Title:
Modelling of a Dual Fluidized Bed Biomass Gasifier: What Kinetic Constants from Literature are the Most Suitable?
Author(s):
Authier, O., Ferrer, M., Mauviel, G., Khalfi, A.E., Lédé, J.
Document(s):
Paper
Abstract:
The aim of the present paper is to discuss the validity of kinetic constants published in the literature for modeling of a Dual Fluidized Bed (DFB) biomass gasifier. The following chemical processes occurring during biomass conversion are critically examined: drying (described as a chemical reaction using an Arrhenius-type law), primary pyrolysis of biomass (described by a simplified three competitive reactions scheme), steam char gasification, secondary homogeneous and catalytic cracking reactions of primary vapors (described by a one reaction scheme) and catalytic gas reactions (water-gas shift and steam methane reforming). For that purpose, kinetic data are compared on the basis of reaction characteristic times defined as a function of reaction reference temperature. It is pointed out that there is no consensus about the kinetic constants to be used in modeling for each of these chemical reactions despite the numerous works reported in the literature. For accurate modeling of gasifier, the kinetic constants have to be chosen with caution because they can be apparent and only applied for the conditions of the experiments.
Keywords:
dual fluidized bed, model, kinetic constants
Topic:
Thermochemical conversion - Gasification for synthesis gas production
Subtopic:
Gasification for synthesis gas production
Event:
18th European Biomass Conference and Exhibition
Session:
VP2.2.2
Pages:
823 - 828
ISBN-13:
978-88-89407-56-1
ISBN-10:
88-89407-56-5
Paper DOI:
10.5071/18thEUBCE2010-VP2.2.2
Price:
FREE
