Synthesis of Sulfated Sn–Zr Mesoporous Catalysts for the Selective Dehydration of Hexose‐Type Monosaccharides
Eliana Diguilio, Horacio Falcón, Marcelo E. Domine, María Laura Martínez
TL;DR
Scientists created a new catalyst that efficiently converts fructose into HMF, a key chemical for biofuels and materials.
Contribution
A sulfated Sn–Zr mesoporous catalyst is developed with optimized Brønsted and Lewis acid sites for high HMF yield from fructose.
Findings
SO4/Sn–Zr–SBA-15 achieves ≥70% HMF yield with ≈90% fructose conversion under optimal conditions.
The catalyst's acid site balance and sulfate groups enhance its performance compared to other materials.
Higher fructose concentrations were used successfully compared to prior studies.
Abstract
Synthesis of combined Brønsted and Lewis acid sites in SBA‐15 by Zr and Sn incorporation onto the mesoporous support, followed by a sulfation procedure to get enhanced acid catalysts for fructose‐to‐5‐hydroxymethylfurfural (HMF) selective dehydration, is here studied. Different preparation methods are used to attain the Sulfated Sn–Zr–SBA‐15 material with adequate combination of Brönsted and Lewis acidity. Samples are characterized by using different analytical and spectroscopic techniques, results indicating a correlation between the preparation procedure and the acid characteristics of the materials. The latter are evaluated in the catalytic conversion of concentrated fructose solutions (30 wt%) into HMF in a biphasic system (water + iso‐butylketone/2‐butanol). The most efficient catalyst, SO4/Sn–Zr–SBA‐15 (Zr/Sn molar ratio = 1.98), yields ≥ 70% HMF at a substrate conversion of ≈90%…
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Taxonomy
TopicsCatalysis for Biomass Conversion · Mesoporous Materials and Catalysis · Catalysis and Hydrodesulfurization Studies