Chemiions and nanoparticle formation in diesel engine exhaust
Chemiions and nanoparticle formation in diesel engine exhaust
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柴油发动机排气中的化学离子和纳米颗粒的形成
DOI：
10.1029/2001gl013732
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发表时间：
2001
影响因子：
5.2
通讯作者：
F. Yu
中科院分区：
文献类型：
--
作者：
F. Yu
柴油发动机排放的纳米颗粒（直径< 50纳米）由于其潜在的健康影响而越来越受到关注。我们认为燃烧过程中产生的化学物质在这些纳米颗粒的形成中起着重要作用。基于我们的化学理论预测的纳米颗粒性质在总纳米颗粒浓度、对燃料硫含量和第二阶段稀释条件的敏感性方面与测量结果密切匹配，而经典的均匀成核无法解释这些观察到的性质。我们的研究表明，形成的纳米颗粒总数对化学浓度非常敏感，我们提出了一种通过去除尾气中的离子来有效减少车辆纳米颗粒排放的技术。
The nanoparticles (diameter < 50 nm) emitted by diesel engines have received increasing attention due to their potential health effects. We propose that chemiions generated during combustion play an important role in the formation of these nanoparticles. The predicted nanoparticle properties based on our chemiion theory closely match measurements in terms of total nanoparticle concentrations, and their sensitivity to fuel sulfur contents and second stage dilution conditions, while the classical homogeneous nucleation fails to explain these observed properties. Our study indicates that total number of nanoparticles formed is very sensitive to chemiion concentrations, and we propose a technique to effectively reduce vehicle nanoparticle emissions by removing ions in the exhaust.