| Abstract |
A comprehensive process model is developed for high temperature air – steam biomass
gasification in a downdraft gasifier using the ASPEN PLUS simulator. The simulation results are
compared with the experimental data obtained through pilot scale downdraft gasifier. In this study,
the model is used to investigate the effects of gasifying agent preheating, equivalence ratio (ER),
and steam/biomass (S/B) on producer gas composition, high heating value (HHV), and cold gas
efficiency (CGE). Results indicate that H
2
and CO contents have increased when gasifying agent
preheating is used, while gasifying agent preheating has no effect with H
2
and CO at high ER.
At high level of S/B, the concentrations of H2
and CO are related with water-gas shift reaction in
significant. HHV and CGE depend on the concentrations of H
2
and CO in producer gas, which can
increase by preheated gasifying agent. However, gasifying agent preheating should apply with
waste heat from the process because there is no additional cost of energy price. |
Publication
Journal Publication
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