Effect of preparation methods on NOx removal ability by sorption in Pt-ZrO2-Al2O3

Suzue Kikuyama, Izumi Matsukuma, Ryuji Kikuchi, Kazunari Sasaki, Koichi Eguchi

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10 Citations (Scopus)

Abstract

Heterogeneous porous materials of Pt-ZrO2-Al2O3 are prepared via three different procedures based on impregnation and/or ammonia precipitation to examine their ability for NOx removal by sorption. In case a sample was prepared via ammonia precipitation, the sample exhibited both a larger BET surface area and a higher NO removal ability than a sample prepared only via impregnation. The experimental results indicate that a high-temperature calcination is essential to remove residual Cl from Pt-ZrO2-Al2O3 prepared from H2PtCl6 in order to provide more active NOx sorption sites. This suggestion was supported by the experimental results: (1) the sample prepared using H2PtCl6 as a Pt source should be calcined at a higher temperature after the Pt source was added in order to exhibit a higher sorption ability, and (2) the use of Cl-free Pt sources enhanced the NOx sorptio n capacity even after calcination at a lower temperature.

Original languageEnglish
Pages (from-to)107-116
Number of pages10
JournalApplied Catalysis A: General
Volume219
Issue number1-2
DOIs
Publication statusPublished - Oct 5 2001

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Process Chemistry and Technology

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