| Title |
Impact of Porous Silica Nanosphere Architectures on the Catalytic Performance of Supported Sulphonic Acid Sites for Fructose Dehydration to 5-Hydroxymethylfurfural |
| ID_Doc |
9988 |
| Authors |
Price, CAH; Torres-Lopez, A; Evans, R; Hondow, NS; Isaacs, MA; Jamal, AS; Parlett, CMA |
| Title |
Impact of Porous Silica Nanosphere Architectures on the Catalytic Performance of Supported Sulphonic Acid Sites for Fructose Dehydration to 5-Hydroxymethylfurfural |
| Year |
2023 |
| Published |
|
| Abstract |
5-hydroxymethylfurfural represents a key chemical in the drive towards a sustainable circular economy within the chemical industry. The final step in 5-hydroxymethylfurfural production is the acid catalysed dehydration of fructose, for which supported organoacids are excellent potential catalyst candidates. Here we report a range of solid acid catalysis based on sulphonic acid grafted onto different porous silica nanosphere architectures, as confirmed by TEM, N2 porosimetry, XPS and ATR-IR. All four catalysts display enhanced active site normalised activity and productivity, relative to alternative silica supported equivalent systems in the literature, with in-pore diffusion of both substrate and product key to both performance and humin formation pathway. An increase in-pore diffusion coefficient of 5-hydroxymethylfurfural within wormlike and stellate structures results in optimal productivity. In contrast, poor diffusion within a raspberry-like morphology decreases rates of 5-hydroxymethylfurfural production and increases its consumption within humin formation. Sulphonic acid (RSO3H) functionalized porous silica nanospheres show high catalytic activity towards selective dehydration of fructose to 5-hydroxymethylfurfural with pore architecture dictating performance and susceptibility to deactivation via humin by-product formation. Catalyst performance is governed by in-pore diffusion of substrate and product, which are assessed by diffusion NMR.+image |
| PDF |
https://doi.org/10.1002/cplu.202300413
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