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.

中文翻译：

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在用亚砜聚合物改性的酸官能化SBA-15催化剂存在下，从果糖中选择性生产5-羟甲基糠醛

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），一种有用的平台化学品，可以对其进行改性以生产有价值的化学品和燃料。先前的研究表明，由于在有机溶剂（例如二甲基亚砜）中具有稳定HMF的能力，因此可以在有机溶剂（例如二甲基亚砜）中实现高HMF选择性，但由于难以从反应溶液中分离出产物，因此DMSO在工业上不受欢迎。多孔催化剂的表面官能化已显示为在非均相催化剂表面引入溶剂效应的方法，从而避免了对高沸点溶剂（如DMSO）的需求。将聚（亚乙基亚砜）（PESO）添加到磺酸（SA）官能化的SBA-15二氧化硅的表面上以获得双功能催化剂SA-PESO-SBA-15。亚砜聚合物与磺酸基在催化剂孔内的共定位（SA-PESO-SBA-15）使HMF选择性从单官能SA-SBA-15在水中果糖转化率为27％时获得的26％提高到51％。另外，这种双功能催化剂在4：1（w / w）THF：水助溶剂（一种工业上更优选的助溶剂系统）中表现最佳，在果糖转化率为87％时获得79％的HMF选择性。总体而言，这些材料有望将果糖选择性转化为HMF。工业上更优选的助溶剂体系，果糖转化率为87％时，其HMF选择性为79％。总体而言，这些材料有望将果糖选择性转化为HMF。工业上更优选的助溶剂体系，果糖转化率为87％时，其HMF选择性为79％。总体而言，这些材料有望将果糖选择性转化为HMF。