摘要
采用溶胶-凝胶法首先制备出Zr(OH)4凝胶,再将凝胶用乙醇进行醇化处理,经烘干和焙烧制得ZrO2纳米载体。载体颗粒粒径均匀,大小为20 nm左右。以ZrO2为载体,采用浸渍法分别负载Fe2O3、CuO、N iO和Mo2O3等不同金属氧化物,制得负载型催化剂。通过XRD、TEM、SEM和IR等对催化剂进行表征。以乙醇氧化脱氢合成乙醛为探针反应,考察了催化剂的催化性能。实验结果表明,催化剂Fe2O3/ZrO2在反应温度为573 K时,乙醇转化率为75.8%,乙醛选择性为97.3%。
Zr（OH）4 gel was prepared by sol-gel method and then alcoholized by ethanol. The Zr（OH）4 gel was dried and calcined to obtain ZrO2 nanoparticles with diameter of about 20 nm. Several catalysts composed of different metal oxides（Fe2O3, CuO, NiO, Mo2O3） supported on zirconia were prepared by impregnation method and characterized by IR, XRD, TEM and SEM. Catalytic activities of the catalysts were investigated using oxidation of ethanol to acetaldehyde as the probe reaction. Ethanol conversion of 75.8% and selectivity to acetaldehyde of 97.3% were attained over Fe2O3/ZrO2 at reaction temperature of 573 K.
出处
《工业催化》
CAS
2006年第9期29-32,共4页
Industrial Catalysis
基金
江苏省教育厅科技基金资助项目(02KJD150012)
