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Role of particle oxidation catalyst on emission reduction of a non-road diesel engine: A multi case study
Chemical Engineering Science ( IF 4.7 ) Pub Date : 2022-07-18 , DOI: 10.1016/j.ces.2022.117914
Renhua Feng , Zhengwei Sun , Xiulin Hu , Guanghua Li , Banglin Deng

Non-road diesel engine emissions present a serious hazard to both users and the environment. Despite several research on the emission control of non-road diesel engines, the role of particle oxidation catalysts (POC) in emission reduction is still not fully understood. Therefore, the current study investigates this factor during transient operation. The emissions of three modes, POC1 (symmetric layout and plugging channel), POC2 (asymmetric layout and unplugging channel), and POC3 (asymmetric layout and plugging channel), were tested and compared to the original emissions. The experimental results show that the conversion efficiencies of the POC1–POC3 systems for particulate matter (PM) were 33 %, 53 %, and 61 %, respectively. The asymmetrical channel layout can increase the PM conversion efficiency by 28 % compared with the symmetrical channel layout, and the plugging structure can increase the PM conversion efficiency by 8 %. The conversion efficiency of nitrogen oxides (NOx) is above 87 %, and the asymmetric channel layout can increase it by 8 %. However, the plugging structure has almost no effect on the conversion of NOx when compared to the results for POC2 and POC3. HC and CO emissions were very low in all cases. Overall, only POC3 met the CHINA IV emission standards for non-road diesel engines, and the detailed process is discussed in this paper. The current study can help with after-treatment layout for non-road diesel engines.



中文翻译:

颗粒氧化催化剂在非道路柴油机减排中的作用:多案例研究

非道路柴油发动机排放对用户和环境都造成严重危害。尽管对非道路柴油发动机的排放控制进行了多项研究,但颗粒氧化催化剂(POC)在减排中的作用仍未完全了解。因此,目前的研究调查了瞬态操作期间的这一因素。测试了 POC1(对称布局和堵塞通道)、POC2(不对称布局和拔出通道)和 POC3(不对称布局和堵塞通道)三种模式的排放,并与原始排放进行了比较。实验结果表明,POC1-POC3 系统对颗粒物 (PM) 的转化效率分别为 33%、53% 和 61%。非对称通道布局相比对称通道布局可以提高28%的PM转换效率,而插塞结构可以提高8%的PM转换效率。氮氧化物(NOx)的转化效率在87%以上,非对称通道布局可提高8%。然而,与 POC2 和 POC3 的结果相比,堵塞结构对 NOx 的转化几乎没有影响。在所有情况下,HC 和 CO 排放量都非常低。总体而言,只有 POC3 达到了非道路柴油机的国四排放标准,具体过程在本文中讨论。目前的研究有助于非道路柴油发动机的后处理布局。氮氧化物(NOx)的转化效率在87%以上,非对称通道布局可提高8%。然而,与 POC2 和 POC3 的结果相比,堵塞结构对 NOx 的转化几乎没有影响。在所有情况下,HC 和 CO 排放量都非常低。总体而言,只有 POC3 达到了非道路柴油机的国四排放标准,具体过程在本文中讨论。目前的研究有助于非道路柴油发动机的后处理布局。氮氧化物(NOx)的转化效率在87%以上,非对称通道布局可提高8%。然而,与 POC2 和 POC3 的结果相比,堵塞结构对 NOx 的转化几乎没有影响。在所有情况下,HC 和 CO 排放量都非常低。总体而言,只有 POC3 达到了非道路柴油机的国四排放标准,具体过程在本文中讨论。目前的研究有助于非道路柴油发动机的后处理布局。详细过程将在本文中讨论。目前的研究有助于非道路柴油发动机的后处理布局。详细过程将在本文中讨论。目前的研究有助于非道路柴油发动机的后处理布局。

更新日期:2022-07-21
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