欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
以球形γ-Al2O3 和θ-Al2O3 为载体,分别采用超声浸渍和普通浸渍方法制备了Pd含量为0.3%的负载型催化剂,并将其用于蒽醌加氢反应. 采用X射线衍射、 N2吸附和透射电镜等手段对催化剂的理化性质和孔结构进行了分析,考察了浸渍方法对催化剂活性金属分散度的影响. 结果表明,与普通浸渍法相比,超声浸渍法制备的负载型Pd催化剂金属分散度明显提高,因而对蒽醌加氢反应表现出较高的催化活性. 以960 ℃焙烧的球形θ-Al2O3 为载体,通过超声浸渍制备的负载型Pd催化剂具有较高的Pd分散度和较大的孔径,在蒽醌加氢反应中对反应物的扩散阻力较小,因而表现出更高的催化活性,而且反应中催化剂的稳定性良好.
英文摘要：
Palladium catalysts supported on spherical γ-Al2O3 and θ-Al2O3 with palladium loading of 0.3 % were prepared with and without ultrasonic treatment during the impregnation step. Structural and physical properties of the catalysts were characterized by X-ray diffraction, Na adsorption, and transmission electron microscopy. The effects of ultrasonic treatment on the Pd distribution and anthraquinone hydrogenation activity of the catalysts were investigated. The results show that the activity of the supported catalysts prepared with ultrasonic treatment for anthraquinone hydrogenation is higher than those without ultrasonic treatment. Compared with the Pd/γ-Al2O3 catalyst, the supported catalyst Pd/θ-Al2O3 prepared under the same condition of ultrasonic treatment during the impregnation step has higher catalytic activity and stability in anthraquinone hydrogenation.
同期刊论文项目
同项目期刊论文
期刊信息
位置：