Experimental investigations on spontaneous combustion of pulverized coal in the oxyfuel combustion system

CCS (Carbon Dioxide Capture and Storage) is one of the technologies able to adequately displace CO2 from fossil fuel fired power plants and the only technology capable of reducing large-scale emissions. In particular, coal emits a lot of CO2, although it is an important energy resource in terms of e...

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Autores principales:	Takashi KIGA, Mizuki NISHIMURA, Akihiro KOMAKI, Wonyoung CHOI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2020
Materias:	oxyfuel coal coal fired power plant carbon dioxide capture and storage (ccs) co2 spontaneous combustion Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/0a70d24641034dee97ffe6e1843301a6
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spelling	oai:doaj.org-article:0a70d24641034dee97ffe6e1843301a62021-11-29T06:02:35ZExperimental investigations on spontaneous combustion of pulverized coal in the oxyfuel combustion system2187-974510.1299/mej.20-00114https://doaj.org/article/0a70d24641034dee97ffe6e1843301a62020-10-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/7/6/7_20-00114/_pdf/-char/enhttps://doaj.org/toc/2187-9745CCS (Carbon Dioxide Capture and Storage) is one of the technologies able to adequately displace CO2 from fossil fuel fired power plants and the only technology capable of reducing large-scale emissions. In particular, coal emits a lot of CO2, although it is an important energy resource in terms of energy security. To address this situation, IHI had developed oxyfuel combustion technology to capture CO2 from coal-fired power plants, and the demonstration using a 30MWe unit in Australia was successfully carried out. In order to commercialize the technology widely, how to configure the primary gas system is one of the important examination items. When adding oxygen into the primary gas system, depending on the type of mill, pulverized coal deposited in the mill may ignite spontaneously. To investigate the spontaneous combustion characteristics of the deposited pulverized coal under oxyfuel conditions, therefore, laboratory-scale experiments were carried out. The pulverized coal was deposited in a 100mm square mesh box, and it was installed in a thermostatic chamber. Then the mixed gas of N2/O2 or CO2/O2 was introduced into the chamber, and the temperature in the coal sample was measured. From the results, there was little temperature difference at which spontaneous combustion occurred between N2/O2 and CO2/O2 atmosphere, while there was a tendency that it might be relatively hard to occur under CO2/O2 atmosphere. The results also showed a tendency that the influence of temperature was stronger than the oxygen concentration.Takashi KIGAMizuki NISHIMURAAkihiro KOMAKIWonyoung CHOIThe Japan Society of Mechanical Engineersarticleoxyfuelcoalcoal fired power plantcarbon dioxide capture and storage (ccs)co2spontaneous combustionMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 7, Iss 6, Pp 20-00114-20-00114 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	oxyfuel coal coal fired power plant carbon dioxide capture and storage (ccs) co2 spontaneous combustion Mechanical engineering and machinery TJ1-1570
spellingShingle	oxyfuel coal coal fired power plant carbon dioxide capture and storage (ccs) co2 spontaneous combustion Mechanical engineering and machinery TJ1-1570 Takashi KIGA Mizuki NISHIMURA Akihiro KOMAKI Wonyoung CHOI Experimental investigations on spontaneous combustion of pulverized coal in the oxyfuel combustion system
description	CCS (Carbon Dioxide Capture and Storage) is one of the technologies able to adequately displace CO2 from fossil fuel fired power plants and the only technology capable of reducing large-scale emissions. In particular, coal emits a lot of CO2, although it is an important energy resource in terms of energy security. To address this situation, IHI had developed oxyfuel combustion technology to capture CO2 from coal-fired power plants, and the demonstration using a 30MWe unit in Australia was successfully carried out. In order to commercialize the technology widely, how to configure the primary gas system is one of the important examination items. When adding oxygen into the primary gas system, depending on the type of mill, pulverized coal deposited in the mill may ignite spontaneously. To investigate the spontaneous combustion characteristics of the deposited pulverized coal under oxyfuel conditions, therefore, laboratory-scale experiments were carried out. The pulverized coal was deposited in a 100mm square mesh box, and it was installed in a thermostatic chamber. Then the mixed gas of N2/O2 or CO2/O2 was introduced into the chamber, and the temperature in the coal sample was measured. From the results, there was little temperature difference at which spontaneous combustion occurred between N2/O2 and CO2/O2 atmosphere, while there was a tendency that it might be relatively hard to occur under CO2/O2 atmosphere. The results also showed a tendency that the influence of temperature was stronger than the oxygen concentration.
format	article
author	Takashi KIGA Mizuki NISHIMURA Akihiro KOMAKI Wonyoung CHOI
author_facet	Takashi KIGA Mizuki NISHIMURA Akihiro KOMAKI Wonyoung CHOI
author_sort	Takashi KIGA
title	Experimental investigations on spontaneous combustion of pulverized coal in the oxyfuel combustion system
title_short	Experimental investigations on spontaneous combustion of pulverized coal in the oxyfuel combustion system
title_full	Experimental investigations on spontaneous combustion of pulverized coal in the oxyfuel combustion system
title_fullStr	Experimental investigations on spontaneous combustion of pulverized coal in the oxyfuel combustion system
title_full_unstemmed	Experimental investigations on spontaneous combustion of pulverized coal in the oxyfuel combustion system
title_sort	experimental investigations on spontaneous combustion of pulverized coal in the oxyfuel combustion system
publisher	The Japan Society of Mechanical Engineers
publishDate	2020
url	https://doaj.org/article/0a70d24641034dee97ffe6e1843301a6
work_keys_str_mv	AT takashikiga experimentalinvestigationsonspontaneouscombustionofpulverizedcoalintheoxyfuelcombustionsystem AT mizukinishimura experimentalinvestigationsonspontaneouscombustionofpulverizedcoalintheoxyfuelcombustionsystem AT akihirokomaki experimentalinvestigationsonspontaneouscombustionofpulverizedcoalintheoxyfuelcombustionsystem AT wonyoungchoi experimentalinvestigationsonspontaneouscombustionofpulverizedcoalintheoxyfuelcombustionsystem
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Experimental investigations on spontaneous combustion of pulverized coal in the oxyfuel combustion system

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