Oxidation of ammonia to nitrogen over Pt/Fe/ZSM5 catalyst: Influence of catalyst support on the low temperature activity

Min Sung Kim, Dae Won Lee, Sang Ho Chung, Yoon Ki Hong, Seong Ho Lee, Seong Hoon Oh, Il Hyoung Cho, Kwan Young Lee

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

In this study, Pt/Fe/ZSM5 catalysts were applied to oxidation of ammonia, where the catalysts showed good low-temperature activity (≤200°C) for converting ammonia into nitrogen. With 1.5% Pt/0.5% Fe/ZSM5 catalyst, we could obtain 81% NH3 conversion and 93% N2 selectivity at 175°C at the short contact-time of w/f=0.00012gmin/mL. Through the characterization studies using high-resolution transmission electron microscopy (HRTEM) and X-ray spectroscopies (XRD, XPS), we could find that the active species was collaborating Pt/Fe species, which structure and activity were largely influenced by support material - in a positive way by ZSM5, rather than by Al2O3 and SiO2. When using ZSM5 as the support material, Pt was highly dispersed exclusively on the Fe oxide, and the valence state and dispersion of Pt changed according to Fe loading amount.

Original languageEnglish
Pages (from-to)153-160
Number of pages8
JournalJournal of Hazardous Materials
Volume237-238
DOIs
Publication statusPublished - 2012 Oct 30

    Fingerprint

Keywords

  • Ammonia oxidation
  • HRTEM
  • Pt dispersion
  • Pt/Fe/ZSM5
  • XPS

ASJC Scopus subject areas

  • Health, Toxicology and Mutagenesis
  • Pollution
  • Waste Management and Disposal
  • Environmental Chemistry
  • Environmental Engineering

Cite this