The acetalization of acetone with glycerol was investigated using vanadium-impregnated catalysts. The siliceous supports FER, a purely microporous material, and ITQ-6, a micro/mesoporous material, were obtained from a ferrierite lamellar precursor, PreFER. Both supports were impregnated with 1, 5 or 10 wt.% of vanadium. The structural properties were characterized by X-ray diffraction and N₂ adsorption/desorption, the dispersion and speciation of surface vanadium were analyzed by diffuse reflectance UV–vis spectroscopy and X-ray absorption spectroscopy (XANES and EXAFS), and the total acidities of the catalysts were evaluated by temperature-programmed NH₃ desorption. The [5V]Si-ITQ-6 and [10V]Si-ITQ-6 catalysts provided the best catalytic results, with conversions of 100 and 90%, respectively, and selectivity towards solketal of approximately 99%. The higher surface area generated by mesoporosity in the Si-ITQ-6 support, compared to the microporous Si-FER support, provided good access for the diffusion of reactants and products, and good dispersion of vanadium, even at high vanadium loadings (10 wt.%), with preferential formation of VO₄ monomers and VO_x oligomers on the surface. The greater contributions of these species to the total acidities of the catalysts resulted in higher catalytic activities, compared to the effect of V₂O₅ agglomerates.

使用钒浸渍的催化剂研究了丙酮与甘油的缩醛化反应。硅质载体FER（纯微孔材料）和ITQ-6（微/中孔材料）是从镁碱沸石层状前体PreFER获得的。两种载体都浸渍有1、5或10重量％的钒。通过X射线衍射和N ₂吸附/解吸表征结构性能，通过漫反射紫外可见光谱和X射线吸收光谱（XANES和EXAFS）分析表面钒的分散和形态。催化剂通过程序升温的NH ₃进行评估解吸。[5V] Si-ITQ-6和[10V] Si-ITQ-6催化剂提供了最佳的催化效果，分别具有100％和90％的转化率，对缩酮的选择性约为99％。与微孔Si-FER载体相比，Si-ITQ-6载体中介孔产生的表面积更大，即使在高钒负载量（10 wt％ ％），在表面上优先形成VO ₄单体和VO _x低聚物。与V ₂ O ₅附聚物的作用相比，这些物质对催化剂总酸度的更大贡献导致更高的催化活性。