Producer Gas Cleaning in a Dual Fluidized Bed Reformer using Two Catalysts

摘要: The most elegant method to remove tars out of producer gas from biomass gasification is catalytic hot cleaning. However, catalysts are poisoned after short operation due carbon formation or by other contaminants on their active sites. A novel technique for cleaning based two interconnected fluidized beds has been investigated. idea reform the tar components into useful molecules means a circulating catalyst, also called oxygen carrier in following. cleaned one reactors, referred as fuel reactor (FR), while it continuously regenerated air (AR). reactors separated loop seals such way that leakage prevented between solid circulation occurs. By varying rate material system, residence time raw stream and frequency regeneration can be adjusted. Meanwhile, required amount partial oxidation transferred. system described here coupled with its FR Chalmers 2-4 MWth gasifier AR fed nitrogen-diluted air. In preliminary tests, effect different both content composition was Some tested materials do not only tars, they influence H2/CO-ratio beneficial manner. this paper, comparative results testing manganese iron presented. Results suggest show satisfying ability deposits. Higher temperature enhances removal during experiment catalysts. Moreover, iron-based catalyst water shift activity, which turns impacts total produced gas. On hand, manganese-based seems express higher propensity conversion. These observations elicit an interesting flexibility process judicious set coordination pertinent operating conditions chosen achieve desired purposes.