【摘要】 分子筛负载贵金属双功能催化剂广泛应用于生物质加氢脱氧反应中，然而，金属-酸平衡对生物质转化的反应规律尚不明确。基于此，以Pt（NH₄）₄Cl₂为金属前驱体，采用浸渍法制备负载型的Pt/HBeta双功能催化剂，利用X射线粉末衍射、扫描电子电镜、N₂吸附-脱附、X射线光电子能谱、透射电子显微镜和氨气-程序升温脱附等表征手段对催化剂晶体结构、金属分布和载体酸性等物化性质进行表征。在调变硅/铝摩尔比（n（SiO₂）/n（Al₂O₃））为30、65以及纯硅的HBeta分子筛的基础上，制备Pt负载质量分数分别为0.2%、0.6%及1.0%的催化剂，研究催化剂金属-酸平衡对苯甲醚加氢脱氧反应性能及反应路径的影响。结果表明，降低HBeta硅/铝摩尔比，有利于金属Pt物种的分散，而Pt/HBeta在苯甲醚加氢脱氧（HDO）反应中的催化性能和反应路径取决于金属Pt的负载量和HBeta酸中心的协同效应，尤其是HBeta的酸量。此外，在不同硅/铝摩尔比、不同Pt负载量的Pt/HBeta催化剂中，具有良好金属-酸平衡的1.0%Pt/HBeta-2表现出优异的催化性能。更多还原

【Abstract】 Zeolite-supported noble metal bifunctional catalysts are widely used in biomass hydrodeoxygenation reactions. However, the reaction mechanism of biomass conversion under the effect of metal-acid balance still remains unclear. Based on this, Pt（NH₄）₄Cl₂ was used as a metal precursor to prepare the supported Pt/HBeta bifunctional catalyst by impregnation method. The physico-chemical properties the catalyst, such as crystalline structure, metal distribution, and acidic properties, were extensively characterized by means of X-ray powder diffraction, scanning electron microscopy, N₂ adsorption-desorption, X-ray photoelectron spectroscopy, transmission electron microscopy and ammonia-temperature programmed desorption. Based on HBeta zeolites with Si/Al molar ratios of 30, 65, and pure silica, catalysts with the Pt loadings of 0.2%, 0.6%, and 1.0%（mass fraction） were prepared, so as to investigate the effect of metal-acid balance of the catalysts on the performance and reaction pathway of anisole hydrodeoxygenation. The results indicate that reducing the Si/Al molar ratio of HBeta favors the dispersion of Pt species. The catalytic performance and reaction pathway of Pt/HBeta in anisole hydrodeoxygenation reaction depend on the loading of Pt and synergistic effect of HBeta acidity, especially the acid amount of HBeta. Furthermore, among the Pt/HBeta catalysts with different Si/Al molar ratios and Pt loadings, 1.0%Pt/HBeta-2 with a well-balanced metal-acid ratio exhibits excellent catalytic performance.更多还原