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ID 17045
本文ファイル
著者
Miyata, Takeshi
Shiraga, Masato
Li, Dalin
Atake, Ikuo
Shishido, Tetsuya
Oumi, Yasunori
キーワード
CH4 reforming
H2 production
DSS operation
Ni/Mg(Al)O catalyst
Ru addition
memory effect.
NDC
化学
抄録(英)
Effects of Ru addition on the activity and the sustainability of Ni/Mg(Al)O catalysts were investigated in the daily start-up and shut-down (DSS) operation of the steam reforming of CH4. Mg2.5(Ni0.5)-Al hydrotalcite was prepared by coprecipitation and calcined to form Mg2.5(Al,Ni0.5)O periclase. When the powders of the periclase were dipped in an aqueous solution of Ru(III) nitrate, the hydrotaclite was reconstituted on the surface of Mg2.5(Al,Ni0.5)O particles, resulting in the formation of highly dispersed Ru/Ni bimetal supported catalysts after the calcination, followed by the reduction. The addition of Ru on Ni caused a decrease in the reduction temperature of Ni and an increase in the amount of H2 uptake on the Ni over the catalyst. Formation of Ru-Ni alloy or strong interaction between Ru and Ni was also suggested. When Ru-Ni0.5/Mg2.5(Al)O catalysts were tested in the DSS-like operation under steam purging, the deactivation due to the oxidation of Ni metal by steam was effectively suppressed by hydrogen spillover. Moreover, only 0.05 wt0f Ru loading was enough to effectively suppress the deactivation during the DSS-like operation.
掲載誌名
Catalysis Communications
8巻
3号
開始ページ
447
終了ページ
451
出版年月日
2007-03
出版者
Elsevier
ISSN
1566-7367
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2007 Elsevier Ltd.
関連情報URL(IsVersionOf)
http://dx.doi.org/10.1016/j.catcom.2006.07.018
部局名
工学研究科