HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
工学研究科  >
雑誌発表論文等  >

Preparation and screening of various multi-component catalysts for NOx conversion under lean-burn conditions : An active and heat-resistant RhPt-NaMn-Ce/Al2O3 catalyst

フルテキスト
CEJ160-1_93-98.pdf304.39 kBPDF見る/開く
この文献へのリンクには次のURLを使用してください:http://hdl.handle.net/2115/43138

タイトル: Preparation and screening of various multi-component catalysts for NOx conversion under lean-burn conditions : An active and heat-resistant RhPt-NaMn-Ce/Al2O3 catalyst
著者: Kaneeda, M. 著作を一覧する
Iizuka, H. 著作を一覧する
Hiratsuka, T. 著作を一覧する
Shinotsuka, N. 著作を一覧する
Kitahara, Y. 著作を一覧する
Arai, M. 著作を一覧する
キーワード: NOx conversion
Lean NOx trap catalyst
Thermal stability
Additive effects
発行日: 2010年 5月15日
出版者: Elsevier B.V.
誌名: Chemical Engineering Journal
巻: 160
号: 1
開始ページ: 93
終了ページ: 98
出版社 DOI: 10.1016/j.cej.2010.03.014
抄録: The present work has been undertaken to improve the thermal stability of an RhPt-NaTi/Al2O3 catalyst, which is one of promising lean NOx trap catalysts for practical NOx conversion. For this purpose, we mainly directed our attention to the component of Na that acts as NOx trapping sites and intended to improve the thermal stability of this Na species by using various additives. After screening of various RhPt-Naα/Al2O3 (α = Ti, Si, Mg, Ca, Mn, Co, Ni, La, and Nd) catalysts, Mn addition was found to be effective for improving thermal stability of the catalyst. Moreover, the modification of Al2O3 support with Ce additive was indicated to be effective, and the most active and thermally stable catalyst was RhPt-NaMn-Ce/Al2O3, which was able to function actively even after a severe heat treatment at 800℃. The reasons for the high thermal stability of this catalyst were examined by evaluating NO oxidation activity of a model catalyst including Mn and characterizing features of the RhPt-NaMn-Ce/Al2O3 catalyst with FTIR of adsorbed NO and chemisorption of CO and CO2. An important factor is that the addition of Mn prevents the Na species from undesired sintering during heat treatments, resulting in a larger surface area of exposed Na species, namely NOx trapping sites. This catalyst can also function in a commercial vehicle engine under lean-burn conditions and should be a promising catalyst for practical use.
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/43138
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 荒井 正彦

 

本サイトに関するご意見・お問い合わせは repo at lib.hokudai.ac.jp へお願いします。 - 北海道大学