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Article Dans Une Revue Fuel Année : 2006

Influence of the pyrolysis heating rate on the steam gasification rate of large wood char particles

Floriane Mermoud
  • Fonction : Auteur
Laurent van de Steene
Fabrice Golfier

Résumé

Thisworkwascarriedoutinordertoquantifytheimpactofthepyrolysisheatingratebothonthepropertiesoftheresidualcharcoalandonthe behaviourduringgasificationbyH 2 Oofthecharcoal.Theexperimentswereconductedon10mmdiameterbeechwoodspheres,pyrolysedat atmosphericpressureunderheatingratescoveringtherangefromveryslow,2.6Kmin K1 ,toveryrapid,over900Kmin K1 ,i.e.thehighestvalue thatcanbereached.Whencharcoalissubmittedtogasificationat20%H 2 O i nN 2 at1200K,theratioofthetimesforcompleteconversionreach 2.6.Suchadifferenceisconsiderableasfarasanindustrialapplicationisconcerned.Theinitialpropertiesofthecharcoalsuchasapparentdensity, porosity,andporesurfaceareaobtainedbyN 2 orAradsorptionweremeasuredinordertoexplainthedifferencesingasificationkineticswithinthe charcoal.Thecharcoalparticlesexhibitdensitiesasdifferentas219-511kgm K3 andporositiesbetween87and70%forcharcoalpreparedat900 and2.6Kmin K1 respectively.Thespecificsurfaceareaishigherthan600m 2 g K1 forthreecharcoals.Influenceofashcontentoftheinitial charcoals,at1.6-2.7%,isalsoregardedwithparticularattentiontoexplaintheobserveddifferencesingasificationkinetics.
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Dates et versions

hal-01846926 , version 1 (06-11-2018)

Identifiants

Citer

Floriane Mermoud, Sylvain Salvador, Laurent van de Steene, Fabrice Golfier. Influence of the pyrolysis heating rate on the steam gasification rate of large wood char particles. Fuel, 2006, 85 (n° 10-11), p.1473-1482. ⟨10.1016/j.fuel.2005.12.004⟩. ⟨hal-01846926⟩
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