• 关键词：铁分子筛  小孔分子筛  氮氧化物  氨选择性催化还原  汽车尾气

• 基金项目：国家自然科学基金（No.21307007，21307144）；吉林省科技厅发展计划项目（No.20140520150JH）

• 刘冬梅
• 四川省环境保护科学研究院, 成都 610041

• 许凤泉
• 长春理工大学化学与环境工程学院, 长春 130022

• 张新艳
• 长春理工大学化学与环境工程学院, 长春 130022

• 张少庆
• 中国科学院东北地理与农业生态研究所, 长春 130102

• 摘要：采用超声辅助浸渍法成功合成了高铁含量的FeMOR-5%-UL催化剂，并且测试其催化还原NO性能.研究发现在超声辅助条件下浸渍制得的催化剂可以引入更高比例的离子交换位上的孤立的Fe³⁺，这些铁离子具有更强的NO还原活性，因此超声辅助浸渍法制备的催化剂催化性能显著高于传统的离子交换法和浸渍法.其中活性最高的FeMOR-5%-UL催化剂在添加SO₂等多种气氛时，催化活性下降不显著.并且在持续100 h的汽车尾气条件下进行的稳定性实验中，FeMOR-5%-UL的催化活性没有明显下降.FeMOR-5%-UL的优异的催化活性和稳定性非常具有应用前景和研究价值.

• Abstract：Fe contained MOR zeolite catalysts with high Fe loadings were successfully synthesized by impregnation assisted by ultrasonic wave, and were tested for NH₃-SCR of NO_x. It is found that large population of isolated Fe³⁺ ions are located on ion exchange positions, the most active sites for NO reduction. The novel FeMOR-x%-UL catalysts exhibit excellent catalytic activities, and they are more active than those prepared by traditional ion exchange and impregnation. The most active FeMOR-5%-UL catalyst shows high resistance to the inhibition of SO₂, CH_x and water vapor. Furthermore, stability tests indicate that the FeMOR-5%-UL catalyst has no obvious deactivation under simulated emission conditions after reaction for more than 100 h. Thus, the FeMOR-5%-UL catalyst shows a great potential as a cost-effective catalyst for NO_x elimination from mobile sources such as diesel exhaust in future applications.

• Key words：Fe zeolites  small pore zeolites  NO_x  selective catalytic reduction with NH₃  vehicle exhaust

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