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Preparation of apatite-type-silicate-supported precious metal catalysts for selective catalytic reduction of NOx

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Abstract

Apatite-type silicate supported precious metal catalysts were prepared and investigated for their catalytic activity in selective catalytic NO reduction. Single-phase La9.33Si6O26 and La8.33ASi6O25.5 (A=Ca, Sr, Ba) were obtained by a sol-gel method. Pd/La9.33Si6O26 catalyst exhibited high activity for oxidation of C3H6, comparable to Pd/Al2O3 catalyst, although the specific surface area of La9.33Si6O26 was lower than that of Al2O3. In addition, Pt/La9.33Si6O26 catalyst exhibited higher activity for selective catalytic reduction of NO than Pt/Al2O3 catalyst. Substitution of Ba2+ for La3+ of La9.33Si6O26 led to increased catalytic activity at low temperature.

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Authors and Affiliations

  1. Department of Materials-Process Engineering and Applied Chemistry for Environments, Faculty of Engineering and Resource Science, Akita University, 1-1 Tegatagakuen-machi, 010-8502, Akita, Japan

    Sumio Kato, Takuya Yoshizawa, Nobuhiro Kakuta, Shinya Akiyama, Masataka Ogasawara & Shinichi Nakata

  2. Catalysts Division, Mitsui Mining & Smelting Co., Ltd., 1333-2 Haraichi, Ageo, 362-0021, Saitama, Japan

    Takashi Wakabayashi & Yuunosuke Nakahara

Authors
  1. Sumio Kato
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  2. Takuya Yoshizawa
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  3. Nobuhiro Kakuta
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  4. Shinya Akiyama
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  5. Masataka Ogasawara
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  6. Takashi Wakabayashi
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  7. Yuunosuke Nakahara
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  8. Shinichi Nakata
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Correspondence to Sumio Kato.

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Kato, S., Yoshizawa, T., Kakuta, N. et al. Preparation of apatite-type-silicate-supported precious metal catalysts for selective catalytic reduction of NOx . Res. Chem. Intermed. 34, 703–708 (2008). https://doi.org/10.1007/BF03036928

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  • DOI: https://doi.org/10.1007/BF03036928

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