III International Conference

PP-III-35CATALYTICAL PURIFICATION OF CAR EXHAUST FROM NITROGEN OXIDESAND CARBON (II) OXIDEIvanova Yu.V., Kuz'mina R.I., Kozhakhina A.V., Liventsev P.V.Saratov State University, Saratov, RussiaE-mail: IvanovaJV@yandex.ruThe exhaust of industrial enterprises and motor transport contains carbon oxide (CO),hydrocarbons (C x H y ), and nitrogen oxides (NO x ). Reduction of their concentration by meansof combustion improvement and novel technologies of exhausting gas purification is now atopical problem. Catalytical techniques are most promising of all the available ones. Amongvarious heterogeneous-catalytical reactions, of special environmental interest is complexredox neutralization of nitrogen oxides with carbon monoxide or hydrocarbons.Motor transport exhaust containing nitrogen and carbon oxides, benz(α)pyrene,formaldehyde, hydrocarbons etc. contributes much to air pollution in big cities of Russia.To reduce the harmful effect of this exhaust on the public health is an important task inthe framework of atmosphere-protection measures for a city. Aluminum-nickel-coppercatalysts prepared in different conditions of ultrasonic treatment of the heterogeneous systemcarrier + aqueous solutions of active metal salts were studied. The system was treated in acommercial plant (Fig. 1) at a working voltage of 260 V, the temperature was -25 °С,frequency 22 and 35 kHz, duration 2 min, a resonance mode of operation with developedcavitation in water.4Figure 1. A scheme of the commercial plant for ultrasonic treatment of catalysts.1 - an ultrasonic generator UZGZ-4, 2 - an ultrasonic reactor RAP-1 (acousticallytransparent), 3 - a support, 4 - a suspension with the material to treatThe reaction of complex exhaust neutralization was performed on a laboratory flowingtypeset at a volume rate of the neutralized gas 1000 h-1 within 100-500 °С. Ultrasonictreatment was employed for targeted influence on the catalytic system.534