Combustion and gasification characteristics of low-temperature pyrolytic semi-coke prepared through atmosphere rich in CH4 and H2

Thermoanalysis was used in this research to produce a comparative study on the combustion and gasification characteristics of semi-coke prepared under pyrolytic atmospheres rich in CH4 and H2 at different proportions. Distinctions of different semi-coke in terms of carbon chemical structure, functio...

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Autores principales:	She Yuan, Zou Chong, Liu Shiwei, Wu Keng, Wu Hao, Ma Hongzhou, Shi Ruimeng
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	coal pyrolysis semi-coke blast furnace injection reactivity pore structure Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/33f02813014040d4ac76492fa5647622
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spelling	oai:doaj.org-article:33f02813014040d4ac76492fa56476222021-12-05T14:10:49ZCombustion and gasification characteristics of low-temperature pyrolytic semi-coke prepared through atmosphere rich in CH4 and H22191-955010.1515/gps-2021-0015https://doaj.org/article/33f02813014040d4ac76492fa56476222021-03-01T00:00:00Zhttps://doi.org/10.1515/gps-2021-0015https://doaj.org/toc/2191-9550Thermoanalysis was used in this research to produce a comparative study on the combustion and gasification characteristics of semi-coke prepared under pyrolytic atmospheres rich in CH4 and H2 at different proportions. Distinctions of different semi-coke in terms of carbon chemical structure, functional groups, and micropore structure were examined. The results indicated that adding some reducing gases during pyrolysis could inhibit semi-coke reactivity, the inhibitory effect of the composite gas of H2 and CH4 was the most observable, and the effect of H2 was higher than that of CH4; moreover, increasing the proportion of reducing gas increased its inhibitory effect. X-ray diffractometer and Fourier-transform infrared spectrometer results indicated that adding reducing gases in the atmosphere elevated the disordering degree of carbon microcrystalline structures, boosted the removal of hydroxyl- and oxygen-containing functional groups, decreased the unsaturated side chains, and improved condensation degree of macromolecular networks. The nitrogen adsorption experiment revealed that the types of pore structure of semi-coke are mainly micropore and mesopore, and the influence of pyrolytic atmosphere on micropores was not of strong regularity but could inhibit mesopore development. Aromatic lamellar stack height of semi-coke, specific surface area of mesopore, and pore volume had a favorable linear correlation with semi-coke reactivity indexes.She YuanZou ChongLiu ShiweiWu KengWu HaoMa HongzhouShi RuimengDe Gruyterarticlecoal pyrolysissemi-cokeblast furnace injectionreactivitypore structureChemistryQD1-999ENGreen Processing and Synthesis, Vol 10, Iss 1, Pp 189-200 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	coal pyrolysis semi-coke blast furnace injection reactivity pore structure Chemistry QD1-999
spellingShingle	coal pyrolysis semi-coke blast furnace injection reactivity pore structure Chemistry QD1-999 She Yuan Zou Chong Liu Shiwei Wu Keng Wu Hao Ma Hongzhou Shi Ruimeng Combustion and gasification characteristics of low-temperature pyrolytic semi-coke prepared through atmosphere rich in CH4 and H2
description	Thermoanalysis was used in this research to produce a comparative study on the combustion and gasification characteristics of semi-coke prepared under pyrolytic atmospheres rich in CH4 and H2 at different proportions. Distinctions of different semi-coke in terms of carbon chemical structure, functional groups, and micropore structure were examined. The results indicated that adding some reducing gases during pyrolysis could inhibit semi-coke reactivity, the inhibitory effect of the composite gas of H2 and CH4 was the most observable, and the effect of H2 was higher than that of CH4; moreover, increasing the proportion of reducing gas increased its inhibitory effect. X-ray diffractometer and Fourier-transform infrared spectrometer results indicated that adding reducing gases in the atmosphere elevated the disordering degree of carbon microcrystalline structures, boosted the removal of hydroxyl- and oxygen-containing functional groups, decreased the unsaturated side chains, and improved condensation degree of macromolecular networks. The nitrogen adsorption experiment revealed that the types of pore structure of semi-coke are mainly micropore and mesopore, and the influence of pyrolytic atmosphere on micropores was not of strong regularity but could inhibit mesopore development. Aromatic lamellar stack height of semi-coke, specific surface area of mesopore, and pore volume had a favorable linear correlation with semi-coke reactivity indexes.
format	article
author	She Yuan Zou Chong Liu Shiwei Wu Keng Wu Hao Ma Hongzhou Shi Ruimeng
author_facet	She Yuan Zou Chong Liu Shiwei Wu Keng Wu Hao Ma Hongzhou Shi Ruimeng
author_sort	She Yuan
title	Combustion and gasification characteristics of low-temperature pyrolytic semi-coke prepared through atmosphere rich in CH4 and H2
title_short	Combustion and gasification characteristics of low-temperature pyrolytic semi-coke prepared through atmosphere rich in CH4 and H2
title_full	Combustion and gasification characteristics of low-temperature pyrolytic semi-coke prepared through atmosphere rich in CH4 and H2
title_fullStr	Combustion and gasification characteristics of low-temperature pyrolytic semi-coke prepared through atmosphere rich in CH4 and H2
title_full_unstemmed	Combustion and gasification characteristics of low-temperature pyrolytic semi-coke prepared through atmosphere rich in CH4 and H2
title_sort	combustion and gasification characteristics of low-temperature pyrolytic semi-coke prepared through atmosphere rich in ch4 and h2
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/33f02813014040d4ac76492fa5647622
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Combustion and gasification characteristics of low-temperature pyrolytic semi-coke prepared through atmosphere rich in CH4 and H2

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