Preparation of Alumite Support and Preliminary Activity Investigation for NO Removal in SCR-HC over Alumite Catalyst
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概要
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A novel metallic monolith support was prepared by anodization, HWT (hot water treatment) and calcination. A commercial aluminum plate was anodized to form porous alumina films in the outer surfaces of the aluminum plate. In contrast to the anhydrous and amorphous alumina formed after anodization, the alumina in the anodized film with HWT was boehmite. The calcination after HWT made the boehmite film lose its hydrate water and rearrange into γ-alumina. The HWT and calcination significantly enhanced the surface area of the support due to the formation of numerous micropores (radius <25 Å). These new micropores were superimposed on the original skeleton structure to make up a binary-pore structure.The activities of Cu-Mn-CeOx/Al2O3/Al and Pt/Al2O3/Al alumite catalysts for the SCR-HC of NO by propene were investigated under oxygen-rich conditions. At low temperatures, Pt/Al2O3/Al exhibited a higher activity for NOx removal than Cu-Mn-CeOx/Al2O3/Al. However, a higher temperature (>623 K) made the activity of Pt/Al2O3/Al inferior to that of Cu-Mn-CeOx/Al2O3/Al. In comparison with Pt/Al2O3/Al, Cu-Mn-CeOx/Al2O3/Al had a lower N2O selectivity throughout the whole temperature range. The addition of SO2 inhibited the activity of Pt/Al2O3/Al, and this activity decay was reversible. On the other hand, a dramatic promotional effect of SO2 on reducing NOx was observed over Cu-Mn-CeOx/Al2O3/Al, but this influence of SO2 on the activity was irreversible.
- 2003-12-01
著者
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亀山 秀雄
東京農工大学
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SAKURAI Makoto
Department of Chemical Engineering, Tokyo University of Agriculture and Technology
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KAMEYAMA Hideo
Department of Chemical Engineering, Tokyo University of Agriculture and Technology
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Guo Yu
Department of Chemical Engineering, Faculty of Engineering, Tokyo University of Agriculture and Tech
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Kameyama Hideo
Department Of Chemical Engineering Faculty Of Engineering Tokyo University Of Agriculture And Techno
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MATSUYAMA Akira
Lead Industry Company, Ltd.
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KUDOH Yasushi
Lead Industry Company, Ltd.
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Kudoh Yasushi
Lead Industry Co. Ltd.
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Sakurai Makoto
Department Of Cardiovascular Surgery Osaka Medical Center For Cancer And Cardiovascular Diseases
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Sakurai M
Department Of Chemical Engineering Faculty Of Engineering Tokyo University Of Agriculture And Techno
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Guo Yu
Department Of Chemical Engineering Faculty Of Engineering Tokyo University Of Agriculture And Techno
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Matsuyama A
Lead Industry Company Ltd.
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Sakurai Makoto
Department Of Applied Chemistry College Of Engineering Chubu University
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MATSUYAMA Akira
Lead Industry Company Ltd.
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