Al_2(SO_4)_3-NH_3·H_2O法大孔拟薄水铝石的制备及其应用  

Preparation of macropore pseudo-poehmite by Al_2( SO_4)_3-NH_3·H_2O process and its application

作　　者：王楚[1,2] 冯辉霞[1] 梁顺琴[2] 张忠东[2] 马好文[2] 孙利民[2] 

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]中国石油天然气股份有限公司兰州化工研究中心,甘肃兰州730060

出　　处：《工业催化》2015年第7期541-544,共4页Industrial Catalysis

摘　　要：在Al3+浓度0.6 mol·L-1、反应温度60℃和p H=9条件下,研究了硫酸铝滴定氨水(酸滴碱法)、氨水滴定硫酸铝(碱滴酸法)、p H摆动法和并流法成胶方式对共沉淀法制得的拟薄水铝石物化性能的影响。采用X射线衍射、N2吸附-脱附和扫描电镜等对拟薄水铝石进行表征。结果表明,成胶方式对拟薄水铝石物理性能影响显著,采用并流法成胶方式制得的拟薄水铝石比表面积374 m2·g-1,孔容0.89 cm3·g-1,孔径6.4 nm且分布集中,结晶度高,纯度好,能够满足加氢催化剂载体所用拟薄水铝石的物化性能要求。以并流法成胶方式得到的拟薄水铝石制备的Pd/Al2O3催化剂用于裂解汽油双烯烃选择加氢时表现出优异的加氢性能。Pseudo-boehmite was prepared by A12 （SO4）3-NH3 · H20 process. Under the condition of Al3＋ concentration 0.6 mol ·L- 1, reaction temperature 60 ~C and pH = 9, the influence of precipitation methods on the physicochemical properties of pseudo-boehmite was investigated by X-ray diffraction, nitrogen adsorption-desorption and scanning electron microscope. The results showed that the precipitation methods had great influence on product properties. The pseudo-boehmite obtained by the parallel flow method possessed specific surface area of 374 m2 · g-1 ,pore volume of 0.89 cm3 · g-1 ,pore diameter of 6.4 nm with intensive distribution, high crystallinity and good purity,which could meet the requirement of physical properties of pseudo-boehmite for the preparation of hydrogenation catalyst supports. The supported Pd/Al2 O3 catalyst prepared from pseudo-boehmite obtained by the parallel flow method exhibited excellent hydrogenation performance in dialkenes selective hydrogenation reaction of pyrolysis gasoline.

关 键 词：催化剂工程 拟薄水铝石 成胶方式 裂解汽油 PD/AL2O3 催化剂 

分 类 号：TQ426.6[化学工程] O643.36[理学—物理化学]