Preparation of apatite-type-silicate-supported precious metal catalysts for selective catalytic reduction of NOx
Authors: Kato, Sumio1; Yoshizawa, Takuya1; Kakuta, Nobuhiro1; Akiyama, Shinya1; Ogasawara, Masataka1; Wakabayashi, Takashi2; Nakahara, Yuunosuke2; Nakata, Shinichi1
Source: Research on Chemical Intermediates, Volume 34, Numbers 8-9, 2008 , pp. 703-708(6)
Publisher: VSP, an imprint of Brill
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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.Keywords: APATITE-TYPE SILICATE; PRECIOUS METAL; NO REDUCTION
Document Type: Research article
DOI: 10.1163/156856708786189410
Affiliations: 1: Department of Materials-Process Engineering and Applied Chemistry for Environments, Faculty of Engineering and Resource Science, Akita University, 1-1 Tegatagakuen-machi, Akita, 010-8502, Japan 2: Catalysts Division, Mitsui Mining & Smelting Co., Ltd., 1333-2 Haraichi, Ageo, Saitama, 362-0021, Japan
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