摘要
用原位红外技术研究了银催化剂及其载体α -氧化铝的表面酸性 ,并比较了载体α -氧化铝与加铯和未加铯的银催化剂的表面酸性的差别。研究表明 :载体α -氧化铝上负载了银后 ,其L酸性中心浓度有所下降 ,而加入助催化剂铯后 ,其L酸性中心浓度更是明显降低。银催化剂及其载体的表面酸性对银催化剂的选择性等性能有较为重要的影响。
This paper studied the surface acidity of silver catalysts and α-alumina crystal carriers,and compared the difference of surface acidity among α-alumina crystal carriers,with silver catalysts only and with silver catalysts promoted by cesium.The results showed that the concentration of Lewis acid sites on α-alumina crystal carriers decreased when silver was loaded on it. And the concentration of Lewis acid sites decreased sharply when cesium was introduced.The surface acidity of silver catalysts and α-alumina crystal carriers effects the performance of selectivity of silver catalysts evidently.
出处
《石油与天然气化工》
CAS
CSCD
北大核心
2004年第2期78-80,共3页
Chemical engineering of oil & gas