Journal of Fundamentals of Renewable Energy and Applications
Open Access
ISSN: 2090-4541
+44 1300 500008
ISSN: 2090-4541
+44 1300 500008
Bijan Hejazi, John R Grace, Xiaotao Bi and Andres Mahecha-Botero
University of British Columbia, Canada
Noram Engineering & Constructors Ltd., Canada
Posters & Accepted Abstracts: J Fundam Renewable Energy Appl
By incorporating reaction kinetics and reactor hydrodynamics, a steady-state two-phase one-dimensional kinetic model for biomass steam gasification in the bubbling fluidized bed gasifier of a dual fluidized bed reactor is developed. The generic two-step kinetic model adopted for biomass pyrolysis allows for predicting tar generation and cracking, as well as predicting pyrolysis products yield and composition based on CHO elemental balances. This model is capable of predicting species concentrations, solids hold-up, temperature, pressure and superficial gas velocity profiles along the gasifier. By performing mass and energy balances over the two interconnected fluidized beds, key operating parameters such as solids circulation rate and additional fuel required for stable operation of the process are approximated. This predictive kinetic model provides an essential tool for designing, evaluating and improving a dual fluidized bed gasifier. The dual fluidized bed gasifier model predictions are compared with experimental measurements from the UBC dual fluidized bed unit.
Email: Bijanhejazi@gmail.com