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Development Flow Reactor to Convert Saccharides into Chemical Resources under Hydrothermal Condition

Development Flow Reactor to Convert Saccharides into Chemica...

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第四届中美化学工程会议和第三届中日化工研讨会合并的三边化学工程大会

作者： Takashi Saito Mitsuru Sasaki shintaro noguchi Motonobu Goto Kumamoto University Japan

Saccharides (for example glucose, fructose and xylose) are as recyclable organic resources. Sub-or supercritical water (SCW: Tc=374oC, Pc=22.1MPa) is an interesting medium which is able to convert saccharides into chemical resources without the use of catalysts. From recent works, it was found that valuable organic compounds could be obtained within short reaction time and high yield could be achieved by manipulating reaction temperature and pressure to control reaction rates and equilibria. However in most of reaction systems in most cases required a large amount of water for rapid-heating to prevent advancing of side reactions. Therefore, it was difficult to separate chemical components from product solution because the concentration of the products became dilute. To solve these problems, in this work, degradation experiments of saccharides were carried out using continuous flow-type reactors. The feed solution was 0.1M D-fructose, and degradation was performed in the temperature range of 200-400oC, reaction pressure 20-30MPa, and residence time 1-3s. The identification and quantitative analysis of products were carried by HPLC-UV/RI. From the results of the analysis, it was found that main products were 5-Hydroxyrnethyle-2-frufural(5-HMF),

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