Ammoxidation catalyst for diesel engine exhaust gas purification system and preparation method thereof

A tail gas purification and ammonia oxidation technology, which is applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problem of high selectivity, and achieve the effects of simple preparation method, reduced ammonia slip, and high N2 selectivity
CN106902864AInactive Publication Date: 2017-06-30WUXI WEIFU ENVIRONMENT PROTECTION CATALYST
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
WUXI WEIFU ENVIRONMENT PROTECTION CATALYST
Publication Date
2017-06-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to an ammoxidation catalyst and a preparation method thereof, and belongs to the technical field of catalyst preparation. The catalyst comprises a carrier and a coating for coating the carrier. Precious metal platinum is loaded in the coating and the loading capacity of platinum is 0.01 to 1 g / L. The coating comprises composite oxides and molecular sieves. The composite oxides account for 60 to 99% of the quality of the coating. The molecular sieves account for 1 to 40% of the quality of the coating. The coated weight of the coating is 80 to 150 g / L. The preparation method is simple and the steps are easy to operate. The catalyst obtained through preparation is used for downstream usage of SCR method and is capable of effectively reducing the escape of ammonia.
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Description

technical field

[0001] The invention relates to an ammonia oxidation catalyst and a preparation method thereof, belonging to the technical field of catalyst preparation. Background technique

[0002] Due to the high fuel economy and CO 2 The advantages of low emissions have made diesel vehicles more and more popular in most developed countries, especially in Europe. Pollutants emitted by diesel vehicles contain nitrogen oxides (NO x ), particulate matter (PM), and incompletely burned carbon monoxide (CO) and hydrocarbons (HC). NO x Nitric oxide (NO) and nitrogen dioxide (NO 2 ). As we all know, NO x It is one of the compounds that form photochemical smog and acid rain, causing a series of health and environmental problems. Therefore, the NO x Revert to N 2 And do not generate other toxic and harmful substances, in order to eliminate NO in motor vehicle exhaust x Adverse effects on humans and the environment.

[0003] Selective catalytic reduction (SCR) is the use ...

Claims

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