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Modeling biomass char gasification kinetics for improving prediction of carbon conversion in a fluidized bed gasifier
Department of Chemistry, Renewable Energy Programme, University of Jyväskylä.
Department of Chemistry, Renewable Energy Programme, University of Jyväskylä.
Bioenergy Group, Chemical and Environmental Engineering Department, Escuela Superior de Ingenieros, University of Seville.
VTT Technical Research Centre of Finland, Espoo.
Vise andre og tillknytning
2014 (engelsk)Inngår i: Fuel, ISSN 0016-2361, E-ISSN 1873-7153, Vol. 132, s. 107-115Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Gasification of biomass in a fluidized bed (FB) was modeled based on kinetic data obtained from previously conducted thermogravimetric analysis. The thermogravimetric analysis experiments were designed to closely resemble conditions in a real FB gasifier by using high sample heating rates, in situ devolatilization and gas atmospheres of H2O/H2 and CO2/CO mixtures. Several char kinetic models were evaluated based on their ability to predict char conversion based on the thermogravimetric data. A modified version of the random pore model was shown to provide good fitting of the char reactivity and suitability for use in a reactor model. An updated FB reactor model which incorporates the newly developed char kinetic expression and a submodel for the estimation of char residence time is presented and results from simulations were compared against pilot scale gasification data of pine sawdust. The reactor model showed good ability for predicting char conversion and product gas composition.

sted, utgiver, år, opplag, sider
2014. Vol. 132, s. 107-115
HSV kategori
Forskningsprogram
Energiteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-4020DOI: 10.1016/j.fuel.2014.04.014ISI: 000336669500015Scopus ID: 2-s2.0-84901066137Lokal ID: 1dffc12c-76cb-4e27-ad13-53c0c06dd14eOAI: oai:DiVA.org:ltu-4020DiVA, id: diva2:976882
Merknad
Validerad; 2014; 20140502 (andbra)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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Umeki, Kentaro

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