Method for catalytic reduction of nox in exhaust gas of hydrogen engine
By using an NTA catalyst to convert H2 in the exhaust gas of a hydrogen engine into NH3, and then using an SCR catalyst to generate N2 and H2O, the problems of urea crystallization and ammonia leakage in traditional technologies are solved, achieving a highly efficient and low-cost NOx purification effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA AUTOMOTIVE ENG RES INST
- Filing Date
- 2026-05-07
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional NOx aftertreatment technologies suffer from problems such as urea crystallization, ammonia leakage, and decreased activity at high temperatures in hydrogen engine exhaust, making them ineffective at purifying NOx under lean combustion conditions.
The NTA catalyst is used to convert H2 in the exhaust gas of the hydrogen engine into NH3, and the NH3 is reacted with NOx in the exhaust gas to generate N2 and H2O through the SCR catalyst, forming a coupled catalytic system that avoids the need for external reducing agents.
It achieves efficient purification of NOx in hydrogen engine exhaust, solves the problems of urea crystallization and ammonia leakage, improves NOx conversion rate under medium and low temperature conditions, and reduces catalyst cost.
Smart Images
Figure SMS_1 
Figure SMS_2 
Figure REF-OBJ-1778146263611-000003