Insight into Platinum Poisoning Effect on Cu-SSZ-13 in Selective Catalytic Reduction of NOx with NH3

被引：4
|
作者：
Zhao, Huawang [1 ]
Han, Lei [2 ]
Wang, Yujie [3 ]
Zheng, Jiandong [3 ]
机构：
[1] Huaqiao Univ, Coll Chem Engn, Dept Environm Sci & Engn, Xiamen 361021, Peoples R China
[2] Tianjin Univ, Sch Chem Engn, Tianjin 300072, Peoples R China
[3] Chuzhou Univ, Sch Mat & Chem Engn, Chuzhou 239000, Peoples R China
来源：
CATALYSTS | 2021年 / 11卷 / 07期
关键词：
Pt poisoning; Cu-SSZ-13; NH3-SCR; regeneration; HYDROTHERMAL STABILITY; CU-SAPO-34; CATALYST; CHEMICAL DEACTIVATION; NH3-SCR; PROMOTION; CU/SAPO-34; IMPACT; FE;
D O I：
10.3390/catal11070796
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Platinum's (Pt) poisoning effect on Cu-SSZ-13 and its regeneration were investigated. The Pt enhanced the parallel reactions, such as NH3 oxidation and NO oxidation reactions, which decreased the deNOx activities. In the temperature range below 330 degrees C, the deactivation of Cu-SSZ-13 by Pt poisoning was primarily caused by the overconsumption of NH3, due to the enhanced NH3-selective oxidation reaction, while the formation of NOx in NH3 oxidation and NO oxidation into NO2 further aggravated the degradation when the temperature was above 460 degrees C. The non-selective NH3 oxidation and non-selective NOx catalytic reduction reactions resulted in increased N2O formation over Pt-doped samples. The transformation of Pt-0 into PtOx after hydrothermal aging recovered the deNO(x) activities of the Pt-poisoned samples.
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页数：10
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