一种车辆用氨氢发动机的尾气净化装置及方法

By using a series reaction of a low-temperature ammonia decomposition catalyst and an SCR catalyst, the purification problems of nitrogen oxides and unburned ammonia were solved, achieving a highly efficient exhaust gas purification effect and simplifying the device structure.

CN116927934BActive Publication Date: 2026-07-17FUZHOU UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FUZHOU UNIV
Filing Date
2023-08-26
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies cannot effectively reduce the concentration of nitrogen oxides and unburned ammonia, especially under high ammonia-to-diesel ratio conditions, where the exhaust gas purification effect of ammonia-hydrogen engines is poor.

Method used

High-concentration ammonia is partially decomposed using a low-temperature ammonia decomposition catalyst. Combined with an SCR catalyst and a low-temperature ammonia oxidation catalyst, nitrogen oxides and excess ammonia are removed through a series reaction, avoiding the use of urea or liquid ammonia reducing agents and simplifying the device structure.

Benefits of technology

It effectively reduces unburned ammonia concentration and nitrogen oxide emissions, has a good purification effect, simplifies the equipment structure, and reduces the need for SCR and ASC reactors.

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Abstract

本发明公开了一种车辆用氨氢发动机的尾气净化装置及方法，所述装置包括氨分解催化部、SCR催化部和氨氧化催化部，氨分解催化部内设置有低温氨分解催化剂，SCR催化部内设置有SCR催化剂，氨氧化催化部内设置有低温氨氧化催化剂，氨分解催化部、SCR催化部和氨氧化催化部沿尾气的流动方向串联设置。本发明通过低温氨分解催化剂，有效降低未燃氨的浓度；通过SCR催化剂将未分解的氨和发动机燃烧产生的氮氧物进行反应，无需通过喷射尿素或液氨等方式加入还原剂，去除氮氧化物；采用低温氨氧化催化剂反应去除多余的氨，无需再装配SCR和ASC反应器，结构简单，净化效果好。
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Citation Information

Patent Citations

  • SCR catalyst and preparation method therefor

    CN104841474A

  • Low concentration organic waste gas concentrating, catalyzing and purifying device and use method thereof

    CN109331629A

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    CN110380066A

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