摘要
采用沉淀方法制备了氧化铬催化剂,并用于NO催化氧化反应,首次发现该催化剂具有常温氧化活性,考察了沉淀剂和焙烧温度等制备条件对其活性的影响。结果发现,相比于常规的活性炭及活性炭纤维,氧化铬催化剂在常温催化氧化NO方面表现出了更加优异的活性及稳定性,当NO质量分数为15μg/g,空速为43 200 m L/h时,可维持800 min以上100%净化率,采用氨水、碳酸氢铵、氢氧化钾作为沉淀剂时,300℃焙烧得到的氧化铬催化剂具有很好的活性及稳定性。
Chromic oxide catalysts are prepared with a precipitation method for catalytic oxidation of NO at room temperature. The effects of the precipitant,calcination temperature,concentration of NO and space velocity on NO conversion over the chromic oxide catalyst are investigated. Chromic oxide catalysts exhibit superior catalytic activity and long-time stability for NO oxidation compared with conventional activated carbon nanofibers and activated carbon. When the concentration of NO is 15 ppm and space velocity is 43 200 m L·h^（-1）·g^（-1）,100% of NO removal rate can be kept above 800 minutes over the chromic oxide catalyst. The chromic oxide catalysts prepared using ammonia,NH4HCO3 and KOH as the precipitants and calcined at 300℃ show considerably high NO removal rate and good long time running. The catalyst exhibits high activity at low temperature and very good stability during its life-testing experiment as well as excellent regeneration property in regeneration experiment.
出处
《现代化工》
CAS
CSCD
北大核心
2016年第3期129-132,共4页
Modern Chemical Industry
关键词
一氧化氮
常温催化氧化
氧化铬催化剂
沉淀剂
半封闭空间
nitric oxide（NO）
catalytic oxidation at room temperature
chromic oxide catalysts
precipitant
semi-closed space
