loss rate of industrial lignin is higher than that of pulverized coal. The volatile matter of industrial lignin is easier to release than that of pulverized coal, but the coking process is longer than that of pulverized coal. The activation energies of pyrolysis of Lu’an anthracite (LA), Shen’mu bituminous coal (SM), alkali lignin (AL), and magnesium lignosulfonate (ML) were 71.10, 70.30, 55.20, and 37.34 kJ·mol(–1) at the middle-temperature stage, and 133.64, 98.31, 57.78, and 46.68 kJ·mol(–1) at the high-temperature stage, respectively. After pyrolysis, a few nanometer thick carbon film structure appears in alkali lignin coke, which is conducive to the reduction of iron ore powder.
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spelling pubmed-78766972021-02-12 Pyrolysis Characteristics of Industrial Lignin for Use as a Reductant and an Energy Source for Future Iron Making Xiang, Dongwen Shen, Fengman Jiang, Xin An, Haiwei Zheng, Haiyan Gao, Qiangjian ACS Omega [Image: see text] The purpose of this study is to explore the possibility of using industrial lignin instead of pulverized coal as a reducing agent for the production of direct reduced iron (DRI), thus reducing CO(2) emissions. The pyrolysis characteristics and kinetics of pulverized coal and industrial lignin were studied by nonisothermal thermogravimetry. In the three stages of pyrolysis, the weight loss rate of industrial lignin is higher than that of pulverized coal. The volatile matter of industrial lignin is easier to release than that of pulverized coal, but the coking process is longer than that of pulverized coal. The activation energies of pyrolysis of Lu’an anthracite (LA), Shen’mu bituminous coal (SM), alkali lignin (AL), and magnesium lignosulfonate (ML) were 71.10, 70.30, 55.20, and 37.34 kJ·mol(–1) at the middle-temperature stage, and 133.64, 98.31, 57.78, and 46.68 kJ·mol(–1) at the high-temperature stage, respectively. After pyrolysis, a few nanometer thick carbon film structure appears in alkali lignin coke, which is conducive to the reduction of iron ore powder. American Chemical Society 2021-01-26 /pmc/articles/PMC7876697/ /pubmed/33585741 http://dx.doi.org/10.1021/acsomega.0c05052 Text en © 2021 The Authors. Published by American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes.
spellingShingle Xiang, Dongwen
Shen, Fengman
Jiang, Xin
An, Haiwei
Zheng, Haiyan
Gao, Qiangjian
Pyrolysis Characteristics of Industrial Lignin for Use as a Reductant and an Energy Source for Future Iron Making
title Pyrolysis Characteristics of Industrial Lignin for Use as a Reductant and an Energy Source for Future Iron Making
title_full Pyrolysis Characteristics of Industrial Lignin for Use as a Reductant and an Energy Source for Future Iron Making
title_fullStr Pyrolysis Characteristics of Industrial Lignin for Use as a Reductant and an Energy Source for Future Iron Making
title_full_unstemmed Pyrolysis Characteristics of Industrial Lignin for Use as a Reductant and an Energy Source for Future Iron Making
title_short Pyrolysis Characteristics of Industrial Lignin for Use as a Reductant and an Energy Source for Future Iron Making
title_sort pyrolysis characteristics of industrial lignin for use as a reductant and an energy source for future iron making
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7876697/
https://www.ncbi.nlm.nih.gov/pubmed/33585741
http://dx.doi.org/10.1021/acsomega.0c05052
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