不同扩孔方法对催化剂载体氧化铝孔结构的影响  

EFFECTS OF VARIOUS PORE-ENLARGING METHODS ON THE PORE STRUCTURE OF ALUMINA CATALYST SUPPORT

作　　者：李广慈[1] 赵会吉[1] 赵瑞玉[1] 刘晨光[1] 

机构地区：[1]中国石油大学重质油国家重点实验室CNPC催化重点实验室,青岛266555

出　　处：《石油炼制与化工》2010年第1期49-54,共6页Petroleum Processing and Petrochemicals

基　　金：重质油国家重点实验室应用基础研究资助项目

摘　　要：分别采用扩孔剂法和水热处理法对氧化铝载体进行处理,考察不同扩孔方法对氧化铝载体孔结构的影响。结果表明,采用不同的扩孔剂对氧化铝孔结构影响不同。扩孔剂聚丙烯酰胺加入量(w)为15%、800℃焙烧后可得到平均孔径为14.3nm的氧化铝载体;加入一定量的扩孔剂NH4HCO3,控制n(HCO-)/n(Al3+)=0.75,经高温焙烧后可制得平均孔径为10nm的介孔氧化铝;在140℃下对氧化铝进行水热处理,发现不同的水热处理时间对氧化铝孔结构有显著影响;同时孔结构随焙烧温度的不同呈规律性的变化。Alumina support was treated by adding pore-enlarging additives and hydrothermal treatment respectively to study the effects of various pore-enlarging methods on the pore structure of alumina. Results indicated that the pore structure of alumina varied with the various pore-enlarging additives. An alumina support having an average pore size of 14.3 nm was prepared by adding 15% of polyacrylamide （PAM） and calcined at 800℃ for 4 h. Alumina support with an average pore size of about 10 nm was obtained by adding NH4HCO3 at a n（HCO3^- ）/n（Al^3＋） of 0.75. It was found that the treating time had significant effect on the pore structure of alumina when hydrothermal treating alumina at 140 ℃ , and the pore structure of alumina changed with the calcination temperature as well.

关 键 词：氧化铝载体 扩孔剂 水热处理 孔结构 

分 类 号：TQ426.6[化学工程]