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Oxygen storage material for purifying motorcycle tail gas

A technology for oxygen storage materials and exhaust gas purification, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc. problems, to achieve the effect of excellent high temperature thermal stability and low temperature oxygen storage performance

Inactive Publication Date: 2012-05-23
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the low-temperature oxygen storage performance of the existing oxygen storage materials cannot meet the requirements of reducing the light-off temperature of the catalyst.

Method used

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  • Oxygen storage material for purifying motorcycle tail gas
  • Oxygen storage material for purifying motorcycle tail gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Composed of Ce 0.25 Zr 0.65 sn 0.05 mn 0.03 La 0.02 o 1.95 Preparation of oxygen storage materials.

[0017] According to the molar content of each metal element in a given composition, the weight of cerium nitrate, zirconium nitrate, tin chloride, manganese nitrate and lanthanum nitrate is calculated. Accurately weigh cerium nitrate, zirconium nitrate, tin chloride, manganese nitrate and lanthanum nitrate in proportion to prepare a mixed solution, and then drip it into the reaction container with ammonia water under stirring conditions. The amount of precipitant added should make the reaction medium The pH value is maintained at 12-13. After the reactant is fully precipitated, stop stirring and age for about 8 hours, carry out solid-liquid separation by suction filtration, the separated solid phase is washed with water first, and after adding about 10% of the total amount of solid phase surfactant ( 20% polyvinyl alcohol solution) for treatment. After the treat...

Embodiment 2

[0019] Composed of Ce 0.35 Zr 0.55 sn 0.05 mn 0.03 La 0.02 o 1.95 Preparation of oxygen storage materials.

[0020] The specific preparation method is basically the same as that in Example 1, except that the composition of the oxygen storage material is different, and the amount of salts of various metal elements is different.

Embodiment 3

[0022] Composed of Ce 0.45 Zr 0.45 sn 0.05 mn 0.03 La 0.02 o 1.95 Preparation of oxygen storage materials.

[0023] The specific preparation method is basically the same as that in Example 1, except that the composition of the oxygen storage material is different, and the amount of salts of various metal elements is different.

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Abstract

The invention discloses an oxygen storage material for purifying motorcycle tail gas, which belongs to the technical field of catalysis of motorcycle tail gas. The oxygen storage material is a composite oxide, and mainly comprises cerium oxide, zirconium oxide and an aid, wherein the aid is stannic oxide or manganese oxide, and is selected from at least one of lanthanum oxide, strontium oxide, neodymium oxide and yttrium oxide. The oxygen storage material consists of the following components in percentage by mole (based on the total weight of the composite oxide): 25-45 percent of cerium oxide, 45-65 percent of zirconium oxide, 5-15 percent of aid, 1-7 percent of stannic oxide, 1-5 percent of manganese oxide and 1-5 percent of other oxides. The oxygen storage material has excellent oxygen storage performance, and particularly low-temperature oxygen storage stability and high thermal stability, can keep high oxygen storage performance after high-temperature aging, and can meet the requirements of the conventional motorcycle tail gas treatment technology on the low-temperature performance of the oxygen storage material.

Description

technical field [0001] The invention belongs to the technical field of motorcycle tail gas catalysis, and in particular relates to an oxygen storage material used for motorcycle tail gas purification. Background technique [0002] At present, the concept of social sustainable development has become increasingly popular, and people pay more and more attention to the environment, especially the control of air pollution. Motorcycle exhaust emissions are one of the main sources of air pollution, and the environmental pollution caused by motorcycles has increasingly become an important factor affecting environmental quality and restricting the healthy development of the motorcycle industry, which has attracted great attention from all countries in the world. Many countries have established motorcycle exhaust emission standards and are becoming increasingly strict, requiring all motorcycle exhaust emissions to meet the required standards. From July 1, 2008, China has implemented ...

Claims

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Application Information

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IPC IPC(8): B01D53/94B01J23/34B01J23/14B01J23/10
Inventor 周永强刘海涛李纪委马建华杨昕宇尹德武
Owner WENZHOU UNIVERSITY
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