| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Research Abstract |
The pyrolysis rate of biomass is much higher than the gasification rate of char, the overall conversion rate of biomass is controlled by the gasification rate of char (that is, carbides formed after pyrolysis) in the reduction zone. That is, the overall gasification rate is limited by the slow gasification-rate of char in the endothermic reaction zone. Hence, we attempted to improve the gasification reactivity by using an alkali metal catalyst at low temperatures. The main results are summarized. (1) When potassium is directly supported on char, the gasification rate of wood biomass (Douglas-fir char) increases by approximately 4-5 times even at a small support ratio (2.1 wt%). (2) The gasification rate can be significantly improved even at low temperatures by using a method in which potassium is directly supported on char. The catalytic effect of potassium is observed for not only wood biomass but also grass biomass.
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