Designing of a structured catalyst for O2 selective recovery by hydrogen in the presence of NO
Abstract
The influence of promoter (Pd), modifying additives of rare earth oxides (La2O3, CeO2) and transient (NiO, CuO) metals on the activity of the Co3O4/kordierit catalyst in O2 and NO recovery by hydrogen is studied. It is shown that the adding of Pd and the rare-earth oxides in the cobalt oxide catalyst increases its activity in the reaction H2 + 1/2O2 → H2O, 2H2 + 2NO → N2 + 2H2O and selectivity in the oxygen recovery with hydrogen in the presence of NO. Such a phenomenon can be caused by decrease in bonding strength of oxygen with a surface and formation of low-temperature form of oxygen which is non-typical for unpromoted cobalt-oxide catalyst. Structured Pd- Co3O4–La2O3/cordierite catalyst, which surpasses the commercial granulated silver-manganese one (used in purification of technological gases of production of hydroxylaminesulphate from impurity of oxygen) with reference to activity and selectivity (in the course of oxygen reduction in the presence of nitric oxide) as well as thermal stability, is developed.
About the Authors
S. A. Soloviev
L.V. Pisarzhevsky Institute of Physical Chemistry of the National Academy of Sciences of Ukraine, Kyiv
Ukraine
Ukraine
P. I. Kiriyenko
L.V. Pisarzhevsky Institute of Physical Chemistry of the National Academy of Sciences of Ukraine, Kyiv
Ukraine
Ukraine
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Review
For citations:
Soloviev S.A., Kiriyenko P.I. Designing of a structured catalyst for O2 selective recovery by hydrogen in the presence of NO. Kataliz v promyshlennosti. 2010;(4):13-20. (In Russ.)
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