NOX reduction over paper-structured fiber composites impregnated with Pt/Al2O3 catalyst for exhaust gas purification

Hirotaka Koga, Hirotake Ishihara, Takuya Kitaoka, Akihiko Tomoda, Ryo Suzuki, Hiroyuki Wariishi

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Abstract

Pt/Al2O3 catalyst powder was successfully incorporated in a microstructured paper-like matrix composed of a ceramic fiber network, by use of a simple papermaking technique. As-prepared composite, denoted paper-structured catalyst, was applied to the reduction of nitrogen oxide (NOX) in the presence of propene, for exhaust gas purification. The paper-structured catalyst demonstrated higher NOX reduction efficiency and more rapid thermal responsiveness than a conventional Pt-loaded honeycomb catalyst, indicating that the paper-like structure with interconnected pore spaces contributes to effective transport of heat and reactants to the catalyst surfaces. Furthermore, the paper-structured catalyst with the appearance of flexible paperboard has a high degree of utility. The efficiency of utilization of Pt catalyst was improved by using hierarchically assembled paper-structured catalysts with preferential location of Pt catalyst in the upper part. The paper-structured catalyst composite with paper-like utility and porous microstructure is thought to be a promising catalytic material for efficient NOX gas purification.

Original languageEnglish
Pages (from-to)4151-4157
Number of pages7
JournalJournal of Materials Science
Volume45
Issue number15
DOIs
Publication statusPublished - Aug 1 2010

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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