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  • 1
    Digitale Medien
    Digitale Medien
    Role of organic nitro compounds in selective reduction of NOx with ethanol over different supported silver catalysts (1998)
    Springer
    Catalysis letters 51 (1998), S. 11-14 
    Details
    ISSN: 1572-879X
    Schlagwort(e): selective reduction of NOx ; supported silver catalyst ; support effect ; nitromethane ; nitroethane
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract The adsorption of organic nitro compounds such as nitromethane and nitroethane on different supported silver catalysts (Ag/Al2O3, Ag/TiO2, Ag/SiO2) has been studied using infrared spectroscopy. The adsorbed NCO species formation was strongly influenced by the catalyst support and therefore clearly detected on Ag/Al2O3 and Ag/TiO2 catalysts by thermal decomposition of nitromethane and nitroethane at temperatures higher than 150°C. With the Ag/SiO2 catalyst, very little NCO formation was observed at 350°C. On the other hand, the catalyst support was found to affect the N2 formation in the selective reduction of NOx on supported silver catalysts. On the basis of these findings, the role of adsorbed nitromethane, nitroethane and isocyanate species in the selective reduction of NOx is discussed with respect to the catalyst support effect and the catalytic activity.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1019041118880
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  • 2
    Digitale Medien
    Digitale Medien
    Reactivity of surface isocyanate species with NO, O2 and NO+O2 in selective reduction of NOχ over Ag/Al2O3 and Al2O3 catalysts (1998)
    Springer
    Catalysis letters 55 (1998), S. 211-215 
    Details
    ISSN: 1572-879X
    Schlagwort(e): isocyanate ; reactivity ; selective reduction of NOχ ; Ag/Al2O3 ; Al2O3
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Reactivity of surface isocyanate (NCO(a)) species with NO, O2 and NO+O2 in selective reduction of NOχ over Ag/Al2O3 and Al2O3 catalysts was studied by a pulse reaction technique and an in situ diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy. The NCO(a) species on Ag/Al2O3 reacted with O2 or NO+O2 mixture gas to produce N2 effectively above 200°C, while the reaction of NCO(a) with NO hardly produced N2 even at 350°C. In the case of Al2O3 alone, less N2 was detected in the reaction of NCO(a) with NO+O2, indicating that silver plays an important role in the N2 formation from NCO(a). These behaviors of the reactivity of NCO(a) species with reactant gases were in good agreement with the changes in NCO(a) bands shown by in situ DRIFT measurements. Based on these findings, the role of NCO(a) species in the selective reduction of NOχ on Ag/Al2O3 and Al2O3 catalysts is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1023/A:1019043214646
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  • 3
    Digitale Medien
    Digitale Medien
    Catalytic Properties of Ni〈sub〉3〈/sub〉Al for Hydrogen Production Reactions (2005)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 475-479 (Jan. 2005), p. 755-758 
    Details
    ISSN: 1662-9752
    Quelle: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Thema: Maschinenbau
    Notizen: Ni3Al has attractive high temperature properties, such as high strength and goodoxidation/corrosion resistance, and is possible to be used for high temperature chemical processing and manufacture. Until now, the catalytic properties of Ni3Al were rarely investigated since the leaching of aluminum from Ni3Al is difficult to obtain a porous Raney-Ni compared to NiAl3 and Ni2Al3. In the present work, the catalytic properties of Ni3Al were examined for hydrogen production reactions from methanol. It was found that alkali-leached Ni3Al showed high activity for methanol decomposition (CH3OH→ 2H2+CO). Furthermore, Ni3Al catalysts suppress the formation of methane, i.e. they show higher selectivity for the methanol decomposition reaction than Ni catalyst. These results indicate a possibility for Ni3Al used as a catalyst for hydrogen production reaction
    Materialart: Digitale Medien
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/09/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.475-479.755.pdf
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