ID | 112187 |
著者 |
Tsuchiya, Yuto
Tokushima University
Gasmalla, Rayan Hamid Elbakhit
Tokushima University
Arai, Yuka
Nippon Pillar Packing Co., Ltd.
Akamatsu, Masamori
Nippon Pillar Packing Co., Ltd.
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キーワード | Si/SiC ceramic filter
Reductive decomposition
Nitrite
Palladium
Char intermediate
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資料タイプ |
学術雑誌論文
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抄録 | A Si/SiC ceramic filter was used to support a structural palladium catalyst in a continuous fixed-bed flow reactor during a reductive decomposition of nitrite. A previous report described the use of non-porous alumina spheres coated with Pd/C, a carbon monolith impregnated with Pd or a structural catalyst consisting of a polyurethane sponge skeleton impregnated with Pd resulted either in negligible activity or a complete stoppage of the flow by increasing the pressure drop in the flow system. The use of a Si/SiC filter impregnated with palladium, however, overcame the demerits and resulted in an 11% conversion of nitrite in 60 min. The use of a Si/SiC filter coated with a char intermediate followed by impregnation with Pd (Pd/C/Si/SiC) resulted in a structural catalyst that enhanced the activity to yield a 33% conversion of nitrite in 60 min. When five Pd/C/Si/SiC structural catalysts were used, however, the complete decomposition was achieved in the same amount of time. Although improvement was previously observed by using an alumina intermediate, use of the char intermediate resulted in a new factor for activity improvement. The characterization results show that it was the affinity between aqueous nitrite and the intermediate rather than palladium dispersion that contributed the most to the improvement of activity.
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掲載誌名 |
Journal of the Ceramic Society of Japan
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ISSN | 13486535
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出版者 | The Ceramic Society of Japan
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巻 | 126
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号 | 9
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開始ページ | 714
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終了ページ | 718
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発行日 | 2018-09-01
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権利情報 | This article is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.
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言語 |
eng
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著者版フラグ |
出版社版
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部局 |
理工学系
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