Ciemięga Agnieszka, Maresz Katarzyna, Janoszka Katarzyna, Mrowiec-Białoń Julita
Institute of Chemical Engineering of the Polish Academy of Sciences, Bałtycka 5, 44-100 Gliwice, Poland.
Institute of Environmental Engineering of the Polish Academy of Sciences, M. Skłodowskiej-Curie 34, 41-819 Zabrze, Poland.
Molecules. 2025 Sep 3;30(17):3600. doi: 10.3390/molecules30173600.
The aim of the work was to develop a highly effective catalyst for the conversion of furfural into furfuryl alcohol through catalytic transfer hydrogenation, which is an important process for converting biomass-derived compounds into valuable chemicals. A highly mesoporous silica was modified with various zirconium and aluminium precursors to obtain Lewis acid centres. The materials were characterised by nitrogen adsorption, FTIR spectroscopy, pyridine adsorption, thermogravimetry, SEM and XRD. The catalytic properties of the materials versus acid site concentration, alcohol type, zirconium content and reaction time were investigated in a batch reactor. The zirconium propoxide-modified materials appeared to be the most active and selective catalysts in the reaction studied. They showed complete furfural conversion with ca. 99% selectivity of furfuryl alcohol, which was attributed to the predominantly Lewis acidic character of these catalysts. High productivity, 15.2 mol/mol·h, was obtained for the most active catalyst. Good catalytic stability was confirmed in repeated cycles. The oxide form of zirconium and aluminium species resulted in the mixed Lewis and Brönsted acidity, which encouraged further transformation of furfuryl alcohol into butyl furfuryl ether, angelica lactone and butyl levulinate. The elaborated catalyst offers a promising approach for converting renewable resources into industrially relevant chemicals.
这项工作的目的是开发一种高效催化剂，用于通过催化转移氢化将糠醛转化为糠醇，这是将生物质衍生化合物转化为有价值化学品的重要过程。用各种锆和铝前驱体对高度介孔的二氧化硅进行改性，以获得路易斯酸中心。通过氮气吸附、傅里叶变换红外光谱、吡啶吸附、热重分析、扫描电子显微镜和X射线衍射对材料进行表征。在间歇式反应器中研究了材料对酸位点浓度、醇类型、锆含量和反应时间的催化性能。丙醇锆改性材料似乎是所研究反应中最具活性和选择性的催化剂。它们显示出糠醛完全转化，糠醇选择性约为99%，这归因于这些催化剂主要具有路易斯酸性。对于最具活性的催化剂，获得了15.2 mol/mol·h的高生产率。在重复循环中证实了良好的催化稳定性。锆和铝物种的氧化物形式导致了混合的路易斯酸性和布朗斯特酸性，这促进了糠醇进一步转化为丁基糠基醚、当归内酯和丁基乙酰丙酸酯。所制备的催化剂为将可再生资源转化为工业相关化学品提供了一种有前景的方法。
