化工新型材料

化工新型材料 ›› 2026, Vol. 54 ›› Issue (6) : 176-182. DOI: 10.19817/j.cnki.issn1006-3536.2026.06.033

科学研究

分子筛催化葡萄糖选择性转化制糠醛研究

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Selective conversion of glucose to furfural catalyzed by molecular sieves

Zhang Ziyu^1,2, Wang Binyi^1,2, Yan Yishuo¹, Yang Zhenghong¹, Zheng Hongyan¹

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Received
2025-07-15
Issue Date	Revised Date
2026-06-18	2025-07-15

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摘要

将ReY、MCM-41和Hβ分子筛用于催化葡萄糖转化制糠醛反应,并借助X射线衍射(XRD)、BET比表面、吡啶红外光谱(Py-IR)和NH₃程序升温脱附(NH₃-TPD)等手段,对分子筛孔道结构及酸性质在催化葡萄糖转化过程中的作用规律进行了研究。结果表明:ReY分子筛酸量较高且以强B酸为主,虽然其L酸量较少,但酸中心足以催化葡萄糖转化,反应生成的主要产物为5-羟甲基糠醛,在160℃下5-羟甲基糠醛的收率达51.6%。MCM-41分子筛酸性最弱且酸量最少,低温反应时葡萄糖转化率较低,产物以5-羟甲基糠醛为主。Hβ分子筛酸性虽比ReY分子筛弱,但也能有效催化葡萄糖转化,主要产物为糠醛,在180℃下反应糠醛收率为36.9%。ReY分子筛含有超笼,使环状果糖可以直接在分子筛孔道内的酸性位上脱水生成5-羟甲基糠醛。介孔MCM-41分子筛的孔径远大于环状果糖分子尺寸,所以转化产物也主要是5-羟甲基糠醛。Hβ分子筛的孔尺寸小于环状果糖分子,糠醛是由链状果糖在其孔道内部断裂C—C键脱水生成。

Abstract

ReY,MCM-41 and Hβ molecular sieves were employed to catalyze the conversion of glucose to furfural.The influence of their pore structures and acidic properties of the molecular sieves on the catalytic performance of glucose was systematically investigated using characterization techniques such as XRD,BET,Py-IR,and NH₃-TPD.The results indicated that ReY molecular sieve possessed a relatively high acid amount dominated by strong Brønsted acid sites.Although Lewis acid amount of the ReY was low,the acid centers remained sufficient to catalyze glucose conversion,with 5-hydroxymethylfurfural being the primary product,achieving a yield of 51.6% at 160℃.MCM-41 molecular sieve exhibited the weakest acidity and lowest acid concentration among the tested catalysts,resulting in relatively low glucose conversion at low reaction temperatures,with 5-hydroxymethylfurfural as the dominant product.Hβ molecular sieve exhibited weaker acidity than ReY molecular sieve,but it remained effective in catalyzing glucose conversion,with furfural being the primary product,achieving a 36.9% yield at 180℃.The ReY molecular sieve contained supercages,allowing cyclic fructose to directly undergo dehydration at the acid sites within the molecular sieve channels to form 5-hydroxymethylfurfural.The mesoporous MCM-41 molecular sieve,with pore sizes larger than the molecular size of cyclic fructose,primarily yielded 5-hydroxymethylfurfural as the conversion product.The pore dimensions of Hβ molecular sieve were smaller than the molecular size of cyclic fructose,and furfural was formed by linear fructose through the cleavage of the C—C bond and dehydration inside its pores.

关键词

生物质 / 分子筛 / 葡萄糖 / 糠醛

Key words

biomass / molecular sieve / glucose / furfural

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分子筛催化葡萄糖选择性转化制糠醛研究[J]. 化工新型材料, 2026, 54(6): 176-182 DOI:10.19817/j.cnki.issn1006-3536.2026.06.033

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