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Effect of water vapor over Pd-Co/SZ catalyst for the NO selective reduction by methane

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2005-06
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Quincoces, C. E.
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Effect of water vapor over Pd-Co/SZ catalyst for the NO selective reduction by methane
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  • Quincoces, C. E.;
  • Guerrero, Sichem;
  • Araya Figueroa, Paulo;
  • González, M. G.;
Abstract
he selective catalytic reduction (SCR) of NO by CH4 in the presence of excess 02 has been studied on Pd-Co, Pd and Co catalysts supported on sulfated zirconia (SZ) and activated in reaction mixture at 700 degreesC. After the addition of Co on Pd/SZ, an promoting effect on the catalytic activity was achieved, especially on 0.2%Pd-2%Co/SZ, which showed the maximum NO conversion higher 60% at 500 degreesC and 3 1,000 h(-1). The bimetallic catalyst presented practical activity in the presence of water vapor. Stable NO, conversion was obtained for over 50 h in the presence of 6% water vapor. In order to correlate the catalysts composition with their activity, they were characterized by X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS) and temperature programmed reduction (TPR) techniques.
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URI: https://repositorio.uchile.cl/handle/2250/124653
ISSN: 1566-7367
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