Abstract. Annually, Kazakhstan generates about 5-7 million tons of pollutants, about one third of which are related to transport. In addition, air pollution in urban catchments of Kazakhstan is caused by pollutant emissions from metallurgical, oil refining and chemical enterprises, motor vehicles and railway transport. Toxic substances emitted by motor vehicles have a negative impact on the atmosphere, water bodies, soil and the Earth’s biosphere. Currently, a car engine consumes about 3 kg of atmospheric oxygen when burning one kiloliter of gasoline. Each car emits 60 m3 of gas per hour, and each truck – 120 m3. These substances are very dangerous for living organisms and can be a solution to the problem.
The purpose of this work is mathematical and numerical modeling of transfer processes in automobile neutralizers using modern programming languages and the latest computational technologies. The solution of such problems makes a special contribution to the problem of automobile exhaust gases. The task of exhaust gas treatment is to study the catalytic oxidation of exhaust gases in automobile neutralizers. The mathematical model is a system of differential equations. This system of equations is solved using a computer in an automotive neutralizer.

Key words: protection of the environment, exhaust gases, neutralizer, heat and mass transfer, numerical method.