摘要
用阳极氧化法制备了填料式 Al2 O3-Al载体 ,经浸渍 H2 SO4 后再焙烧制得 SO2 - 4/Al2 O3-Al固体酸催化剂 .用 SEM,BET,XRD和 NH3-TPD等手段对其进行了表征 ,结果显示 ,载体 Al2 O3膜为无定形结构 ,SO2 - 4/Al2 O3-Al为中等酸强度的固体酸 .用乙酸 -乙醇酯化催化反应评估了该固体酸的催化性能 ,显示出催化剂具有较高的催化活性 。
A novel solid acid SO 2- 4/Al 2O 3-Al catalyst for catalytic distillation was prepared by impregnation of anodized aluminium plates formed by anodic oxidation of high-purity aluminium foils with aqueous H 2SO 4, and characterized by SEM, BET, XRD and NH 3-TPD. XRD patterns of the samples show that the support anodized Al 2O 3 layer is amorphous oxide supporting. NH 3-TPD results show that the catalyst has intermediate acid sites. The catalyst was active for the esterification of acetic acid with ethanol, and can be reused directly for 5 times, which means the catalyst has a good stability.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第10期1916-1919,共4页
Chemical Journal of Chinese Universities
基金
吉林省科技厅自然科学基金 (批准号 :19990 5 5 7)资助
