Tomoaki HIROSE
Effect of Reaction Condition on Fuel Gas Production in the Gasification and Reforming of Sewage Sludge
Toshiya KOMATSU, Syuji HIMENO
Recently, sewage sludge gasification and reforming system draw attention as the new energy. In this study, we quantitatively examine the effect of pyrolysis temperature and gasifying agent (O2,steam) supply on products by experiment of a lab scale.
When changing pyrolysis temperature, gas yield and recovered heat quantity increased with an increase in temperature. When changing steam supply, the yield of H2 and CO2 increased by a water gas reaction with an increase in the supply. And recovered heat quantity also increased. However, when it supplies more than H2O/C=0.72, recovered heat quantity decreased. When changing O2 supply, the yield of CO and CO2 increased by a partial oxidation with an increase in the supply. And recovered heat quantity also increased. However, when it supplies more than O2 ratio=0.3, recovered heat quantity decreased because complete oxidation becomes active.
Additionally, the composition after reforming pyrolysis gas obtained in the experiment was predicted by equilibrium calculation. The difference of heat quantity recovered as pyrolysis gas by the difference in condition stay about the same, even after reforming. Therefore, it was found that improvement in recovered heat quantity in pyrolysis furnace is necessary to an improvement in recovered heat quantity in this system.
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