Biotechnology Research Institute, National Research Council Canada, 6100 Royalmount Avenue, Montreal, QC H4P 2R2, Canada.
ChemSusChem. 2011 Apr 18;4(4):535-41. doi: 10.1002/cssc.201100023. Epub 2011 Mar 17.
Nafion 117 has been proven as a robust and reusable heterogeneous catalyst for the dehydration of 9.1 % (w/w) xylose in dimethyl sulfoxide (DMSO) to yield 60 % furfural in 2 h at 150 °C. The catalytic high activity promoted shorter reaction times to limit the formation of side-products which otherwise would lead to decreased yields. Within the allowable operating temperature range of Nafion (125 to 175 °C), the reaction was kinetically controlled. In corroboration with AFM and SEM imaging, ATR-FTIR confirmed that the Nafion catalytic activity remained unchanged after 15 repeated uses. With excellent chemical and thermal stability under the conditions for xylose dehydration compared to existing solid acid catalysts, this reusable Nafion system could be a step towards the more economical production of furfural from renewable biomass, an intermediate chemical for the preparation of value-added chemicals.
Nafion 117 已被证明是一种稳健且可重复使用的多相催化剂，可用于将 9.1%（质量分数）的木糖在二甲基亚砜（DMSO）中脱水，在 150°C 下 2 小时即可生成 60%的糠醛。这种催化的高活性促进了反应时间的缩短，从而限制了副产物的形成，否则副产物的形成会导致产率降低。在 Nafion（125 至 175°C）的允许工作温度范围内，反应受动力学控制。与 AFM 和 SEM 成像一致，ATR-FTIR 证实 Nafion 的催化活性在 15 次重复使用后保持不变。与现有的固体酸催化剂相比，该 Nafion 体系在木糖脱水条件下具有出色的化学和热稳定性，这可能是朝着从可再生生物质生产糠醛（一种用于制备高附加值化学品的中间体化学品）的更经济生产迈出的一步。
