| 车用柴油机选择性催化还原技术研究进展 |
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| 引用本文： | 楼狄明,张正兴,谭丕强,马滨.车用柴油机选择性催化还原技术研究进展[J].环境科学与技术,2009,32(12). |
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| 作者姓名： | 楼狄明 张正兴 谭丕强 马滨 |
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| 作者单位： | 同济大学汽车学院,上海,201804 |
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| 基金项目： | 上海市科技攻关计划项目 |
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| 摘 要： | 选择性催化还原技术(SCR)是目前唯一可以同时改善柴油机排放和燃油经济性的氮氧化物(NOX)净化技术,而以NH3作为还原剂的SCR技术(NH3-SCR)又是目前最成熟,最具推广前景的SCR技术。文章详细阐述了用于车用柴油机的NH3-SCR技术的反应机理,介绍了温度对SCR反应的影响;列举了典型SCR系统的主要部件并介绍了各部分的功能,以及法规中对车用尿素水溶液(AdBlue)主要指标的规定;总结了目前应用较多的开环、闭环两种控制策略的工作流程及特点,并且分析了各自的优缺点;在柴油机后处理系统集成的角度对SCR与颗粒捕集器(DPF)的两种整合方案进行了分析,对比了两种方案的优缺点;最后分析了SCR技术目前存在的几个问题。
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| 关 键 词： | 柴油机 氮氧化物 选择性催化还原 控制策略 |
Progress of Research on Selective Catalytic Reduction Technology for Vehicle Diesel Engine |
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| LOU Di-ming,ZHANG Zheng-xing,TAN Pi-qiang,MA Bin.Progress of Research on Selective Catalytic Reduction Technology for Vehicle Diesel Engine[J].Environmental Science and Technology,2009,32(12). |
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| Authors: | LOU Di-ming ZHANG Zheng-xing TAN Pi-qiang MA Bin |
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| Institution: | LOU Di-ming,ZHANG Zheng-xing,TAN Pi-qiang,MA Bin (College of Automotive Engineering Tongji University,Shanghai,China) |
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| Abstract: | Selective CatalystReductionTechnology(SCR)isatpresentthe unique technology which can improve the emission and reduce oilconsumption simultaneously. And SCR technology using NH3as reductant (NH3-SCR)is mostmaturely developed and has the brightest foreground. In this paper,the chemical reaction mechanism of Selective Catalytic Reduction technology was expatiated, and the effect of temperature on NOXconversion rate was analyzed:the function of main parts of SCR system was introduced,as well as the specificatio... |
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| Keywords: | diesel NO_x Selective Catalytic Reduction control strategy |
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