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采用无有机模板剂一步法制备了Ru/ZSM-5催化剂,利用X射线衍射、N_2吸附-脱附、NH_3-程序升温脱附和CO_2-程序升温脱附、扫描电镜和透射电镜等方法对催化剂进行了表征.考察了反应温度、钌负载量和催化剂重复利用等因素对Ru/ZSM-5上葡萄糖加氢反应性能的影响,并与浸渍法制备的Ru/ZSM-5催化剂进行了对比.结果表明,与传统浸渍法相比,一步法制备的Ru/ZSM-5催化剂钌粒子具有更高的分散性和稳定性.在120℃和4 MPa的温和反应条件下,葡萄糖接近完全转化,山梨醇选择性高达99.2%,催化剂可重复利用5次,仍保持较高活性.
The Ru / ZSM-5 catalyst was prepared by one step method without organic template. The catalysts were characterized by X-ray diffraction, N 2 adsorption-desorption, NH 3 temperature programmed desorption and CO 2 temperature programmed desorption, scanning electron microscopy and transmission electron microscopy The effects of reaction temperature, ruthenium loading and catalyst recycle on the hydrogenation of glucose on Ru / ZSM-5 were investigated and compared with that of Ru / ZSM-5 catalyst prepared by impregnation method. Compared with the traditional impregnation method, the Ru / ZSM-5 catalyst prepared by one-step method has higher dispersibility and stability.When the reaction temperature is 120 ℃ and mild pressure is 4 MPa, the glucose is nearly completely converted and the sorbitol selectivity Up to 99.2%, the catalyst can be reused 5 times, still maintain a high activity.