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Highly efficient conversion of glucose to methyl lactate over hierarchical bimetal‐doped Beta zeolite catalysts
Author(s) -
Yue XiaoYang,
Ren HuiFang,
Wu Chengming,
Xu Jun,
Li Jifan,
Liu ChunLing,
Dong WenSheng
Publication year - 2021
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.6748
Subject(s) - bimetal , catalysis , yield (engineering) , chemistry , zeolite , beta (programming language) , fructose , nuclear chemistry , inorganic chemistry , medicinal chemistry , organic chemistry , materials science , metallurgy , computer science , programming language
BACKGROUND Methyl lactate is widely applied in the chemical, food, cosmetics and pharmaceutical industries. The conversion of carbohydrates over heterogeneous catalysts to methyl lactate is a promising environmentally benign process. RESULTS Hierarchical Sn‐Beta zeolite (Sn‐Beta) and corresponding bimetal‐doped Beta zeolites (M‐Sn‐Beta; M = Zn, In, La, Ga, Ni) were prepared via a novel modified hydrothermal synthesis method to convert carbohydrates into methyl lactate. The introduction of Zn into Sn‐Beta considerably improved the yield of methyl lactate from glucose, while for the catalysts containing In, La, Ga and Ni, such improvements were not observed. CONCLUSIONS A methyl lactate yield reaching up to 66.7% was obtained over Zn‐Sn‐Beta at 220 °C for 6 h. The enhanced catalytic performance was attributed to high Lewis acid density and strength, together with synergistic effects between framework Sn 4+ and Zn 2+ ions of Zn‐Sn‐Beta. Additionally, Zn‐Sn‐Beta demonstrated fructose and sucrose conversion into methyl lactate with yields of 68.4% and 70.0%, respectively. The Zn‐Sn‐Beta catalyst could be re‐used at least five times with only a slight loss of methyl lactate yield. © 2021 Society of Chemical Industry (SCI).