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氨基SCR催化反应的数值模拟及分析 被引量：11

Numerical Simulation and Analysis of Ammonia-Based Selective Catalytic Reduction
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摘要 利用Eley-Rideal机理的计算方法,对NH3催化还原NOx的起燃温度特性和DeNOx性能进行了模拟,并和试验结果作了对比,数值模拟结果与试验结果能够较好吻合,同时对于按柴油机ESC测试循环的试验结果也达到了一致趋势。这说明,数值模型可以用来模拟催化剂的起燃性能和DeNOx性能,对小样评价试验和发动机台架试验可以起到一定的指导作用。用该模型考察了空速、沿载体比长度方向以及n(NO2)/n(NO)(物质的量之比)等因素对起燃温度特性和DeNOx性能的影响。结果表明,低温下空速越大,SCR催化转化器的起燃温度越高;增加载体长度和尾气中含有部分NO2有利于降低起燃温度和提高DeNOx性能。 Based on NH3-SCR Eley-Rideal mechanism, one-dimensional simulation is made to study influence on the light-off temperature behavior of the DeNOx converter and overall DeNOx performance. Simulated results show good agreement with the experimental data. The influence on overall DeNOx performance of space velocity, monolith length, and n（ NO2 ）/n（NO） mole ratio are studied using this model. The results show that high space velocity with low temperature lead to high light-off temperature. Increasing the monolith length and/or existence of NO2 in exhaust can decrease the light-off temperature and improve the DeNOx performance.
作者 佟德辉 李国祥 陶建忠 孙少军
机构地区 山东大学能源与动力工程学院 潍柴动力股份公司技术中心
出处 《内燃机学报》 EI CAS CSCD 北大核心 2008年第4期335-340,共6页 Transactions of Csice
基金 山东省重大科技专项项目(2007ZHZX10304) 山东省自然基金项目(Y2007F26) 国家863计划项目(2006AA110112)
关键词 选择性催化还原反应 Eley-Rideal机理 氨 氮氧化物 数值模拟 Selective catalytic reduction Eley-Rideal mechanism Ammonia Nitrogen oxides Numerical simulation
分类号 TK421.5 [动力工程及工程热物理—动力机械及工程]
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参考文献11

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同被引文献70

  • 1帅石金,张文娟,董红义,王建昕,王志.柴油机尿素SCR催化器优化设计[J].车用发动机,2007(1):44-47. 被引量：37
  • 2董尧清,吴乐欣,刘永祥,王一江.中重型车用柴油机实施欧Ⅳ排放的技术路径[J].汽车技术,2007(3):1-4. 被引量：19
  • 3周响球,杨晨.选择性催化还原脱硝反应器数学模型及仿真[J].重庆大学学报（自然科学版）,2007,30(6):39-43. 被引量：18
  • 4罗晶.尿素一SCR系统优化及催化器的开发研究[D].镇江:江苏大学能源与动力工程学院,2008:1-3.
  • 5龚金科.汽车排放控制技术[M].北京:人民交通出版社,2007:133-136.
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  • 7KOEBEL M, ELSENER M, KLEEMANN M. Urea-SCR: a promising technique to reduce NO2 emissions from automotive diesel engines[J]. Catalysis Today, 2000, 59: 335-345.
  • 8ERICSON C, WESTERBERG B, ODENBRAND I. A state space simplified SCR catalyst model for real time applications [C]// SAE World Congress Exhibition. Detroit: SAE In ternational,2008:2008-01 0616.
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  • 10WINKLER C,F1ORCHINGER P, PATIL M D, et al. Model- ing of SCR DENO, catalyst-looking at the impact of substrate attributes[C]// SAE 2003 World Congress &. Exhibition. De troit: SAEInternational,2003=2003 01 0845.

引证文献11

二级引证文献50

内燃机学报
2008年 第4期

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