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Extension of the layer particle model for volumetric conversion reactions during char gasification

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dc.affiliation.dptoUC3M. Departamento de Ingeniería Térmica y de Fluidoses
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Ecuaciones Diferenciales y Aplicacioneses
dc.contributor.authorSteiner, Thomas
dc.contributor.authorSchulze, Kai
dc.contributor.authorScharler, Robert
dc.contributor.authorAnca Couce, Andres
dc.date.accessioned2024-01-15T19:01:08Z
dc.date.available2024-01-15T19:01:08Z
dc.date.issued2023-10-01
dc.description.abstractThe so-called 'layer model' or 'interface-based model' is a simplified single particle model, originally developed for shorter computation time during computational fluid dynamics (CFD) simulations. A reactive biomass particle is assumed to consist of successive layers, in which drying, pyrolysis and char conversion occur sequentially. The interfaces between these layers are the reaction fronts. The model has already been validated for drying, pyrolysis and char oxidation. Layer models in the literature have commonly employed surface reactions at the reaction front to describe char conversion. In this work, the suitability of this surface reaction concept is assessed when gasifying biochar. It is shown that a particular layer model, already available, which originally employed surface reactions, was unable to adequately describe the mass loss during gasification of a biochar. In order to overcome this incapability, the model was extended to consider volumetric reactions in the char layer. The influence of intraparticle diffusion was considered through an effectiveness factor. The model is easily adaptable for different gas-solid kinetic rate laws, while still allowing for comparably fast solutions of the model equations. The extended model was validated using theoretical calculations and experimental measurements from literature. It was demonstrated that intraparticle diffusion can significantly slow down the biochar gasification process. A general guideline for when to employ volumetric reactions, rather than surface reactions, and when to consider intraparticle diffusion is provided based on the Thiele modulus as the criterion.en
dc.description.sponsorshipAcknowledgments. The COMET Module BIO-LOOP (Austrian Research Promotion Agency Project Number 872189) is funded within COMET - Competence Centers for Excellent Technologies - by the Federal Ministry for Climate Action, Environment, Energy, Mobility, Innovation and Technology and the Federal Ministry for Digital and Economic Affairs as well as the co-financing federal province Styria. The COMET programme is managed by FFG (Austrian Research Promotion Agency, www.ffg.at/comet). The funding is gratefully acknowledged.en
dc.description.statusPublicadoes
dc.format.extent13
dc.identifier.bibliographicCitationSteiner, T., Schulze, K., Scharler, R., Anca-Couce, A. (2023).Extension of the layer particle model for volumetric conversion reactions during char gasification .Combustion and Flame, 256,112940 (13 p.). doi:10.1016/j.combustflame.2023.112940en
dc.identifier.doihttps://doi.org/10.1016/j.combustflame.2023.112940
dc.identifier.issn0010-2180
dc.identifier.publicationfirstpage1
dc.identifier.publicationlastpage13
dc.identifier.publicationtitleCombustion and Flameen
dc.identifier.publicationvolume256, 112940
dc.identifier.urihttps://hdl.handle.net/10016/39260
dc.identifier.uxxiAR/0000033873
dc.language.isoengen
dc.publisherElsevieren
dc.rights©2023 The Author(s). Published by Elsevier Inc. on behalf of The Combustion Institute.en
dc.rightsThis is an open access article under the CC BY licenseen
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.subject.ecienciaFísicaes
dc.subject.otherBiomassen
dc.subject.otherChar conversionen
dc.subject.otherEffectiveness factoren
dc.subject.otherGasificationen
dc.subject.otherParticle modelen
dc.subject.otherThermochemical conversionen
dc.titleExtension of the layer particle model for volumetric conversion reactions during char gasificationen
dc.typeresearch articleen
dc.type.hasVersionVoRen
dspace.entity.typePublication
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