Fireproof sheet honeycomb ceramic automobile exhaust purification material and preparation method thereof

Abstract

The invention discloses a fireproof sheet honeycomb ceramic automobile exhaust purification material and a preparation method thereof. The fireproof sheet honeycomb ceramic automobile exhaust purification material is characterized by being prepared from, by weight, 10-15 parts of floating beads, 40-50 parts of cordierite, 1-3 parts of TiO2, 1-3 parts of clay, 4-8 parts of sodium carbonate, 10-15 parts of stearic acid, a proper amount of a 1 mol / L HNO3 solution, 50-60 parts of nanometer aluminum oxide sol, 1-3 parts of 1 mol / L La(NO3)3, 1-2 parts of a 1 mol / L Sr(NO3)2, 0.5-1 part of a 1 mol / L Co(NO3)2, 2-6 parts of a 1 mol / L critic acid and 100-200 parts of deionized water. By means of ZrO2 powder and CrO2 powder, the comprehensive performance of a honeycomb ceramic carrier is enhanced, and the honeycomb ceramic carrier has the advantages of being high in compressive strength, resistant to high temperature, good in chemical stability, high in corrosion resistance and the like; due to the load La-Sr-Co-O catalyst, the automobile exhaust purification efficiency is improved; meanwhile, the honeycomb ceramic carrier is made into the sheet shape, installation and replacement are convenient, meanwhile, the cost is saved, sufficient utilization of resources are promoted, and the current environment-friendly trend is met.

Description

technical field [0001] The invention relates to ceramic materials, in particular to a refractory sheet-shaped honeycomb ceramic automobile tail gas purification material and a preparation method thereof. technical background [0002] Motor vehicle pollution has become an important source of air pollution in my country and an important cause of haze and photochemical smog pollution. Vehicle exhaust is mainly nitrogen oxides (NO x ), hydrocarbons (HC), carbon monoxide (C0), particulate matter, etc., have become the main air pollutants. Therefore, the most important thing to solve the air pollution problem is to solve the problem of automobile exhaust pollution. [0003] The automobile exhaust purifier is mainly composed of three parts: the shell, the carrier and the catalyst, among which the selection of the catalyst is very important. Three-way catalyst refers to the ability to remove NO at the same time x , HC, CO these three main pollutants catalysts, a large number of e...

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Problems solved by technology

Zhu Jie used cordierite honeycomb ceramics as the carrier in his master's thesis "Study on the Catalytic Performance of Cordierite Honeycomb Ceramics Loaded La-Sr-Co-O on Automobile Exhaust Gas", La-Sr-Co-O perovskite composite oxidation As the active component of the catalyst, a monolithic automobile exhaust catalyst has been prepared, but the heat resistance of the prepared ceramic carrier is not high enough, and once the monolithic catalyst is damaged, it needs to be replaced as a whole, which wastes resources and increases the cost of use.