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Title: Zeolite supported iron catalyst for nitric oxide reduction by ammonia in the presence of oxygen
Authors: Salker, A V
Keywords: NO<sub>x</sub> reduction
iron catalyst
Issue Date: Sep-2004
Publisher: CSIR
Series/Report no.: C01 B 21/24, BOI J 29/064
Abstract: Iron based H-ZSM-5 catalysts were used to study NO reduction with NH<sub>3</sub> in the presence of oxygen with and without humid conditions. The iron based H-ZSM-5 was prepared by wet impregnation method and characterized by X-ray diffraction technique, BET surface area and SEM. TPD experiments showed low and high temperature NH<sub>3</sub> desorption peaks. FTIR indicated only ammonia adsorbed species. Fe/ZSM-5 showed better NO<sub>x</sub> reduction with NH<sub>3</sub> than H-ZSM-5 which was a poor catalyst for the NO<sub>x</sub> reduction. The catalytic activity did not show significant difference in the NO<sub>x</sub> conversion with and without water, but there was significant difference in NH<sub>3</sub> conversion. It may be said that the dispersed Fe species and acid sites were the active centers for the reduction of NO with NH<sub>3</sub> in the presence of oxygen.
Description: 683-687
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.11(5) [September 2004]

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