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首页> 外文期刊>Environmental Science & Technology >Effects of Cerium Oxide and Ferrocene Nanoparticles Addition As Fuel-Borne Catalysts on Diesel Engine Particulate Emissions: Environmental and Health Implications
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Effects of Cerium Oxide and Ferrocene Nanoparticles Addition As Fuel-Borne Catalysts on Diesel Engine Particulate Emissions: Environmental and Health Implications

机译：氧化铈和二茂铁纳米颗粒作为燃料燃料催化剂对柴油机微粒排放的影响：对环境和健康的影响

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摘要

This study systematically examined the potential impacts of doping CeO_2 and Fe(C_5H_5)_2 nanoparticles as fuel-borne catalysts (FBCs) to ultralow sulfur diesel (ULSD) fuel on the physical, chemical and toxicological characteristics of diesel particulate matter (DPM). The FBCs-doped fuels are effective in promoting soot oxidation and reducing the DPM mass emissions, but lead to a significant increase in the total particle counts due to the formation of self-nucleated metallic nanoparticles. Compared to undoped ULSD, the FBCs-doped fuels result in higher concentrations of particle-phase polycyclic aromatic hydrocarbons (PAHs) and n-alkanes, higher fractions of organic carbon (OC) and water-soluble organic carbon (WSOC) in particles, show slight alterations in soot nanostructure, reduce soot ignition temperature and activation energy. Exposure of the human-type II cell alveolar epithelial cells (A549) to DPM derived from FBCs-doped fuels shows a decrease in cell viability and alterations in the global gene expression with a broad range of biochemical pathways. The overall variations in DPM characteristics are mainly caused by the catalytic combustion process, and are related to the type, properties and contents of FBCs used in diesel fuel as well as the engine operating conditions. Environmental and health implications of the study are highlighted.
机译：这项研究系统地研究了将CeO_2和Fe（C_5H_5）_2纳米颗粒作为燃料载体催化剂（FBC）掺入超低硫柴油（ULSD）燃料对柴油颗粒物（DPM）的物理，化学和毒理学特征的潜在影响。掺有FBC的燃料可有效促进烟灰氧化并减少DPM的质量排放，但由于形成自成核的金属纳米颗粒，导致总颗粒数显着增加。与未掺杂的ULSD相比，掺入FBCs的燃料可产生更高浓度的颗粒相多环芳烃（PAH）和正构烷烃，颗粒中有机碳（OC）和水溶性有机碳（WSOC）的比例更高。烟尘纳米结构的轻微变化，降低了烟尘着火温度和活化能。将人类II型细胞的肺泡上皮细胞（A549）暴露于源自掺有FBC的燃料的DPM中，表明细胞活力降低，并且具有广泛的生化途径，全局基因表达发生变化。 DPM特性的总体变化主要由催化燃烧过程引起，并且与柴油中使用的FBC的类型，特性和含量以及发动机工况有关。强调了这项研究对环境和健康的影响。

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  • 来源
    《Environmental Science & Technology》 |2017年第8期|4248-4258|共11页
  • 作者

    Zhi-Hui Zhang; Rajasekhar Balasubramanian;

  • 作者单位

    Department of Civil and Environmental Engineering, Faculty of Engineering, National University of Singapore, 1 Engineering Drive 2, E1A 02-19, Singapore 117576, Singapore;

    Department of Civil and Environmental Engineering, Faculty of Engineering, National University of Singapore, 1 Engineering Drive 2, E1A 02-19, Singapore 117576, Singapore;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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