6533b85dfe1ef96bd12be9d5

RESEARCH PRODUCT

Modeling biomass char gasification kinetics for improving prediction of carbon conversion in a fluidized bed gasifier

Jason KrambAntero MoilanenJukka KonttinenAlberto Gómez-bareaKentaro Umeki

subject

mallintaminenThermogravimetric analysisMaterials scienceGeneral Chemical EngineeringgasificationEnergy Engineering and Power TechnologyBiomasschemistry.chemical_elementResidence time (fluid dynamics)Energy engineeringFluidized bedkaasutusreaktiokinetiikkabiomassa (teollisuus)fluidized beBiomassCharta116Reaction kineticsWood gas generatorOrganic ChemistrykaasuuntuminenModelingmodelingFuel TechnologychemistryChemical engineeringFluidized bedreaction kineticsCarbonGasification

description

Gasification of biomass in a fluidized bed (FB) was modeled based on kinetic data obtained from previously conducted thermo- gravimetic 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 H 2 O / H 2 and CO 2 / 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. peerReviewed

yearjournalcountryeditionlanguage
2014-09-01Fuel
https://doi.org/10.1016/j.fuel.2014.04.014