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1 Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje

1 1999

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Transition metal oxides on TiO2 catalysts for reduction of NOx with ammonia.

Parus W., Witkowski A.

Prace Naukowe Instytutu Chemii i Technologii Nafty i Węgla Politechniki Wrocławskiej. Konferencje

1999

Vol. 9, nr 56

153-158

In the paper the results of further investigations of catalytic activity of transition metal oxides (V2O5 and MoO3) on TiO2 catalysts for reduction of nitrogen oxides with ammonia are presented. The measurements were carried out using flow tube reactor in the kinetic region (powder of catalyst) and for chosen catalysts also in the diffusion region (grains of catalyst). On the basis of the results in the kinetic region for all applied catalysts the kinetic equations were obtained. By comparison the results for the kinetic region with the results for the diffusion region, for chosen catalysts the effective coefficients of diffusion were calculated. It has been stated that used catalysts have high activity in the selective catalytic reduction of nitrogen oxides with ammonia process and can work effectively in wide range of temperatures (200-500 C), using load 2 10 -5 h -1. The structures of the catalysts were tested using X - ray analysis, infrared spectroscopy and scanning microscopy.