Ni基双金属催化剂的制备及其加氢脱氧反应性能

采用浸渍法制备了一系列负载于γ-Al₂O₃上的Ni基双金属催化剂，考察助剂金属(Mo, Co, Ce)对Ni基催化剂加氢脱氧反应性能的影响。采用X射线衍射、低温N₂物理吸附、NH₃程序升温脱附、H₂程序升温还原、X射线光电子能谱等表征手段对催化剂进行表征。以正丁醇为模型化合物，在固定床微型反应装置上对催化剂的加氢脱氧性能进行评价，结果表明助剂Ce对催化剂加氢脱氧反应性能的促进作用最为显著，在210℃时基本实现正丁醇的完全转化，助剂Mo对C—O键的活化能力更强，对产物正丁烷的选择性明显高于其余助剂。

PREPARATION OF Ni-BASED BIMETALLIC CATALYSTS AND THEIR CATALYTIC PERFORMANCE OF HYDRODEOXYGENATION

A series of Ni-based bimetallic catalysts supported on γ-Al₂O₃ were prepared by impregnation method. The effects of metal promoters (Mo, Co and Ce ) on the hydrodeoxygenation（HDO）performance of Ni-based catalysts were investigated. The catalysts were characterized by XRD, N₂ physical adsorption at low temperature, NH₃-TPD, H₂-TPR and XPS. Using n-butanol as model compound, the HDO performance of catalysts was evaluated in a fixed-bed micro-reactor. The results showed that the promoter Ce had most significant effect on the HDO performance of the catalyst, the complete conversion of n-butanol was achieved at 210 ℃, while the activation of C-O bond by Mo was stronger, and the selectivity of n-butane was higher than that of other promoters.