Catalyst-containing urea for automobiles and preparation method of urea
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 长沙小新新能源科技有限公司
- Publication Date
- 2018-09-07
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
technical field
[0001] The invention belongs to the technical field of automobile tail gas treatment, and in particular relates to catalyst-containing urea for automobiles and a preparation method thereof. Background technique
[0002] SCR technology is to reduce the generation of particulate matter (PM) by strengthening the internal combustion of the engine, and then use urea solution to reduce NO X Catalytic reduction on the SCR catalyst. The SCR selective catalytic reduction system includes three parts: urea solution supply system, urea solution injection and control system, and SCR selective catalytic reduction system. The urea solution is stored in a special storage tank on the vehicle, and the urea solution is sprayed to the hot engine exhaust with a pump (about 300-500°C, meeting the reduction reaction conditions). At high temperature, the urea solution gasifies and decomposes to produce NH 3 , under the action of catalyst, NH 3 with NO in the exhaust X reaction,...