数字农科院2.0

Microwave irradiation-assisted isomerization of glucose to fructose over Mg/Al-doped lignin self-assembled nanospheres

文献类型： 外文期刊

作者： Jianrong Shan;Bowen Yang;Yaqiong Su;Gunhean Chong;Luqman Chuah Abdullah;Xinhua Qi;Haixin Guo

作者机构：

关键词： Glucose Isomerization;Lignin nanospheres;Microwave;Self-assembly;Solid acid-base catalysis

期刊名称： Applied Catalysis B: Environmental

ISSN： 0926-3373

年卷期： 2025 年 379 卷

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Isomerization of glucose to fructose is a key step in achieving high value conversion of biomass. Lignin nanosphere (LN) showing hollow structure were successfully prepared using lignin oligomers as carbon precursors and self-assembly method. On this basis, Mg and Al were doped into lignin nanospheres by electrostatic and coordination interactions to obtain a heterogeneous catalyst (MgxAly/LN) with the coexistence of Brønsted base and Lewis acid. In this catalytic system, the synergistic effect of Al(OH)3 and MgO as the active center of the catalyst promoted the formation of intermediates for the isomerization of glucose to fructose. DFT analysis show that Al(OH)3 plays a greater role than MgO in promoting the isomerization of acyclic glucose to form fructose. When the Mg/Al ratio of 2:1, the yield of Mg2Al1/LN catalyzed isomerization of glucose to fructose under microwave irradiation can reach as high as 57.2 %, which could be reused for 5 times and still remain its initial activity. The activation energy was about 39.8 kJ/mol, which was lower than that of most heterogenous catalytic systems, showing good catalytic performance and potential for application.

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