Copper Ion Exchanged Silicoaluminophosphate (SAPO) as a Thermostable Catalyst for Selective Reduction of NOX with Hydrocarbons

Tatsumi Ishihara, Masaru kagawa, Fumiaki Hadama, Yusaku Takita

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)

Abstract

Selective reduction of NO with C3H6 under oxidizing atmosphere was studied over Cu-ion exchanged SAPO-n (n=5, 11, 34), β, USY, and ZSM-5. All examined Cu-ion exchanged catalyst exhibited the high activity for NO reduction with C3H6 and a large excess of 02, however, the temperature at the maximum NO conversion depends on the kind of molecular sieves. Although the maximum conversion of NO attained at a slightly higher temperature comparing with Cu-ZSM-5, Cu-SAPO-34 exhibited the highest activity for NO reduction among the examined catalysts. Furthermore, the high NO conversion was attained over a wide temperature range from 250 to 600° C. Thermal stability of SAPO-34 was extremely high and consequently, high activity to NO selective reduction on Cu-SAPO-34 was hardly decreased over 60 h at 400° C in an atmosphere containing 15 vol% H2O, and after thermal treatment at 800° C in humidified atmosphere, decreases in the activity for NO reduction was also small.

Original languageEnglish
Pages (from-to)1493-1500
Number of pages8
JournalStudies in Surface Science and Catalysis
Volume84
Issue numberC
DOIs
Publication statusPublished - Jan 1 1994
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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