Zirconium titanate-based solid solution carrier material for motorcycle exhaust catalyst carrier

Abstract

The invention relates to a zirconium titanate-based solid solution carrier material for a motorcycle exhaust catalyst carrier, which mainly consists of titanium oxide, zirconium oxide and a stabilizer; the mixing ratio by parts by weight is as follows: 10-45 parts of the zirconium oxide, 10-45 parts of the titanium oxide and 1-10 parts of the stabilizer; and the stabilizer is one or two of yttrium oxide, lanthanum oxide, cerium oxide, copper oxide and barium oxide, and the stabilizer exists in the form of zirconium titanate solid solution. The zirconium titanate-based solid solution carrier material has the advantages that as a metal oxide-doped zirconium titanate composite oxide with cheap price is used as the carrier material of a three-way catalyst, a valuable Rh metal can be saved and the cost of the product can be reduced. The using effect proves that the transformation efficiency of a catalyst prepared by the carrier material to main pollutants of NOx, HC and CO can be more than 90%.

Description

technical field [0001] The invention relates to the field of motorcycle exhaust catalysts. Background technique [0002] Three-way catalysts for motorcycles have been successfully developed and widely used. It can simultaneously reduce the main pollutant NO x , HC and CO are reduced by more than 90%. However, the current three-way catalysts mainly use noble metals such as Pt, Rh, and Pd as the active components of the catalyst, wherein Rh is used to reduce NOx to N 2 The most effective component of Rh, but Rh is scarce on the earth, expensive, and not easy to purchase. Therefore, the development of a catalyst that can purify NOx with only Pt and Pd is of great significance for the control of motor vehicle emissions. [0003] The three-way catalyst is a supported catalyst, and the support has an important influence on the catalytic performance of the catalyst. At present, the three-way catalyst carrier mainly adopts γ-Al 2 o 3 . Due to special properties, ZrO 2 、TiO ...

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Problems solved by technology

[0004] The purpose of the present invention is exactly to mainly use noble metals such as Pt, Rh, Pd as the active component of catalyzer at existing motorcycle three-way catalyst, and wherein Rh is to reduce NOx to be N 2 The most effective component of Rh, but the stock of Rh is rare on the earth, and the price is too expensive. To provide a zirconium titanate composite oxide doped with cheap low-priced metal oxides as the carrier material of the three-way catalyst, only use Pt and Pd, catalysts that can purify NOx, are of great significance to the control of motor vehicle emissions