Catalysis of Glucose to 5-Hydroxymethylfurfural using Sn-Beta Zeolites and a Brønsted Acid in Biphasic Systems
Catalysis of Glucose to 5-Hydroxymethylfurfural using Sn-Beta Zeolites and a Brønsted Acid in Biphasic Systems
复制标题
在双相系统中使用 Sn-Beta 沸石和布朗斯台德酸催化葡萄糖生成 5-羟甲基糠醛
DOI：
10.15376/biores.10.3.5863-5875
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发表时间：
2015-07
期刊：
影响因子：
1.5
通讯作者：
Jiachuan Chen
中科院分区：
文献类型：
--
作者：
Guihua Yang;Chao Wang;Gaojin Lyu;Lucian A Lucia;Jiachuan Chen
葡萄糖选择性高效脱水制备5-羟甲基糠醛（HMF）是近年来研究的热点，特别是从环境友好型多相催化剂的角度出发。然而，关于Sn-β沸石的应用的数据相对较少，Sn-β沸石是一类非常无害、廉价和有效的催化剂，用于评估生物基转化。研究表明，Sn-Beta具有良好的刘易斯酸性，可以在低pH值的水性介质中催化葡萄糖异构化为果糖，并在双相体系中加速葡萄糖脱水为HMF，产率高。以NH 4F为矿化剂的Sn-Beta沸石（Sn-Beta-F）是葡萄糖选择性脱水制HMF的更有效催化剂。在酸性环境（pH 1）中，在190 °C下70 min后，在Sn-β-F沸石上获得53.0%的最佳HMF产率。该反应体系对纤维素转化为羟甲基糠醛也是有效的，初步产率为32.2%。
Selective and efficient dehydration of glucose to 5-hydroxymethylfurfural (HMF) has been a widely explored concept recently, especially from the perspective of employing environmentally benign heterogeneous catalysts. However, there has been a relative paucity of data regarding the application of Sn-Beta zeolites, a category of catalysts that are very innocuous, inexpensive, and effective, toward evaluating bio-based conversions. Sn-Beta was shown to possess good Lewis acidity for catalyzing glucose isomerization to fructose in aqueous media at low pH and accelerating dehydration of glucose to HMF in a biphasic system with high yields. Sn-Beta zeolite with NH4F as the mineralizing agent (Sn-Beta-F) was a more effective catalyst for the selective dehydration of glucose to HMF. An optimal HMF yield of 53.0% was obtained over Sn-Beta-F zeolite in an acidic environment (pH 1) after 70 min at 190 °C. The reaction system was also effective for conversion of cellulose to HMF with a yield of 32.2% preliminarily.
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