| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Outline of Final Research Achievements |
When the reaction involving gas volume reduction is performed in a fluidized catalyst bed, serious defluidization occurs. The reason is that the gas velocity in the emulsion phase becomes lower than the minimum fluidization velocity. The conditions that will cause defluidization (the defluidization region) could be detected by the on-line analysis of the average value, the standard deviation, the dominant frequency and the periodicity of fluctuations. In this study, hydrogenation of carbon dioxide was performed in a fluidized catalyst bed and the operation parameters were controlled to maintain good fluidization. When the values of indexes exceeded threshold values, the reaction conditions were changed to move from the defluidization region by decreasing the reaction temperature or stop the carbon dioxide supply. By controlling the reaction conditions, the frequency of occurrence of defluidization could be suppressed and the intensity of the defluidization could be reduced.
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