Development and mechanism study of silver cluster catalysts for NOx reduction by urea

• Project/Area Number: 19760543
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Catalyst/Resource chemical process
• Research Institution: Nagoya University
• Principal Investigator: KEN-ICHI Shimizu Nagoya University, 大学院・工学研究科, 助教 (60324000)
• Project Period (FY): 2007 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥3,660,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥360,000); Fiscal Year 2009: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2008: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2007: ¥2,100,000 (Direct Cost: ¥2,100,000)
• Keywords: 尿素脱硝法 / 固体酸触媒 / ディーゼル自動車 / クラスター / 反応機構 / 紫外可視分光 / 赤外分光 / 環境触媒 / X線吸収スペクトル / ディーゼル自動車排ガス / 触媒劣化 / 貴金属

Research Abstract

Improvement of catalytic activity for reduction of nitrogen oxides (NOx) by urea as useful method of NO_x removal from diesel exhausts. This study showed that addition of H_2 in the selective catalytic reduction of NO by urea caused an drastic improvement of catalytic activity of silver-alumina. The mechanism and structure of active species in the present reaction system were studied by kinetic and spectroscopic studies. Ag clusters formed via H_2 addition are shown to be the reactive species.

Research Products

• [Journal Article] Study of active sites and mechanism for soot oxidation by silver-loaded ceria catalyst (2010)
  • Author(s): Ken-ichi Shimizu*, Hiroshi Kawachi, Atsushi Satsuma
  • Journal Title: Appl. Catal. B (in press)
  • Peer Reviewed
• [Journal Article] Study of active sites and mechanism for soot oxidation by silver-loaded ceria catalyst (2010)
  • Author(s): Ken-ichi Shimizu, Hiroshi Kawachi, Atsushi Satsuma
  • Journal Title: Appl.Catal.B (印刷中)
  • Peer Reviewed
• [Journal Article] NOx吸蔵還元触媒の反応機構と性能制御因子 (2009)
  • Author(s): 清水研一, 齋藤良典, 薩摩篤
  • Journal Title: 触媒 51 Pages: 57-62
  • NAID: 10023985463
• [Journal Article] Effect of supports on formation and reduction rate of stored nitrates on NSR catalysts as investigated by in situ FT/IR (2008)
  • Author(s): Ken-ichi Shimizu, Yoshinori Saito, Takeshi Nobukawa, Naoto Miyoshi, Atsushi Satsuma*
  • Journal Title: Catalysis Today 139 Pages: 24-28
  • Peer Reviewed
• [Journal Article] Characterization of Lewis acidity of cation-exchanged montmorillonite K-10 clay as effective heterogeneous catalyst for acetylation of alcohol (2008)
  • Author(s): Ken-ichi Shimizu, Tomoya Higuchi, Emi Takasugi, Tsuyoshi Hatamachi, Tatsuya Kodama and Atsushi Satsuma
  • Journal Title: J. Mol. Catal. A : Chemical 284 Pages: 89-96
  • Peer Reviewed
• [Journal Article] Effect of Supports on Formation and Reduction Rate of Stored Nitrates on NSR Catalysts as Investigated by in-situ FT/IR (2008)
  • Author(s): Ken-ichi Shimizu, Yoshinori Saito, Takeshi Nobukawa, Naoto Miyoshi, Atsushi Satsuma
  • Journal Title: Catal. Today 139 Pages: 24-28
  • Peer Reviewed
• [Journal Article] Hydrogen assisted urea-SCR and NH3-SCR with silver-alumina as highly active and SO2-tolerant de-NOx catalysis (2007)
  • Author(s): Ken-ichi Shimizu*, Atsushi Satsuma
  • Journal Title: Appl. Catal. B 77 Pages: 222-225
  • Peer Reviewed
• [Journal Article] Hydrogen assisted urea-SCR and NH3-SCR with silver-alumina as highly active and SO2-tolerant de-NOx catalysis (2007)
  • Author(s): K. Shimizu, A. Satsuma
  • Journal Title: Appl. Catal. B 77 Pages: 222-225
  • Peer Reviewed
• [Presentation] 銀粉-酸化スズ混合触媒によるカーボン燃焼 (2010)
  • Author(s): 清水研一, 川地浩史, 薩摩篤
  • Organizer: 第105回触媒討論会
  • Place of Presentation: 京都テルサ
  • Year and Date: 2010-03-24
• [Presentation] Catalytic Diesel Soot Oxidation over Ag/CeO2 (2009)
  • Author(s): Nagoya, Japan, Hiroshi Kawachi, Kenichi Shimizu, Atsushi Satsuma
  • Organizer: The 4th Japan-China Workshop on Environmental Catalysis and Eco-Materials
  • Place of Presentation: Nagoya, Japan
  • Year and Date: 2009-11-05
• [Presentation] Catalytic Diesel Soot Oxidation Over Ag/CeO_2 (2009)
  • Author(s): Hiroshi Kawachi, Kenichi Shimizu, Atsushi Satsuma
  • Organizer: The 4th Japan-China Workshop on Environmental Catalysis and Eco-Materials
  • Place of Presentation: Nagoya, Japan名古屋大学
  • Year and Date: 2009-11-05
• [Presentation] 銀アルミナ触媒によるNOx選択還元、アルコール脱水素、酸化・還元的C-Cカップリング (2009)
  • Author(s): 清水研一
  • Organizer: 平成20年度高難度選択酸化反応研究会ワークショップ
  • Place of Presentation: 神奈川県・宇部興産葉山寮
  • Year and Date: 2009-01-30
• [Presentation] 銀クラスター触媒を用いた自動車排ガス浄化と環境調和型有機合成5th International Conference on Environmental Catalysis (2008)
  • Author(s): 清水研一
  • Organizer: 触媒学会北海道地区札幌講演会, 清水研一
  • Place of Presentation: 北海道大学創成科学研究棟
  • Year and Date: 2008-12-10
• [Presentation] アルミナ系NOx還元触媒の開発と作用機構の解明 (2008)
  • Author(s): 清水研一
  • Organizer: 石油学会関西地区シンポジウム
  • Place of Presentation: キャンパスプラザ京都
  • Year and Date: 2008-03-05
• [Presentation] Hydrogen Effect on Urea-SCR by Ag/Al2O3: Practical and Mechanistic Aspects (2008)
  • Author(s): K. Shimizu, A. Satsuma
  • Organizer: 5th International Conference on Environmental Catalysis
  • Place of Presentation: Belfast, UK
• [Presentation] Hydrogen Effect on Urea-SCR by Ag/Al 2 O 3 : Practical and Mechanistic Aspects (2008)
  • Author(s): K. Shimizu and A. Satsuma
  • Organizer: 5 th International Conference on Environmental Catalysis
  • Place of Presentation: Belfast, UK
• [Presentation] 2A05水素添加による銀アルミナ触媒の脱硝活性向上と作用機構 (2007)
  • Author(s): 清水研一
  • Organizer: 日本セラミックス協会第20回秋季シンポジウム
  • Place of Presentation: 名古屋工業大学
  • Year and Date: 2007-09-12
• [Presentation] 水素添加による銀アルミナ触媒の脱硝活性向上と作用機構 (2007)
  • Author(s): 清水 研一
  • Organizer: 日本セラミックス協会 第20回秋季シンポジウム
  • Place of Presentation: 名古屋工業大学、名古屋
  • Year and Date: 2007-09-12
• [Presentation] 新規金属酸化物系NOx除去触媒の開発と作用機構の解明 (2007)
  • Author(s): 清水研一
  • Organizer: 平成19年石油学会奨励賞受賞講演
  • Place of Presentation: アルカディア市ヶ谷
  • Year and Date: 2007-05-18
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  • URL: http://www.apchem.nagoya-u.ac.jp/06-BS-6/satsumaken/index.html
• [Remarks]
  • URL: http://www.apchem.nagoya-u.ac.jp/06-BS-6/satsumaken/index.html
• [Remarks]
  • URL: http://www.apchem.nagoya-u.ac.jp/06-BS-6/satsumaken/index.html
• [Remarks]
  • URL: http://www.apchem.nagoya-u.ac.jp/06-BS-6/satsumaken/index.html