高温高圧水中部分酸化によるグルコースからの水素製造技術(第2報) : 反応機構およびギ酸の分解速度(<特集>バイオマス)

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By partial oxidation of glucose with ZnO in high pressure high temperature water at 300℃, glucose was converted into H_2 with relatively high yield and without CH_4 formation. In order to understand the reaction mechanism and the optimum condition of the process, we performed glucose partial oxidation at 200-300℃ to analyse an intermediate of H_2, without ZnO, which probably promotes the intermediate into H_2. As a result, we detected a high yield of HCOOH. The formation of HCOOH was sensitive to reaction temperature and the yield was the highest at 200℃ among the experimental conditions. It was confirmed that the role of ZnO was a promoter of HCOOH decomposition into H_2 and CO_2 through HCOOH conversion experiments with and without ZnO at 200-300℃. The conversion of HCOOH with ZnO was within a few minutes at 300℃. Through the study, we suggested that two-stage reaction is effective for H_2 formation from glucose partial oxidation: the partial oxidation of glucose is conducted at 200℃ and the conversion of HCOOH is achieved over 300℃. To confirm the idea, the two-stage reaction was performed: the partial oxidation of glucose was conducted at 200℃ with ZnO followed to increase temperature up to 300℃ for promotion of H_2 formation. The H_2 yield was less amount than expected. This was probably due that ZnO prohibited the formation of HCOOH on glucose partial oxidation at 200℃.
一般社団法人日本エネルギー学会の論文
2008-09-20

高温高圧水中部分酸化によるグルコースからの水素製造技術(第2報) : 反応機構およびギ酸の分解速度(<特集>バイオマス)

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