ACADEMIA ROMÂNĂ Revue Roumaine de Chimie http://web.icf.ro/rrch/ Rev. Roum. Chim., 2017, 62(2), 107-114 CATALYTIC SYSTEMS ON METAL BLOCK CARRIERS FOR NEUTRALIZATION OF EXHAUST GASES OF MOTOR TRANSPORT Larissa SASSYKOVA, a,* Shamil' GIL'MUNDINOV, b** Arailym NALIBAYEVA b and Inna BOGDANOVA b a al-Farabi Kazakh National University, 050040-Almaty, Kazakhstan, b D.V.Sokol’sky Institute of Fuel, Catalysis &Electrochemistry, 050010-Almaty, Kazakhstan Received May 14, 2016 Catalysts on the basis of various metals on metal substrates with the honey comb structure of channels for neutralization of toxic gases of motor transport are prepared. Reaction NO+C 3 H 6 +O 2 at a wide variation of conditions of process is studied. Influence of the nature of the zeolites introduced into composition of the washcoat and the promoting additives of transition metals on activity and properties of block catalysts is researched. The activity of Pd-Mo catalyst is increased at modifying of a washcoat by cations Ce 4+ , Zr 4+ . Introduction to the washcoat of titanium dioxide considerably increases the degree of reduction of nitrogen oxides with propylene. The Fe-containing catalyst modified by NaY zeolite possesses high activity. Degree of conversion of NO x in the studied conditions on synthesized one- and two-component systems reached 80.5-100%, hydrocarbons – from 70.0 to 100%. INTRODUCTION * The leading place in full satisfaction of needs of the population in transportations belongs to the motor transport and by means of that about 70% of all passengers and over 80% of transportation of goods is performed. In comparison with other means of transport, automobile transport is developed with the advancing rates that, in turn, can lead to ecological disasters. At combustion of fuel in cylinders of the engine of the car are produced non-toxic (water vapor, carbon dioxide) and toxic substances, which are the products of incomplete combustion. These harmful substances with atmospheric precipitation fall on the ground and are the sources of pollution of rivers, bodies of water, green spaces and soil. Finally they reach the drinking water, food. Air pollution leads to a slowing of growth, deterioration in the quality of forests and reduce crop yields, disease of * Corresponding author: larissa.rav@mail.ru ** Deceased in 2015 humans and animals, insects and plants, to accelerate of decomposition process of building materials and metal corrosion. 1 Thus, the problems of environment protection against the harmful effects of motor transport requires an immediate solution. Protection of the environment from industrial and transport pollution is constantly increasing demands put forward to improve the methods of preparation and cleaning catalysts for neutralization of gas emissions from harmful impurities. The level of air pollution of many industrial cities of Kazakhstan exceeds the existing standard limits several times. 2 Catalytic cleaning of harmful emissions of cars leads to considerable decrease in contents in the atmosphere of toxic substances and is successfully applied in the developed countries of the world. Pollution of the atmosphere by exhaust gases containing nitrogen oxides (NO x , NO, NO 2 ) currently constitutes a global problem. Nitrogen oxides are extremely poisonous. By the