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Insight into Platinum Poisoning Effect on Cu-SSZ-13 in Selective Catalytic Reduction of $NO_{x}$ with $NH_{3}$
Content Provider | MDPI |
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Author | Zhao, Huawang Han, Lei Wang, Yujie Zheng, Jiandong |
Copyright Year | 2021 |
Description | Platinum’s (Pt) poisoning effect on Cu-SSZ-13 and its regeneration were investigated. The Pt enhanced the parallel reactions, such as $NH_{3}$ oxidation and NO oxidation reactions, which decreased the deNOx activities. In the temperature range below 330 °C, the deactivation of Cu-SSZ-13 by Pt poisoning was primarily caused by the overconsumption of $NH_{3}$, due to the enhanced $NH_{3}$-selective oxidation reaction, while the formation of $NO_{x}$ in $NH_{3}$ oxidation and NO oxidation into $NO_{2}$ further aggravated the degradation when the temperature was above 460 °C. The non-selective $NH_{3}$ oxidation and non-selective $NO_{x}$ catalytic reduction reactions resulted in increased $N_{2}$O formation over Pt-doped samples. The transformation of $Pt^{0}$ into $PtO_{x}$ after hydrothermal aging recovered the $deNO_{x}$ activities of the Pt-poisoned samples. |
Starting Page | 796 |
e-ISSN | 20734344 |
DOI | 10.3390/catal11070796 |
Journal | Catalysts |
Issue Number | 7 |
Volume Number | 11 |
Language | English |
Publisher | MDPI |
Publisher Date | 2021-06-29 |
Access Restriction | Open |
Subject Keyword | Catalysts Nuclear Energy and Engineering Pt Poisoning Cu-ssz-13 Nh3-scr Regeneration |
Content Type | Text |
Resource Type | Article |