化学工程2018，Vol.46Issue(3)：10-15,6.DOI:10.3969/j.issn.1005-9954.2018.03.003
磁性铁基氧化物SCR脱硝催化剂的改性研究
Modification of magnetic iron-based oxide catalyst for selective catalytic reduction of NOx with NH3
摘要
Abstract
A kind of iron-based oxide catalyst showing excellent NH3-SCR (selective catalytic reduction of NO with NH3) activity is significant to control NOx emission from power plant.Microwave irradiation was used to assist the citric acid sol-gel method to prepare a new magnetic iron-based oxide catalyst,and the enhancement of cerium and tungsten addition on its NH3-SCR activity were also investigated.Finally,the influence of calcination temperature and citric acid on the NH3-SCR activity of magnetic iron-cerium-tungsten mixed oxide catalysts were studied.The results indicate that a new magnetic iron-based catalyst could be obtained through the citric acid sol-gel method assisted by microwave irradiation.Their NH3-SCR activity could be improved by the addition of cerium oxide or tungsten oxide.The NH3-SCR activity of magnetic iron-tungsten mixed oxide catalyst firstly increased and then decreased with the molar ratio of cerium increasing from 0.05 to 0.20,and the NH3-SCR activity of magnetic iron-cerium mixed oxide catalyst also firstly increased and then decreased with the molar ratio of tungsten increasing from 0.025 to 0.10.The optimum molar ratio for iron,cerium and tungsten [n(Fe) ∶ n(Ce) ∶ n(W)] was 0.85 ∶ 0.10 ∶ 0.05.The NH3-SCR activity over Fe0.85 Ce0.10 W0.05Oz firstly increased and then decreased when the calcination temperature or the molar ratio of citric acid and metal cation increased from 400 ℃ to 600 ℃ or from 0.25 to 0.10,respectively.The optimum calcination temperature is 500 ℃ and the appropriate molar ratio of citric acid and metal cation is 0.50.关键词
磁性铁基氧化物/NH3-SCR脱硝性能/铈钨改性/柠檬酸Key words
magnetic iron-based oxide/NH3-SCR activity/cerium-tungsten modification/citric acid分类
资源环境引用本文复制引用
白鹏,熊志波,武超,周飞,金晶,丁旭春..磁性铁基氧化物SCR脱硝催化剂的改性研究[J].化学工程,2018,46(3):10-15,6.基金项目
国家自然科学基金资助项目(51406118) （51406118）
上海高校青年教师培养资助计划资助 （）
