一种制备活性氧化铝的新方法  

A Novel Method for Preparation of Activated Alumina

作　　者：谭亚南[1] 李枫[1] 伊晓东[1] 王跃敏[1] 方维平[1] 万惠霖[1] 

机构地区：[1]厦门大学化学化工学院化学工程与生物工程系,固体表面物理化学国家重点实验室,醇醚酯化工清洁生产国家工程实验室,福建厦门361005

出　　处：《催化学报》2008年第10期975-978,共4页

基　　金：国家重点基础研究发展计划(973计划,2004CB217805);福建省“百千万人才工程”项目;福建省自然科学基金(U0750016)

摘　　要：将结晶氯化铝与柠檬酸及淀粉等造孔剂混合,经直接干燥和焙烧制得了一种无定形活性氧化铝,并通过X射线粉末衍射、N2物理吸附及氨程序升温脱附等手段对活性氧化铝样品进行了表征,探讨了各组分对活性氧化铝样品性质所起的作用.与常规的活性氧化铝制备方法相比,这种制法省去了中和、老化、过滤和洗涤等步骤,缩短制备周期且过程容易控制.活性氧化铝具有适宜且可调节的比表面积和孔径分布,作为载体负载镍金属组分制成负载型催化剂后,对乙苯加氢饱和与加氢裂化表现出较高的催化活性.A novel and simple method was developed to prepare alumina with suitable specific surface area and pore size distribution. First, AlCl3·6H2O and citric acid were heated without water in a water bath at 90 ℃ with stirring until a homogenous solution was obtained. Then starch was added into is solution. After the solution was dried at 110 ℃ and calcined at indicated temperature, activated alumina was obtained. The activated alumina was characterized by N2 adsorption, X-ray diffraction, and NH3 temperature-programmed desorption. Compared with the usual technology, this novel preparation did not include some steps such as aging, filtering, and washing. Moreover, the specific surface area and pore size distribution of the activated alumina could be controlled and modified by changing the preparation parameters. The supported Ni/Al2O3 catalyst with the activated alumina as support showed higher activity for hydrogenation and hydrocracking of ethylbenzene.

关 键 词：活性氧化铝 镍 负载型催化剂 乙苯 加氢 加氢裂化 

分 类 号：O614.31[理学—无机化学]