Deactivation of Pd/Zeolites passive NOx adsorber induced by NO and H2O: Comparative study of Pd/ZSM-5 and Pd/SSZ-13

Jaeha Lee, Yongwoo Kim, Sungha Hwang, Eunwon Lee, Hyokyoung Lee, Chang Hwan Kim, Do Heui Kim

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Atomically dispersed Pd in Zeolites can adsorb NO to reduce NOx emission from vehicle exhausts at low temperature. In this contribution, low temperature NO adsorption abilities of Pd/ZSM-5 and Pd/SSZ-13 are comparatively studied. Co-adsorption of NO and H2O on Pd/ZSM-5 induced PdO sintering and deactivated NO adsorption ability. On the other hand, NO adsorption ability of Pd/SSZ-13 was maintained from the 500 °C treatment under NO and H2O where PdO sintering did not occur. Therefore, Pd/SSZ-13 would be the better candidate as NO storage material to reduce NOx emission from vehicle exhaust.

Original languageEnglish
Pages (from-to)350-355
Number of pages6
JournalCatalysis Today
Volume360
DOIs
StatePublished - 15 Jan 2021

Keywords

  • Deactivation
  • HO
  • Low-temperature NO adsorption
  • Pd/SSZ-13
  • Pd/ZSM-5

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