摘要
采用溶胶—凝胶技术 ,聚乙烯醇 ( PVA)为络合剂 ,合成出尖晶石型大比表面纳米粒子Mg Al2 O4 ,用硝酸盐浸渍分解法制备出负载型 La0 .8Sr0 .2 Co O3/ Mg Al2 O4 催化剂 ,以 XRD、BET、TPR、二甲苯完全氧化等手段 ,研究了合成条件对形成的 Mg Al2 O4 性质的影响及催化剂的性能 ,并与负载型 L a0 .8Sr0 .2 Co O3/堇青石、La0 .8Sr0 .2 Co O3/ γ-Al2 O3催化剂进行了对比 .结果表明 ,活性组分在 Mg Al2 O4 载体上是高度分散的 ,负载型 La0 .8Sr0 .2 Co O3/ Mg Al2 O4
Spinel MgAl 2O 4,which has a large specific surface area and nano range particle size,was synthesized using sol gel technique with a certain amount of PVA.A series of supported catalysts La 0.8 Sr 0.2 CoO 3/MgAl 2O 4 were prepared by impregnating support MgAl 2O 4 with the solutions of corresponding nitrates.The characterizations and evaluations of the support MgAl 2O 4 and the supported catalysts La 0.8 Sr 0.2 CoO 3/MgAl 2O 4 were examined by means of XRD,BET,TPR,complete oxidation reaction of xylene etc.,and compared with that of supported catalyst La 0.8 Sr 0.2 CoO 3/cord and La 0.8 Sr 0.2 CoO 3/ γ Al 2O 3.The results shown that the active component had a high degree of dispersion on the support MgAl 2O 4 and the supported catalysts La 0.8 Sr 0.2 CoO 3/MgAl 2O 4 had a good catalytic activity and ability of sintering resistance.
出处
《内蒙古大学学报（自然科学版）》
CAS
CSCD
北大核心
2001年第5期527-530,共4页
Journal of Inner Mongolia University：Natural Science Edition
基金
国家自然科学基金资助项目 ( 2 98690 0 1 )
