Effect of chemical and physical properties of titanium oxide support surface during nitrogen monoxide reduction by carbon monoxide in presence water over titanium oxide supported platinum catalyst

Keisuke Kobayashi, Shotaro Ogawa, Hideyuki Matsumoto, Keigo Matsuda, Tetsuya Nanba

Research output: Contribution to journalArticle

Abstract

The selective conversion of NOx to NH3 through the NO – CO - H2O reaction over Pt/TiO2 catalysts was investigated to develop a method for utilizing reactive nitrogen species emitted from combustion processes as raw materials for the synthesis of useful compounds. High NH3 selectivity was achieved for high-specific-surface-area catalysts. Catalytic activity tests showed that the activities of catalysts depended on the crystal structure of the support. Comparing CO conversion between NO – CO - H2O reaction and CO - H2O reaction, which could play a role of H-supply reaction, Pt/TiO3 demonstrated higher CO conversion for the NO – CO - H3O reaction than that for CO - H2O reaction except for high-surface-area anatase TiO2-supported catalyst around 200°C. Temperature-programmed desorption of CO2 revealed that the CO3 formed during the NO – CO - H2O reaction had no effect on the difference in activity. Carbonaceous surface species and NHx species were observed on the surface of Pt/TiO2 catalyst during NO – CO - H2O reaction by diffused reflectance infrared Fourier transform spectroscopy. The difference in formate formation on anatase-TiO2 supported Pt catalyst was confirmed compared to rutile-TiO2 supported Pt catalyst.

Original languageEnglish
Pages (from-to)28-37
Number of pages10
JournalJournal of The Japan Petroleum Institute
Volume63
Issue number1
DOIs
Publication statusPublished - 2020
Externally publishedYes

Keywords

  • Ammonia
  • Nitrogen oxide
  • Platinum catalyst
  • Titanium oxide support

ASJC Scopus subject areas

  • Fuel Technology
  • Energy Engineering and Power Technology

Fingerprint Dive into the research topics of 'Effect of chemical and physical properties of titanium oxide support surface during nitrogen monoxide reduction by carbon monoxide in presence water over titanium oxide supported platinum catalyst'. Together they form a unique fingerprint.

  • Cite this