Cai Chiliu, Wang Haiyong, Xin Haosheng, Zhu Changhui, Zhang Qi, Zhang Xinghua, Wang Chenguang, Liu Qiying, Ma Longlong
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences 510640 Guangzhou China
Key Laboratory of Renewable Energy, Chinese Academy of Sciences 510640 Guangzhou China.
RSC Adv. 2020 Jan 23;10(7):3993-4001. doi: 10.1039/c9ra10394e. eCollection 2020 Jan 22.
Ni/LaO/ZrO catalysts were prepared by a step-by-step impregnation method through regulation of the contents of the active component and alkali. The introduction of an alkaline promoter not only enhanced the alkalinity of the catalyst but also improved the dispersion of Ni on the catalyst owing to the strong interaction between Ni and alkali promoter. The synergistic effect between Ni and LaO was beneficial to selective hydrogenolysis of sorbitol. Under the optimal reaction conditions, sorbitol conversion reached nearly 100% and target products (ethylene glycol, 1,2-propanediol, and glycerol) selectivity reached 74.8%. Metal-alkali coordination mechanism and possible pathways for target products formation were proposed.
通过逐步浸渍法，通过调节活性组分和碱的含量制备了Ni/LaO/ZrO催化剂。碱性助剂的引入不仅增强了催化剂的碱性，还由于Ni与碱性助剂之间的强相互作用提高了Ni在催化剂上的分散度。Ni与LaO之间的协同作用有利于山梨醇的选择性氢解。在最佳反应条件下，山梨醇转化率接近100%，目标产物（乙二醇、1,2-丙二醇和甘油）选择性达到74.8%。提出了金属-碱配位机理和目标产物形成的可能途径。
