钯银纳米合金催化剂的制备及其催化性能  

Preparation and catalytic properties of Pd-Ag nanoalloy catalyst

作　　者：车春霞[1,2] 韩伟 苟尕莲 唐瑜[1] 冯琪 梁玉龙 张峰 钱颖 常晓昕 

机构地区：[1]兰州大学化学化工学院,甘肃兰州730000 [2]中国石油石油化工研究院兰州中心,甘肃兰州730060 [3]中国石油石油化工研究院,北京100083

出　　处：《现代化工》2016年第9期135-138,共4页Modern Chemical Industry

摘　　要：采用微乳液方法同时进行活性组分及助剂负载,制备得到钯银双金属催化剂;通过SEM、XRD、CO化学吸附、HRTEM、原位红外等分析手段对催化剂进行表征;采用碳二前加氢工艺对催化剂反应性能进行评价。结果表明:制备得到的Pd-Ag/α-Al_2O_3催化剂的载体孔道丰富,孔结构较为规整;活性组分钯、助剂银形成纳米合金,分散性好,粒径分布较为均一;催化剂表面酸性较低;催化剂具有优异的活性、选择性和抗结焦性能,各项性能指标均优于工业装置考核指标要求,具有良好工业应用前景。Pd-Ag bimetallic catalyst is obtained by the methods of micro emulsion. The catalysts are characterized by means of SEM,XRD,CO chemisorption,HRTEM,in situ FT-IR analysis,etc. Catalyst performance is tested in industrial siding device. The results show that the Pd-Ag / α-Al_2O_3 catalyst is prepared and is enriched with the carrier pore channels. The nano alloy formed from Pd and Ag has good dispersion property and uniform particle size distribution.The surface acidity of the catalyst is lower. The resultant catalyst has excellent activity,selectivity and anti-coking performance. All the performance indicators are better than requirements of industrial equipment evaluation index. The catalyst has good prospects for industrial applications.

关 键 词：微乳液法 纳米催化剂 合金 

分 类 号：TQ426[化学工程]