化工新型材料

化工新型材料 ›› 2020, Vol. 48 ›› Issue (2) : 179-184.

科学研究

Fe-Cu/ZSM-5催化剂NH₃选择性催化还原NO性能研究

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Fe-Cu/ZSM-5 catalyst selectively reduced NO by NH₃-SCR

Munkhjargal Tsetsegjargal, Li Chenxi, Ye Qing, Cheng Jin, Cheng Shuiyuan, Kang Tianfang

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Received		Published
2019-04-17		2020-02-20
Issue Date	Revised Date
2020-03-02	2019-04-17

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摘要

通过旋蒸法制备了Cu/ZSM-5、Fe/ZSM-5和Fe-Cu/ZSM-5 3种样品,使用X射线粉末衍射 (XRD)、N₂-吸附/脱附、氢气程序升温还原 (H₂-TPR)、氨气程序升温脱附 (NH₃-TPD)技术对其进行了表征,并研究了其 NH₃-SCR催化还原NO性能。实验结果表明,Fe和Cu双金属改性Fe-Cu/ZSM-5样品催化性能优异,具有较宽的反应活性温度窗口,在200～560℃范围内的转化率均超过90%,在290～400℃下转化率可达到98%以上。Fe-Cu/ZSM-5样品优异的催化性能与其具有丰富的中酸性位和良好的氧化还原性能密切相关。

Abstract

Cu/ZSM-5,Fe/ZSM-5 and Fe-Cu/ZSM-5 catalysts were prepared by the method of spin evaporation for the selective catalytic reduction of NO_x with NH₃.The properties of the prepared catalysts were characterized by XRD,BET,H₂-TPR and NH₃-TPD technologies.The results shown that Fe and Cu bimetal modification of Fe-Cu/ZSM-5 catalyst had excellent catalytic activity,and shown a wide activity temperature window.The catalytic efficiency of Fe-Cu/ZSM-5 was more than 90% within the scope of 200～560℃,and reached above 98% within the scope 290～400℃.This catalytic activity related with its abundant acid sites and great redox properties.

关键词

Fe-Cu/ZSM-5 / 氮氧化物 / 氨选择性催化还原 (NH₃-SCR)

Key words

Fe-Cu/ZSM-5 / nitrogen oxide / selective catalytic reduction with NH₃ (NH₃-SCR)

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Fe-Cu/ZSM-5催化剂NH₃选择性催化还原NO性能研究[J]. 化工新型材料, 2020, 48(2): 179-184 DOI:

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