抄録
The present study discusses the heat and reaction characteristics of the multistage alcoholic-fuel reformer. Gas temperatures, exhaust gas components and radical chemiluminescence intensities were monitored in the reformer. In the single-stage case, temperature level inside the reactor and decomposition ratio of CH_3OH, a, were decreased with an increase in equivalence ratio, φ (≥3.0). In contrast, higher φ resulted in lower OH-radical chemiluminescence intensity inside the reactor. In the double-stage case that a portion of the air was supplied to the secondary port, a slight increase in the H_2 concentration was observed, and an excessive increase of local temperature was avoided. These results show the double-stage air supply is effective to control the temperature distribution and avoid an undesired hot-spot in the reformer without causing a significant change in the components of the product gas.
