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Catalytic decomposition of nitrous oxide?

  1. Apr 30, 2006 #1
    Does anyone know what types of materials may be used to decrease the activation energy of 2N_2O->2N_2 +O_2. I think perhaps silver may work, but I need to find a material which will withstand the high temperature of decomposition

  2. jcsd
  3. Apr 30, 2006 #2


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    Staff: Mentor

    Platinum, palladium and rhodium are two metals that serve as catalysts converting NOx to nitrogen and oxygen.




    Other references:


  4. May 10, 2006 #3
    Do you know the melting point of any of these catalysts? The decomposition of NOX can serve as a gas generator, creating oxygen and nitrogen, and can thermally sustain itself in the presence of a catalyst with relatively little activation energy. I would like to find a way to cost effectively decompose NOX into its constituants in an adiabatic reaction for the purposes of 1) heating and expanding the flow, and 2) creating free oxygen. I knew of the precious metal approach, but it seems a bit fiscally difficult. Also, I may be mistaken but I believe N2O is not a major byproduct of car emmissions such as NO or NO2 and various other oxygen rich nitrogen oxides.
  5. May 10, 2006 #4


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    Staff: Mentor

    Melting temperatures for the elements can be found at www.webelements.com

    Rh is in the same group as Co.

    Co, 1768 K [or 1495 °C (2723 °F)]
    Rh, 2237K [or 1964 °C (3567 °F)]

    Pd and Pt are in the Ni group.

    Ni, 1728 K [or 1455 °C (2651 °F)]
    Pd, 1828.05 K [or 1554.9 °C (2830.82 °F)]
    Pt, 2041.4 K [or 1768.3 °C (3214.9 °F)]

    Cu, 1357.77 K [or 1084.62 °C (1984.32 °F)]

    Co and Cu are used in Fischer-Tropsch synthesis in which H2 and CO are combined to form alkanes or alkenes.

    BTW, NOx generally refers to NO and NO2.
    Last edited: May 10, 2006
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