Improving the Modeling of the Kinetics of the Catalytic Tar Elimination in Biomass Gasification

A single one-lump first-order reaction for the catalytic elimination of tar present in the flue gas from biomass-fluidized bed gasifiers is not good enough for some applications. A new and more advanced reacting network and microkinetic model has been generated and is here presented. It is based on...

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Bibliographic Details
Published in:Industrial & engineering chemistry research 2002-07, Vol.41 (14), p.3351-3356
Main Authors: Corella, José, Toledo, José M, Aznar, Maria-Pilar
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Exact sciences and technology
Fuel processing. Carbochemistry and petrochemistry
Fuels
Solid fuel processing (coal, coke, brown coal, peat, wood, etc.)
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Summary:A single one-lump first-order reaction for the catalytic elimination of tar present in the flue gas from biomass-fluidized bed gasifiers is not good enough for some applications. A new and more advanced reacting network and microkinetic model has been generated and is here presented. It is based on two lumps, the more and the less reactive tar species, and has four kinetic constants. Each lump reacts (disappears) by both catalytic and thermal reactions. The microkinetic model is applied to results obtained at around 840 °C and at small pilot plant level with two very different solids:  silica sand and a commercial (ICI 46-1) nickel-based steam-reforming catalyst. The values found for the four kinetic constants are self-consistent, fit well the results, and mean a clear step forward in the modeling of the catalytic tar abatement.
ISSN:0888-5885
1520-5045
DOI:10.1021/ie0110336