高温高表面氧化铝新材料的制备化学研究 Ⅳ.镧组分对溶胶-凝胶法制高比表面Al_2O_3的影响  

RESEARCH ON A NEW CATALYTIC MATERIAL-HIGH TEMPERATURE RESISTANT ALUMINA WITH HIGH SPECIFIC SURFACE AREA Ⅳ.EFFECT OF LANTHANUM ON PREPARING HIGH-SURFACE AREA ALUMINA BY SOL-GEL METHOD

作　　者：龚茂初[1] 林之恩[1] 高士杰[1] 章洁 文梅[1] 陈耀强[1] 郑林[2] 许清淮[2] 李孝维[2] 

机构地区：[1]四川大学化学学院,四川成都610064 [2]四川川化集团公司催化剂厂,四川成都610301

出　　处：《燃料化学学报》2001年第1期76-79,共4页Journal of Fuel Chemistry and Technology

基　　金：四川省应用基础基金&&

摘　　要：A high temperature resistant alumina with high specific surface area was prepared by sol-gel method. XRD,TEM,XPS and surface analysis method were used to study the effect of dopant lanthanum on the alumina.The results showed that lanthanum ion could suppress alumina transition to α-phase and then inhibit alumina from sintering and the thermal stability of the Al 2O 3 was improved. Different ratios of La/Al had different effects on the specific surface area of Al 2O 3.The Al 2O 3 containing 1.0 mol/% lanthanum has a BET specific surface area of 71.8 m 2/g after calcination for 32 hours at 1*#100℃, whereas the undoped Al 2O 3 only had a BET specific surface area of 10 m 2/g under similar conditions.A high temperature resistant alumina with high specific surface area was prepared by sol-gel method. XRD,TEM,XPS and surface analysis method were used to study the effect of dopant lanthanum on the alumina.The results showed that lanthanum ion could suppress alumina transition to α-phase and then inhibit alumina from sintering and the thermal stability of the Al 2O 3 was improved. Different ratios of La/Al had different effects on the specific surface area of Al 2O 3.The Al 2O 3 containing 1.0 mol/% lanthanum has a BET specific surface area of 71.8 m 2/g after calcination for 32 hours at 1*#100℃, whereas the undoped Al 2O 3 only had a BET specific surface area of 10 m 2/g under similar conditions.

关 键 词：高表面氧化铝 溶胶-凝胶法 镧 热稳定性 制备 催化剂载体 

分 类 号：TQ426.65[化学工程]