Počet záznamů: 1  

Analysis of the Structural Parameters Controlling the Temperature Window of the Process of SCR-NOx by Low Paraffins over Metal-Exchanged Zeolites

  1. 1.
    0181431 - UFCH-W 20020097 RIV NL eng J - Článek v odborném periodiku
    Sobalík, Zdeněk - Vondrová, Alena - Tvarůžková, Zdenka - Wichterlová, Blanka
    Analysis of the Structural Parameters Controlling the Temperature Window of the Process of SCR-NOx by Low Paraffins over Metal-Exchanged Zeolites.
    Catalysis Today. Roč. 75, - (2002), s. 347-351. ISSN 0920-5861. E-ISSN 1873-4308
    Grant CEP: GA AV ČR IBS4040016; GA MŠMT OC D15.20
    Výzkumný záměr: CEZ:AV0Z4040901
    Klíčová slova: catalytic activity * metal-exchanged zeolites * nitrogen oxides
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 2.146, rok: 2002

    Catalytic activity of H- and FeH-ferrierite (FER) zeolites with iron content from 50 to 4000 ppm in NO-NO2 equilibration and SCR of NOx by propane was measured, both in NO2-poor and NO2-rich streams. The activity of FeH-FER in SCR in NO2-poor streams depends strongly on the Fe content; this relationship is valid down to traces of iron, while no such correlation was indicated in NO2-rich streams. This was rationalized by realizing the negligible activity of zeolite protons for NO-NO2 equilibration. Accordingly the SCR activity of H-FER in NO2-poor streams necessitates presence of iron traces. In the NO2-O-2-propane mixtures a process in absence of zeolite catalyst initiating propane oxidation and NO2 --> NO conversion, but without N-2 formation, was evidenced at temperatures over 350 C. It is suggested that such a radical process participate in characteristic narrow temperature window for NOx reduction by propane.
    Trvalý link: http://hdl.handle.net/11104/0078003

     
     

Počet záznamů: 1  

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