The conversion of waste lignocellulosic biomass into biomass platform chemicals is very promising. In this work, a novel resin-based solid acid catalyst was obtained by condensation of furfuryl alcohol with furfural, and mild calcination and sulfonation process. Then it was used to convert sugars and biomass to obtain furan compounds. Results showed that the solid acid with a furfural to furfuryl alcohol molar ratio of 3:1 is an irregular mesoporous material, with a specific surface area of 134.18 m/g and an acid content of 2.723 mmol/g, which is extremely stable below 200 °C. 82.2 % (from fructose), 15.8 % (from glucose), 10.0 % (from cellobiose) yields of 5-HMF and 35.5 % (from xylose) yield of furfural could be obtained at 160 °C for 2 h. It can be reused more than 5 times and can restore the best catalytic effect after re-sulfonation. Notably, in the catalytic conversion of rice husk, rice straw, camphor tree branch and leaves under typical reaction conditions, 5-HMF and furfural was in yields of 9.4–24.5 % and 20.3–47.9 %, respectively. Moreover, a 10 % water dropwise to solvent can effectively promote the catalytic conversion of biomass, while there is a significant inhibitory effect after it exceeds 20 %.

中文翻译：

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醇甲醛树脂固体酸催化生物质转化为呋喃类化合物


将废弃木质纤维素生物质转化为生物质平台化学品是非常有前途的。本工作通过糠醇与糠醛缩合、温和煅烧和磺化过程，得到了一种新型树脂基固体酸催化剂。然后将其用于转化糖和生物质以获得呋喃化合物。结果表明，糠醛与糠醇摩尔比为3:1的固体酸为不规则介孔材料，比表面积为134.18 m/g，酸含量为2.723 mmol/g，在200℃以下极其稳定。 °C。在 160 °C 下 2 小时，可以得到 82.2%（来自果糖）、15.8%（来自葡萄糖）、10.0%（来自纤维二糖）的 5-HMF 产率和 35.5%（来自木糖）的糠醛产率。可重复使用5次以上，重新磺化后可恢复最佳催化效果。值得注意的是，在典型反应条件下稻壳、稻草、樟树枝叶的催化转化中，5-HMF和糠醛的产率分别为9.4-24.5%和20.3-47.9%。而且，向溶剂中滴加10%的水可以有效促进生物质的催化转化，而超过20%后则有明显的抑制作用。