Selective production of 5-hydroxymethylfurfural from fructose in the presence of an acid-functionalized SBA-15 catalyst modified with a sulfoxide polymer
Selective production of 5-hydroxymethylfurfural from fructose in the presence of an acid-functionalized SBA-15 catalyst modified with a sulfoxide polymer
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DOI：
10.1039/c9me00093c
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发表时间：
2020-01
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通讯作者：
Mariah R. Whitaker;Aamena Parulkar;N. Brunelli
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文献类型：
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作者：
Mariah R. Whitaker;Aamena Parulkar;N. Brunelli
生物质是一种可再生的碳原料，可以转化为5-羟甲基糠醛（HMF），这是一种有用的平台化学品，可以被改性以生产有价值的化学品和燃料。先前的研究表明，在有机溶剂如二甲基亚砜（DMSO）中，由于其在溶液中稳定HMF的能力，可以实现高的HMF选择性，但DMSO是工业上不希望使用的溶剂，因为产物与反应溶液分离困难。多孔催化剂的表面功能化已被证明是在非均相催化剂表面引入溶剂效应的一种方法，从而避免了对DMSO等高沸点溶剂的需要。将聚乙烯亚砜（PESO）添加到磺酸（SA）功能化SBA-15二氧化硅表面，得到双功能催化剂SA-PESO-SBA-15。在催化剂孔内与磺酸基共定位的亚砜聚合物（SA-PESO-SBA-15）将HMF的选择性从单功能SA-SBA-15在水中27%的果糖转化率下获得的26%提高到51%。此外，该双功能催化剂在1:1 (w/w) THF：水共溶剂（工业上更受欢迎的共溶剂体系）中表现最佳，在87%的果糖转化率下获得79%的HMF选择性。总的来说，这些材料有希望选择性地将果糖转化为HMF。
Biomass is a renewable carbon feedstock that can be converted to 5-hydroxymethylfurfural (HMF), a useful platform chemical that can be modified to produce valuable chemicals and fuels. Previous research has shown that high HMF selectivity can be achieved in organic solvents such as dimethyl sulfoxide (DMSO) because of its capability to stabilize HMF in solution, but DMSO is an undesirable solvent to use industrially as product separation from the reaction solution is difficult. Surface functionalization of porous catalysts has been shown as a method to introduce solvent-effects at the surface of heterogeneous catalysts, thus avoiding the need for high boiling solvents like DMSO. Poly(ethylene sulfoxide) (PESO) is added to the surface of sulfonic acid (SA) functionalized SBA-15 silica to obtain the bifunctional catalyst SA-PESO-SBA-15. Co-localization of the sulfoxide polymer with sulfonic acid groups inside the catalyst pores (SA-PESO-SBA-15) increased HMF selectivity to 51% from 26% obtained by monofunctional SA-SBA-15 at 27% fructose conversion in water. Additionally, this bifunctional catalyst performs best in 4 : 1 (w/w) THF : water cosolvent, a more industrially preferred cosolvent system, obtaining 79% HMF selectivity at 87% fructose conversion. Overall, these materials are promising for the selective conversion of fructose to HMF.