摘要
以氧氯化锆和过渡金属硝酸盐为原料,溶胶-凝胶法制备氧化锆载体,采用溶液浸渍法制备出负载型纳米复合氧化物催化剂。对过渡金属氧化物(Mn、Ni、Cu、Fe和Co)催化剂进行初步筛选,其中Mn2O3/ZrO2催化活性最佳。考察了活性组分含量、焙烧温度和焙烧时间等对催化剂催化活性的影响。催化剂的最佳制备条件:锰负载量为6%,450℃焙烧6 h。丙酮的转化率达62%。通过TEM、SEM、XRD和TG-DTA对催化剂结构进行了表征。结果显示,催化剂颗粒均匀,大小约为20 nm;无定形的Mn2O3是催化剂的活性中心。
Supported nanoparticle transition oxides catalysts were prepared by impregnation method, using zirconium oxychloride and transition metal nitrates as the raw material, with zirconia carrier prepared by sol-gel method. Screening was made among different transition metal oxides （ Mn, Ni, Cu, Fe, Co）. Mn2O3/ZrO2 exhibited the best catalytic activity. Effects of preparation condition （active component content, calcination temperature and time ） on the activity were investigated. The optimum preparation condition： manganese loadings 6%, calcination temperature 450℃, calcination time 6 h. Acetone conversion of 62% was obtained. XRD, TEM, SEM and TG-DTA results indicated that the catalyst had uniform particles of about 20 nm; amorphous Mn2O3 was the active species of the catalyst.
出处
《工业催化》
CAS
2007年第9期58-61,共4页
Industrial Catalysis
基金
江苏省环境材料与环境工程重点实验室(JLEM0501)
