Automobile three-way catalytic converter coating, automobile three-way catalytic converter containing same and preparation method of automobile three-way catalytic converter

Abstract

The invention belongs to the field of automobile three-way catalytic converters and particularly relates to a nano diamond-ene containing automobile three-way catalytic converter coating, a method of preparing an automobile three-way catalytic converter by utilizing the same and the obtained automobile three-way catalytic converter. The nano diamond-ene containing automobile three-way catalytic converter coating is prepared from the following raw materials in parts by weight: 15-20 parts of nano diamond-ene, 1-2 parts of an anionic surfactant, 2-3 parts of a nonionic surfactant, 60-75 parts of cordierite honeycomb ceramics, 1.36-4.09 parts of Rh2O3, 1.81-5.45 parts of PTO2, 0.68-2.05 parts of PdO, 0.45-1.36 parts of CeO2 and 0.68-2.05 parts of La2O3. The automobile three-way catalytic converter is high in mechanical strength, strong in thermal conductivity and dispersion and good in stability.

Description

technical field [0001] The invention belongs to the field of three-way catalytic converters for automobiles, and in particular relates to a paint for three-way catalytic converters for automobiles, a three-way catalytic converter for automobiles containing the paint and a preparation method thereof. Background technique [0002] The three-way catalytic converter is the most important gas purification device installed in the exhaust system of the automobile. The main active components are noble metals such as Rh, PT, and Pd. It can remove CO, HC, and NO from the exhaust gas of the automobile. X and other harmful gases are transformed into harmless CO through oxidation and reduction 2 、H 2 O and N 2 . When the high-temperature automobile exhaust gas passes through the purification device, the purification agent in the three-way catalytic converter will enhance CO, HC and NO X The activity of the three gases promotes a certain oxidation-reduction reaction, in which CO is ox...

AI Technical Summary

Problems solved by technology

When the high-temperature automobile exhaust gas passes through the purification device, the purification agent in the three-way catalytic converter will enhance CO, HC and NO X The activity of the three gases promotes a certain oxidation-reduction reaction, in which CO is oxidized to colorless and non-toxic CO at high temperature 2 gas, HC compounds are oxidized to H at high temperature 2 O and CO 2 ;NO X reduced to N 2 and O 2 , in order to reduce the pollution of automobile exhaust to the environment, but the three-way catalytic converter coating currently used is mainly composed of aluminum oxide, which has low mechanical strength. When the road surface is uneven, the violent vibration caused by the cylinder will cause the coating to fall off. When the car is started, due to the poor thermal conductivity of the coating, the three-way catalytic converter cannot heat up to the temperature required for the catalytic reaction in time, and the oxidation-reduction reaction cannot occur, resulting in the discharge of harmful gases. Moreover, the surface area of ​​the traditional coating is small, and the catalytic dispersion and Poor stability, so the existing technology needs further improvement

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