No.55 木質の水蒸気ガス化に及ぼすカルシウムおよび鉄触媒の効果(ガス化)

概要

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The influence of the iron and calcium catalysts on the gas evolution behavior in the steam gasification up to 900°C of the Japanese cedar(Sugi)was examined in this study. Hydrogen began to evolve from about 700°C, and the maximum rate of hydrogen evolution was reached at 900°C for the Sugi without catalyst. By the addition of iron catalyst, the hydrogen evolution peak shifted to the lower temperature and the amount of hydrogen evolution increased. In the temperature range between 600 and 900°C, the hydrogen evolution profiles were similar to the CO_2 evolution profiles. The comparison between the results of steam gasification and pyrolysis suggests that the iron catalysts enhance the fixation of carbon into the char during pyrolysis and the conversion of the fixed carbon into CO_2 to form hydrogen during steam gasification. It was also shown that the calcium catalysts had the effect of the promotion of hydrogen evolution at the lower temperature.
2010-09-21