The Key Role of Textural Properties of Aluminosilicates in the Acid‐Catalysed Dehydration of Glucose into 5‐Hydroxymethylfurfural

Three protonated zeolites (H‐ZSM‐5, H‐Y and H‐Beta) were prepared and tested in the catalytic dehydration of glucose into 5‐hydroxymethylfurfural (HMF). The catalytic results are compared with those obtained with a mesoporous MCM‐41‐type aluminosilicate, in order to assess the influence of textural...

Full description

Saved in:
Bibliographic Details
Published in:ChemistrySelect (Weinheim) 2017-03, Vol.2 (8), p.2444-2451
Main Authors: Moreno‐Recio, Mercedes, Jiménez‐Morales, Ignacio, Arias, Pedro L., Santamaría‐González, José, Maireles‐Torres, Pedro
Format: Article
Language:English
Subjects:
acidity
biomass
green chemistry
heterogeneous catalysis
mesoporous materials
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Three protonated zeolites (H‐ZSM‐5, H‐Y and H‐Beta) were prepared and tested in the catalytic dehydration of glucose into 5‐hydroxymethylfurfural (HMF). The catalytic results are compared with those obtained with a mesoporous MCM‐41‐type aluminosilicate, in order to assess the influence of textural and acid properties on the catalytic performance. The dehydration process was carried out in a biphasic water/methyl‐isobutyl ketone (MIBK) system, and the positive effect of NaCl addition (20 wt. %) on both HMF selectivity and yield was observed. Using the H‐Beta zeolite in a NaCl aqueous solution/MIBK, at 195 °C, the best catalytic results were obtained, with a HMF yield of 56%, close to that obtained with 10Al‐MCM‐41 (63%), after only 30 min of reaction time; whereas HMF yields rose only up to 42% using H‐ZSM‐5 and H‐Y. This fact demonstrates the positive effect of mesoporosity to favour the dehydration of glucose to HMF. The reutilisation of these catalysts was also examined. The evaluation of the catalytic behaviour in the dehydration of glucose, at 195°C in a biphasic NaClaq/MIBK system, of different porous aluminosilicates has demonstrated the positive effect of mesoporosity. In this sense, a maximum HMF yield of 55.8% has been attained, after only 30 min, in the presence of a H‐beta zeolite, which among the studied catalysts, is that which exhibits a suitable combination of acid properties and meso‐microporosity.
ISSN:2365-6549
2365-6549
DOI:10.1002/slct.201700097