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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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zn-fe尖晶石型复合氧化物催化分解n2o
, PP. 729-734
Keywords: n2o,催化分解,zn-fe尖晶石型复合氧化物,焙烧温度,k改性
Abstract:
？用共沉淀法制备了zn-fe尖晶石型复合氧化物催化剂,用于有氧气氛中n2o的分解反应;考察了复合氧化物的组成、焙烧温度及k改性对其催化活性的影响,并用氮气吸附、xrd和h2-tpr等技术对催化剂结构进行了表征。结果表明,zn-fe尖晶石型复合氧化物具有良好的催化n2o分解的活性;在优化出的zn0.8fe0.2fe2o4-400催化剂上500℃下连续反应10h时,有氧无水和有氧有水条件下n2o转化率分别达到63.5%和22.2%。k改性zn-fe尖晶石型复合氧化物的催化活性均不及纯zn-fe氧化物,这是由于k改性催化剂的比表面积显著降低,而且k粒子迁移至催化剂表面,抑制了feox的还原和表面氧物种的脱除。
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