Abstract
A novel fluidized-bed gasifier was designed in which rice husk was fluidized and gasified without inert additives. The gas compositions of CO, CO2, H2, CH4, and O2 were determined by an online analyzer and gas chromatography. The results showed that low fluidized velocity and low gasification temperature (550−650 °C) were beneficial to the production of syngas with a high composition of CO. The composition of H2 was influenced slightly by the equivalent ratio. The average composition of H2 was almost unchangeable to different fluidized velocities. The minimal fluidized velocity vmf of rice husk without inert additives experimentally determined was 0.495 m/s, which was higher than that of the two-component system containing rice husk and sand (vmf < 0.3 m/s). The throughput of rice husk in this reactor was higher than that in a fixed bed with the same volume. This fluidized-bed reactor had a longer service term than a traditional fluidized bed for a two-component system.
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