Biomass gasification using dual fluidized bed gasification systems: A review

Biomass gasification has been a widely explored research area due to world energy security and environmental concerns. It is also found to be commercially viable process for synthetic gas (syngas) production. Different types of gasifiers based on fluid dynamics, modes of heat transfer to the gasification process, gasification agents, and temperature have been studied. Dual fluidized bed gasifiers are one of the recent technologies which can produce syngas of medium heating value (12–20 MJ/Nm3), thereby proving to be industrially more feasible. This review presents analysis of different designs and configurations of dual fluidized bed gasifiers. The impact of different operating conditions, the effect of tar formation, tar abatement techniques and different modeling approaches have been critically evaluated. The present review gives a holistic view on the current research and developments of dual fluidized bed gasification systems for syngas production.