Data for: Characterization of catalysts supported on alumina for acetalization of biomass-derived furfural with ethanol

Biomass-derived furfural has been considered an excellent platform molecule, which can be converted into valuable products to the biorefinery industry. Accordingly, acetalization of furfural is key route toward a variety of chemicals and biofuels, such as furfural diethyl acetal and heterogeneous catalyst plays a central role in this reaction. In this paper, mono and bimetallic catalyst of Rh, Pt and Ni supported on alumina were synthesized in aqueous solution varying the proportion of each active metal between 1 and 3 wt%. These catalysts were tested for the selective acetalization of furfural in a mixture containing furfural diluted in ethanol. The effect of reaction parameters, such as the catalyst loading, reaction temperature, and furfural/ethanol molar ratio on the furfural conversion were assay. The characterization of catalysts by Brunauer- Emmett-Teller, Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS) and thermogravimetric analysis (TGA) of the fresh, used and reused catalysts were investigated in detail and a possible synthesis mechanism of acetalization of FFR was discussed by Fourier transform infrared spectroscopy. Furfural conversion of 85% and product selectivity of 100% were attained under the optimized reaction conditions: time of 30 min, temperature of 100 °C, catalyst loading of 3 wt % (1.5%Ni-1.5%Rh), and furfural/ethanol ratio of 1:100. The catalyst was also successfully applied to the acetalization of various biomass-derivatives with ethanol.生物质基糠醛（furfural）是一类优异的平台化合物，可转化为生物炼制产业所需的高附加值产物。糠醛的缩醛化反应是制备多种化学品与生物燃料（如糠醛二乙基缩醛）的关键路径，而多相催化剂在该反应中发挥核心作用。本文以氧化铝为载体，在水溶液中合成了铑（Rh）、铂（Pt）、镍（Ni）基负载型单金属与双金属催化剂，各活性金属的负载量介于1 wt%至3 wt%之间。以乙醇稀释的糠醛混合体系为反应底物，对上述催化剂的糠醛选择性缩醛化反应性能进行了测试。考察了催化剂负载量、反应温度、糠醛与乙醇摩尔比等反应参数对糠醛转化率的影响。通过布鲁瑙厄尔-埃梅特-特勒（Brunauer-Emmett-Teller, BET）比表面积分析法、透射电子显微镜（TEM）、X射线光电子能谱（XPS）以及热重分析（TGA），对新鲜态、使用后及回收复用的催化剂进行了详细表征；并借助傅里叶变换红外光谱（FTIR）探讨了糠醛缩醛化反应可能的机理。在优化后的反应条件下（反应时间30 min、反应温度100 ℃、催化剂负载量3 wt%（1.5%Ni-1.5%Rh）、糠醛与乙醇摩尔比1:100），可实现85%的糠醛转化率与100%的产物选择性。该催化剂还可成功应用于多种生物质基衍生物与乙醇的缩醛化反应。