Removal of Particulate Matter Emissions from a Vehicle Using a Self-Powered Triboelectric Filter
Removal of Particulate Matter Emissions from a Vehicle Using a Self-Powered Triboelectric Filter
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DOI：
10.1021/acsnano.5b06327
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发表时间：
2015-12-01
期刊：
影响因子：
17.1
通讯作者：
Wang, Zhong Lin
中科院分区：
文献类型：
--
作者：
Han, Chang Bao;Jiang, Tao;Wang, Zhong Lin
汽车尾气颗粒物污染已成为城市环境的主要污染源之一。虽然柴油机微粒过滤器已用于重型柴油车，但由于成本高，大多数汽油汽车或轻型车没有微粒过滤器。在这里，我们介绍了一种自供电的摩擦电过滤器，用于去除汽车尾气中的PM，利用摩擦带电效应。有限元模拟结果表明，PTFE颗粒与电极之间的碰撞或摩擦可产生较大的摩擦电荷，并形成高达12 MV/m的空间电场，在两电极之间伴随着近似6 kV的开路电压，与实测值3 kV相当。通过控制振动频率和颗粒填充比，利用摩擦电过滤器的高电场可以去除气溶胶中94%以上的PMs。在真实的汽车尾气中，摩擦电过滤器利用尾管的自振动对PM2.5具有类似于95.5%的质量收集效率。
Particulate matter (PM) pollution from automobile exhaust has become one of the main pollution sources in urban environments. Although the diesel particulate filter has been used in heavy diesel vehicles, there is no particulate filter for most gasoline cars or light-duty vehicles because of high cost. Here, we introduce a self-powered triboelectric filter for removing PMs from automobile exhaust fumes using the triboelectrification effect. The finite element simulation reveals that the collision or friction between PTFE pellets and electrodes can generate large triboelectric charges and form a space electric field as high as 12 MV/m, accompanying an open-circuit voltage of similar to 6 kV between the two electrodes, which is comparable to the measured value of 3 kV. By controlling the vibration frequency and fill ratio of pellets, more than 94% PMs in aerosol can be removed using the high electric field in the triboelectric filter. In real automobile exhaust fumes, the triboelectic filter has a mass collection efficiency of similar to 95.5% for PM2.5 using self-vibration of the tailpipe.