ENERGY RECOVERY BY GASIFICATION OF AGRICULTURAL AND FORESTRY WASTES IN FLUIDIZED BED REACTORS AND MOVING BED REACTORS WITH INTERNAL RECYCLE OF PYROLYSIS GAS. PROCESS DEVELOPMENT AND REACTOR MODELLING
A modified co-current moving gasifier bed has been developed which substantially reduces product gas tar content compared to conventional down draft gasifiers and allows for a better scale-up of the reactor. These improvements have been realized by installing an ejector in the air inlet which sucks the pyrolysis gases into the gasifying air stream and allows for subsequent combustion of the pyrolysis products in a separate combustor. Results have been PUBLISHED ELSEWHERE. In relation to the modelling of a fluidized bed biomass gasifier, we studied the fast pyrolysis of beech wood particles and the char - carbondioxide gasification kinetics in a bench scale fluidized bed reactor. A 30 cm diameter fluidized bed biomass gasifier has been studied. Those experiments (at 50 kg biomass/hr) revealed that a good gas quality is produced if the reactor is operated above 800 degrees C, in the co-current mode (bottom feed). Ongoing research is on mass transfer and flow behaviour in the fluidized bed reactor; a mathematical model of the fluidized bed gasifer is under development.
Bibliographic Reference: EUR 10012 (1986) MF, 327 P., BFR 600, BLOW-UP COPY BFR 1635, EUROFFICE, LUXEMBOURG, POB 1003
Availability: Can be ordered online
Record Number: 1989124080900 / Last updated on: 1987-01-01
Available languages: en