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A kind of preparation method and application of automobile exhaust gas purification catalyst

A technology for purifying catalysts and automobile exhaust, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as easy loss and expensive precious metals, and achieve control The effect of convenience, simple preparation method and large output

Active Publication Date: 2018-03-16
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main body of the current market is precious metal catalysts, but precious metals are expensive and easy to lose

Method used

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  • A kind of preparation method and application of automobile exhaust gas purification catalyst
  • A kind of preparation method and application of automobile exhaust gas purification catalyst
  • A kind of preparation method and application of automobile exhaust gas purification catalyst

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Experimental program
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Effect test

Embodiment 1

[0019] Potassium ferrate was prepared as a 0.13mol / L solution, then mixed with manganese sulfate at a molar ratio of 1:1, sulfuric acid was added to adjust the pH value of the solution to 1-2, and the hydrothermal reaction was carried out at 140°C for 12 hours, and the obtained product was filtered, Washing followed by drying yields an iron-doped manganese oxide catalyst.

[0020] Then above-mentioned catalyst is characterized, its XRD diffractogram is as follows figure 1 , we know that it is compatible with the α-MnO of the JCPDF standard card 44-0141 model 2 correspond; figure 2 The scanning electron microscope image of the catalyst prepared for this example, it can be seen from the figure that it is in the shape of a nanoparticle, which is different from the common one-dimensional nanorods in the prior art; image 3 It is the corresponding elemental analysis result diagram, from which we can know that iron is uniformly doped into manganese dioxide.

Embodiment 2

[0022] Prepare potassium ferrate into a 0.13mol / L solution, then mix it with manganese sulfate at a molar ratio of 1:1, add sulfuric acid to adjust the pH of the solution to 1-2, react at 120°C for 20 hours, and filter and wash the obtained product Then dry to obtain the iron-doped manganese oxide catalyst.

Embodiment 3

[0024] Prepare potassium ferrate into a 0.195mol / L solution, then mix it with manganese sulfate at a molar ratio of 1:1, add sulfuric acid to adjust the pH of the solution to 1-2, react at 140°C for 16 hours, and filter and wash the obtained product Then dry to obtain the iron-doped manganese oxide catalyst.

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Abstract

The invention discloses a preparation method and application of an automobile exhaust purification catalyst and belongs to the field of material catalysis. The preparation method of the automobile exhaust purification catalyst includes the following steps that potassium ferrate and manganese salt which are at the equal molar ratio are mixed, acid is added, the pH value of the solution is adjusted to be 1 to 2, a hydrothermal reaction is conducted for 8-24 h at the temperature of 100-160 DEG C, the obtained product is filtered and washed and then dried, and then the catalyst is obtained. The preparation method for preparing manganese oxide doped with iron in situ through a one-step method has the advantages that the preparation method is simple, control is convenient, the yield is high, and industrialization is easy. The prepared iron-doped manganese oxide catalyst is used for simulating purification of automobile exhaust and shows good catalysis performance.

Description

technical field [0001] The invention belongs to the field of material synthesis, and in particular relates to a preparation method and application of an automobile tail gas purification catalyst. Background technique [0002] Nitrogen oxides (NO x ) are harmful to the environment and human health. One of its main sources of pollution is automobile exhaust. With the increase in the proportion of vehicles owned per capita, my country's NO x Emissions continue to rise, putting enormous pressure on the environment. One of the main measures to control exhaust emissions and strive to achieve zero pollution is the high-efficiency automobile exhaust purification catalyst. The current main body of the market is precious metal catalysts, but precious metals have the disadvantages of being expensive and easy to lose. Therefore, the development and application of non-precious metal catalysts has become one of the current research hotspots. Among the non-precious metal components, m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01D53/86B01D53/56
CPCB01D53/8628B01J23/8892
Inventor 孙明许晓琪陈嘉欣章本天程高蓝邦叶飞余林成晓玲
Owner GUANGDONG UNIV OF TECH