Abstract
A circulating utilization way of herb residues is designed to convert herb residues to gas fuel in industrial-scale by a circulating gasification bed gasifier in this work. The gasification characteristics of herb residues in the circulating fluidized bed of 300kg/h were investigated in about 200 hours. The results indicated that the gas composition and tar yield were affected by oxygen to biomass ratio (O/B ratio). The lower heating value of product gas was 4 to 5MJ/m3 using herb residues as feedstock. When O/B was 0.37, the product gas reached a good condition with lower heating value of 4.89MJ/m3.
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