Ash transformation mechanism during combustion of rice husk and rice straw

dc.bibliographicCitation.firstPage121768eng
dc.bibliographicCitation.volume307eng
dc.contributor.authorBeidaghy Dizaji, Hossein
dc.contributor.authorZeng, Thomas
dc.contributor.authorHölzig, Hieronymus
dc.contributor.authorBauer, Jens
dc.contributor.authorKlöß, Gert
dc.contributor.authorEnke, Dirk
dc.date.accessioned2022-02-11T09:44:11Z
dc.date.available2022-02-11T09:44:11Z
dc.date.issued2022
dc.description.abstractBiomass is an alternative energy resource to fossil fuels because of its potential to reduce greenhouse gas emissions. However, ash-related problems are serious obstacles for this development, especially for the use in combustion plants. Thus, design and operation of biomass boilers require detailed understanding of ash transformation reactions during thermochemical conversion. To evaluate ash transformation in silica-rich biomass fuels, rice husk and rice straw were selected because of their abundance, limited utilization conflicts with the food sector, as well as their potential in both energy and material applications. This paper reveals ash transformation mechanisms relevant for the ash melting behaviour of silica-rich biomass fuels considering chemical and phase composition of the ashes. In this regard, several advanced spectroscopic methods and diffractometry were employed to characterize the materials. The ash transformation reactions and the viscosity were simulated using thermodynamic equilibrium calculations and a slag viscosity modeling toolbox. The results illustrate the impact of impurities on the atomic structure of the silica resulting in an altered ash melting behaviour and viscosity of the silica-rich ashes. Chemical water washing, acid leaching, and blending of rice straw with rice husk strongly influenced the chemical composition of the ashes and improved ash melting behaviour. The analysis also revealed the correlation between the crystalline fraction and the porosity in silica-rich biomass ashes, as well as a crystallinity threshold. These findings are highly relevant for future investigations in boiler designs and production of biogenic silica for material applications.eng
dc.description.versionpublishedVersioneng
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/8017
dc.identifier.urihttps://doi.org/10.34657/7058
dc.language.isoengeng
dc.publisherNew York, NY [u.a.] : Elseviereng
dc.relation.doihttps://doi.org/10.1016/j.fuel.2021.121768
dc.relation.essn1873-7153
dc.relation.ispartofseriesFuel : the science and technology of fuel and energy 307 (2022)eng
dc.rights.licenseCC BY 4.0 Unportedeng
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/eng
dc.subjectAsh transformationeng
dc.subjectAsh viscosityeng
dc.subjectCrystallinity thresholdeng
dc.subjectSilica-rich biomass combustioneng
dc.subjectThermodynamic equilibrium calculationeng
dc.subject.ddc660eng
dc.titleAsh transformation mechanism during combustion of rice husk and rice straweng
dc.typearticleeng
dc.typeText
dcterms.bibliographicCitation.journalTitleFuel : the science and technology of fuel and energyeng
tib.accessRightsopenAccesseng
wgl.contributorIOMeng
wgl.subjectChemieeng
wgl.typeZeitschriftenartikeleng
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
1-s2.0-S0016236121016483-main.pdf
Size:
9.02 MB
Format:
Adobe Portable Document Format
Description:
Collections