Paper-structured catalyst for catalytic NOx removal from combustion exhaust gas

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

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


Platinum/aluminum oxide (Pt/Al2O3) catalyst powders were successfully fabricated to give paper-like composites using ceramic fibers by a papermaking technique. As-prepared composites, called paper-structured catalysts, possessed a fiber-network microstructure on which the Pt/Al2O3 powders were scattered. The paper-structured catalysts were subjected to a catalytic reduction process of nitrogen oxides (NOx), and demonstrated a higher performance than the original Pt/Al2O3 powders and a commercial honeycomb catalyst. A simple mixture of catalyst powders and inorganic fibers was not effective, suggesting that the characteristic porous microstructure (average pore size: ca. 20 μ m, porosity: ca. 70%) in the paper-structured catalyst possibly contributed to the efficient NOx reduction. Besides, the paper-structured catalyst exhibited a quick response in the catalytic NOx reduction at a rapidly increasing reaction temperature as compared to the honeycomb catalyst. The paper composite is flexible, lightweight and easy to handle; thus the paper-structured catalyst is expected to be a promising catalytic material for exhaust gas purification.

Original languageEnglish
Pages (from-to)208-213
Number of pages6
JournalChemical Engineering Science
Issue number1
Publication statusPublished - 2010

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering


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