Predicting carbon conversion in fluidized bed gasification of biomass

J. Kramb, J.T. Konttinen, Antero Moilanen, Jere Lehtinen, N. Demartin

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsProfessional

Abstract

There is increased interest in biomass gasification for production of a gas which can substitute for fossil fuel, for instance in lime kilns. High system efficiency requires good carbon conversion in the gasifier. When a solid fuel particle is injected into a hot fluidized bed, the reactivity of the resulting char in gasification reactions (between char carbon and steam and CO2 as well as the inhibiting reactions of product gases H2 and CO) play a significant role in reaching good carbon conversion. In this paper, the gasification reactivity data of biomass chars, as measured in TGA experiments, is used for the determination of kinetic parameters for char carbon gasification reactivity correlations. The complicated ash-carbon interactions during char gasification are currently being studied. Laboratory measured reactivity values from TGA experiments are used in the Carbon Conversion predictor to simulate carbon conversion in a real scale fluidized bed gasifier. The predictor is a relatively simple and transparent tool for the comparison of the gasification reactivity of different fuels in fluidized bed gasification. Simulations against some pilot-scale results show reasonable agreement.
Original languageEnglish
Title of host publicationProceedings
Subtitle of host publication8th International Black Liquor Colloquium, Black Liquor and Biomassa to Bioenergy and Biofules
Publication statusPublished - 2013
MoE publication typeD3 Professional conference proceedings
Event8th International Black Liquor Colloquium, Black Liquor and Biomassa to Bioenergy and Biofules - Belo Horizonte, Brazil
Duration: 19 May 201323 May 2013

Conference

Conference8th International Black Liquor Colloquium, Black Liquor and Biomassa to Bioenergy and Biofules
CountryBrazil
CityBelo Horizonte
Period19/05/1323/05/13

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Gasification
Fluidized beds
Biomass
Carbon
Kilns
Gases
Fossil fuels
Kinetic parameters
Lime
Coal ash
Steam
Experiments

Cite this

Kramb, J., Konttinen, J. T., Moilanen, A., Lehtinen, J., & Demartin, N. (2013). Predicting carbon conversion in fluidized bed gasification of biomass. In Proceedings: 8th International Black Liquor Colloquium, Black Liquor and Biomassa to Bioenergy and Biofules
Kramb, J. ; Konttinen, J.T. ; Moilanen, Antero ; Lehtinen, Jere ; Demartin, N. / Predicting carbon conversion in fluidized bed gasification of biomass. Proceedings: 8th International Black Liquor Colloquium, Black Liquor and Biomassa to Bioenergy and Biofules. 2013.
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Kramb, J, Konttinen, JT, Moilanen, A, Lehtinen, J & Demartin, N 2013, Predicting carbon conversion in fluidized bed gasification of biomass. in Proceedings: 8th International Black Liquor Colloquium, Black Liquor and Biomassa to Bioenergy and Biofules. 8th International Black Liquor Colloquium, Black Liquor and Biomassa to Bioenergy and Biofules, Belo Horizonte, Brazil, 19/05/13.

Predicting carbon conversion in fluidized bed gasification of biomass. / Kramb, J.; Konttinen, J.T.; Moilanen, Antero; Lehtinen, Jere; Demartin, N.

Proceedings: 8th International Black Liquor Colloquium, Black Liquor and Biomassa to Bioenergy and Biofules. 2013.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsProfessional

TY - GEN

T1 - Predicting carbon conversion in fluidized bed gasification of biomass

AU - Kramb, J.

AU - Konttinen, J.T.

AU - Moilanen, Antero

AU - Lehtinen, Jere

AU - Demartin, N.

PY - 2013

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N2 - There is increased interest in biomass gasification for production of a gas which can substitute for fossil fuel, for instance in lime kilns. High system efficiency requires good carbon conversion in the gasifier. When a solid fuel particle is injected into a hot fluidized bed, the reactivity of the resulting char in gasification reactions (between char carbon and steam and CO2 as well as the inhibiting reactions of product gases H2 and CO) play a significant role in reaching good carbon conversion. In this paper, the gasification reactivity data of biomass chars, as measured in TGA experiments, is used for the determination of kinetic parameters for char carbon gasification reactivity correlations. The complicated ash-carbon interactions during char gasification are currently being studied. Laboratory measured reactivity values from TGA experiments are used in the Carbon Conversion predictor to simulate carbon conversion in a real scale fluidized bed gasifier. The predictor is a relatively simple and transparent tool for the comparison of the gasification reactivity of different fuels in fluidized bed gasification. Simulations against some pilot-scale results show reasonable agreement.

AB - There is increased interest in biomass gasification for production of a gas which can substitute for fossil fuel, for instance in lime kilns. High system efficiency requires good carbon conversion in the gasifier. When a solid fuel particle is injected into a hot fluidized bed, the reactivity of the resulting char in gasification reactions (between char carbon and steam and CO2 as well as the inhibiting reactions of product gases H2 and CO) play a significant role in reaching good carbon conversion. In this paper, the gasification reactivity data of biomass chars, as measured in TGA experiments, is used for the determination of kinetic parameters for char carbon gasification reactivity correlations. The complicated ash-carbon interactions during char gasification are currently being studied. Laboratory measured reactivity values from TGA experiments are used in the Carbon Conversion predictor to simulate carbon conversion in a real scale fluidized bed gasifier. The predictor is a relatively simple and transparent tool for the comparison of the gasification reactivity of different fuels in fluidized bed gasification. Simulations against some pilot-scale results show reasonable agreement.

M3 - Conference article in proceedings

BT - Proceedings

ER -

Kramb J, Konttinen JT, Moilanen A, Lehtinen J, Demartin N. Predicting carbon conversion in fluidized bed gasification of biomass. In Proceedings: 8th International Black Liquor Colloquium, Black Liquor and Biomassa to Bioenergy and Biofules. 2013