基于AVLBOOST的船舶柴油机SCR催化剂储氨特性仿真

发布时间：2018-02-25 23:27

  本文关键词： 船舶柴油机 选择性催化还原(SCR) 储氨特性 动态过程 转化效率　出处：《大连海事大学学报》2016年02期 　论文类型：期刊论文

【摘要】：为研究SCR催化剂的储氨特性,基于AVL BOOST软件建立某型船舶柴油机SCR催化剂模型,仿真研究不同温度和空速下的SCR催化剂储氨动态过程与储氨量,以及储氨量对转化效率的影响.结果表明:相同空速下,温度增大后催化剂储氨能力显著降低,氨存储时间以及饱和储氨量随温度升高呈线性减小的趋势;相同温度下,空速增大后加快了NH3泄漏,从而使氨存储时间和饱和储氨量有不同程度的降低.低温时(280℃以下),空速对饱和储氨量的影响较大,随着空速增大,饱和储氨量逐渐减小;较高温度时(280℃以上),空速对饱和储氨量的影响非常小.低温时,转化效率随储氨量增大而提高,随着温度的升高,储氨量对转化效率的影响逐渐减小.
[Abstract]:In order to study the ammonia storage characteristics of SCR catalyst, a model of SCR catalyst for marine diesel engine was established based on AVL BOOST software. The dynamic process and amount of ammonia storage of SCR catalyst at different temperature and space velocity were simulated. The results show that the ammonia storage capacity of the catalyst decreases significantly with the increase of temperature, and the ammonia storage time and saturated ammonia storage capacity decrease linearly with the increase of temperature, and at the same temperature, the ammonia storage capacity of the catalyst decreases linearly with the increase of temperature. The increase of space velocity accelerates the leakage of NH3, which decreases ammonia storage time and saturated ammonia storage in varying degrees. At low temperature, the effect of space velocity on saturated ammonia storage is greater than 280 鈩，

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