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A qualitative correlation between engine exhaust particulate number and mass emissions

机译：发动机排气颗粒数量与质量排放之间的质量相关性

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Diesel particulate are designated as 'carcinogenic'. In this study, a novel approach has been adopted to determine the relationship between particle mass and particle number emissions from a four-cylinder naturally aspired water-cooled transport diesel engine, which is fuelled by mineral diesel and 20% (v/v) Karanja biodiesel blend (B20) under different engine operating conditions. This approach involves establishing a relationship between particle number-mass emissions by mapping the inclination of identified particulate size concentrations for their dominating contribution towards either particle number or particulate mass. Established relationship is found to be dependent on engine operating condition. Experiment were performed on (i) raw engine exhaust, (ii) exhaust from a commercial diesel oxidation catalyst (DOC1) and (iii) exhaust from two in-house prepared DOCs (named as DOC2 and DOC3). Prepared DOCs were coated with Co-Ce mixed oxide and lanthanum perovskite based catalysts. Results obtained by applying this approach exhibited nearly similar particulate emission characteristics for test fuels, mineral diesel and B20. This technique can therefore be successfully adopted for particulate characterization. (C) 2017 Elsevier Ltd. All rights reserved.
机译：柴油机颗粒被称为“致癌物质”。在这项研究中，采用了一种新颖的方法来确定四缸自然吸水水冷运输柴油机的颗粒质量与颗粒数量排放之间的关系，该发动机由矿物柴油和20％（v / v）Karanja燃料生物柴油混合物（B20）在不同的发动机工况下使用。该方法涉及通过映射确定的颗粒尺寸浓度的斜率来确定颗粒数量与排放量之间的关系，确定其对颗粒数量或颗粒质量的主要贡献。建立的关系被发现取决于发动机工况。对（i）发动机原始排气，（ii）商用柴油氧化催化剂（DOC1）的排气和（iii）两个内部准备的DOC（分别称为DOC2和DOC3）的排气进行了实验。制备的DOC涂有Co-Ce混合氧化物和钙钛矿镧基催化剂。通过这种方法获得的结果显示出测试燃料，矿物柴油和B20的颗粒排放特征几乎相似。因此，该技术可以成功地用于颗粒表征。 （C）2017 Elsevier Ltd.保留所有权利。

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