多层碳基固体酸催化合成生物基5-羟甲基糠醛的研究
汤静洁 , 彭其达 , 张平军 , 黄冬婷 , 秦健南 , 李明富
现代化工 ›› 2025, Vol. 45 ›› Issue (1) : 143 -148.
多层碳基固体酸催化合成生物基5-羟甲基糠醛的研究
Synthesis of biobased 5-hydroxymethylfurfural over multilayer carbon-based solid acid
为改善碳基固体酸制备工艺并扩大其在生物基化学品合成领域的应用,利用L-抗坏血酸与对甲苯磺酸(TsOH)直接研磨共混并结合低温碳化制备了多层碳基固体酸催化剂,探究了催化剂制备条件及催化反应条件对果糖转化率和5-羟甲基糠醛(HMF)产率的影响。利用SEM、TG和FT-IR对催化剂进行表征与分析。结果表明,随着酸用量的增加,碳基固体酸形貌由多层片状变为块状,且其内部含有大量多孔结构;催化剂的热分解温度随着酸用量的增加而升高;碳基固体酸表面含有磺酸基、羧基和羟基。碳基固体酸催化果糖合成HMF最佳条件为: TsOH质量为1.5 g、催化剂质量为50 mg、果糖质量为90 mg、反应温度为120℃、反应时间为60 min,此时果糖转化率达到100%,HMF产率为98.5%。
In order to improve the preparation process of carbon-based solid acids and expand their application in the synthesis of bio-based chemicals,a multilayer carbon-based solid acid catalyst is prepared through direct milling and blending of L-ascorbic acid and p-toluenesulfonic acid (TsOH) combined with low-temperature carbonization.Influences of catalyst preparation conditions and catalytic reaction conditions on the conversion of fructose and the yield of 5-hydroxymethylfurfural (HMF) are explored.The catalyst is characterized by means of SEM,TG and FTIR.It is indicated that the morphology of carbon-based solid acid changes from multilayer sheet to block with the increase of acid dosage,and there exist a lot of porous structure within carbon-based solid acid.The catalyst’s thermal decomposition temperature increases with the increase of acid dosage.The surface of carbon-based solid acid contains sulfonic group,carboxyl group and hydroxyl group.The optimum conditions for the synthesis of HMF from fructose over carbon-based solid acid are obtained as follows:the dosages of TsOH,catalyst and fructose are 1.5 g,50 mg,and 90 mg,respectively,reaction temperature is 120℃,and reaction time is 60 min.Under these conditions,the conversion rate of fructose and the yield of HMF are 100% and 98.5%,respectively.
生物基平台化学品 / 多相催化 / 5-羟甲基糠醛 / 果糖 / 碳基固体酸
bio-based platform chemicals / heterogeneous catalysis / 5-hydroxymethylfurfural / fructose / carbon-based solid acids
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广东省科学院发展专项资金项目(2023GDASZH-2023010102)
广州市科技计划项目(2023A04J1844)
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