| 李军,申博玺,李志军,陶汉国,刘悦.尿素SCR催化反应中气态氨供给速率计算方法研究[J].内燃机工程,2017,38(5):41-46. |
| Study of Gaseous Ammonia Supply Rate Calculation Method for Urea-SCR Catalytic Reactors |
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| Key Words:IC engine SCR catalyst dynamic conversion efficiency temperature window |
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| Abstract:Based on the research of the gaseous ammonia equilibrium equation in SCR reaction as well as the functional relationship between SCR dynamic conversion rate and ammonia storage amount, a quantitative calculation method for gaseous ammonia supply rate and urea deposit rate is proposed by comparing the catalyst bench evaluation and performance simulation calculation. Using this method, the calculation of specific bench test data shows that there is a certain degree of delay in the decomposition of urea solution at a catalytic converter inlet temperature of 300℃ and space velocity of 40000h-1, but the final decomposition is quite complete. This study provides an effective tool for analyzing the decomposition conditions of urea solution and its effect on engine bench evaluations. |
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