Carbon conversion predictor for fluidized bed gasification of biomass fuels: From TGA measurements to char gasification particle model

J.T. Konttinen (Corresponding Author), Antero Moilanen, N. DeMartini, M. Hupa

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

When a solid fuel particle is injected into a hot fluidized bed, the reactivity of fuel char in gasification reactions (between char carbon and steam and CO2) plays a significant role for reaching a good carbon conversion. In this paper, the gasification reactivity data of some solid waste recovered fuels (SRF) obtained from thermogravimetric analysis (TGA) experiments is presented. Gas mixtures (H2O, H2, CO2, CO), were used in the experiments to find the inhibitive effects of CO and H2. Average char gasification reactivity values are determined from the TGA results. Kinetic parameters for char carbon gasification reactivity correlations are determined from this data. The Uniform Conversion model is used to account for the change of gasification reaction rate as function of carbon conversion. Some discrepancies, due to complicated ash–carbon interactions, are subjects of further research. In the carbon conversion predictor, laboratory measured reactivity numbers are converted into carbon conversion numbers 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. The residence times for solid fuels in fluidized bed gasifiers are simulated. Simulations against some pilot-scale results show reasonable agreement.
Original languageEnglish
Pages (from-to)265-274
JournalBiomass Conversion and Biorefinery
Volume2
Issue number3
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

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Gasification
Fluidized beds
Thermogravimetric analysis
Biomass
Carbon
Solid wastes
Kinetic parameters
Gas mixtures
Reaction rates
Steam
Experiments

Keywords

  • Fluidized bed gasification
  • char reactivity
  • modelling
  • thermogravimetric analyzer
  • solid recovered fuel

Cite this

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title = "Carbon conversion predictor for fluidized bed gasification of biomass fuels: From TGA measurements to char gasification particle model",
abstract = "When a solid fuel particle is injected into a hot fluidized bed, the reactivity of fuel char in gasification reactions (between char carbon and steam and CO2) plays a significant role for reaching a good carbon conversion. In this paper, the gasification reactivity data of some solid waste recovered fuels (SRF) obtained from thermogravimetric analysis (TGA) experiments is presented. Gas mixtures (H2O, H2, CO2, CO), were used in the experiments to find the inhibitive effects of CO and H2. Average char gasification reactivity values are determined from the TGA results. Kinetic parameters for char carbon gasification reactivity correlations are determined from this data. The Uniform Conversion model is used to account for the change of gasification reaction rate as function of carbon conversion. Some discrepancies, due to complicated ash–carbon interactions, are subjects of further research. In the carbon conversion predictor, laboratory measured reactivity numbers are converted into carbon conversion numbers 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. The residence times for solid fuels in fluidized bed gasifiers are simulated. Simulations against some pilot-scale results show reasonable agreement.",
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Carbon conversion predictor for fluidized bed gasification of biomass fuels : From TGA measurements to char gasification particle model. / Konttinen, J.T. (Corresponding Author); Moilanen, Antero; DeMartini, N.; Hupa, M.

In: Biomass Conversion and Biorefinery, Vol. 2, No. 3, 2012, p. 265-274.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Carbon conversion predictor for fluidized bed gasification of biomass fuels

T2 - From TGA measurements to char gasification particle model

AU - Konttinen, J.T.

AU - Moilanen, Antero

AU - DeMartini, N.

AU - Hupa, M.

PY - 2012

Y1 - 2012

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AB - When a solid fuel particle is injected into a hot fluidized bed, the reactivity of fuel char in gasification reactions (between char carbon and steam and CO2) plays a significant role for reaching a good carbon conversion. In this paper, the gasification reactivity data of some solid waste recovered fuels (SRF) obtained from thermogravimetric analysis (TGA) experiments is presented. Gas mixtures (H2O, H2, CO2, CO), were used in the experiments to find the inhibitive effects of CO and H2. Average char gasification reactivity values are determined from the TGA results. Kinetic parameters for char carbon gasification reactivity correlations are determined from this data. The Uniform Conversion model is used to account for the change of gasification reaction rate as function of carbon conversion. Some discrepancies, due to complicated ash–carbon interactions, are subjects of further research. In the carbon conversion predictor, laboratory measured reactivity numbers are converted into carbon conversion numbers 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. The residence times for solid fuels in fluidized bed gasifiers are simulated. Simulations against some pilot-scale results show reasonable agreement.

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