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首页> 外文期刊>Environmental Science & Technology >Promoted Decomposition of NO_X in Automotive Diesel-like Exhausts by Electro-Catalytic Honeycombs
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Promoted Decomposition of NO_X in Automotive Diesel-like Exhausts by Electro-Catalytic Honeycombs

机译：电催化蜂窝促进汽车柴油样排气中NO_X的分解

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摘要

NO and NO_2 (collectively called NO_x) are major air pollutants in automotive emissions. More effective and easier treatments of NO_x than those achieved by the present methods can offer better protection of human health and higher fuel efficiency that can reduce greenhouse gas emissions. However, currently commercialized technologies for automotive NO_x emission control cannot effectively treat diesel-like exhausts with high NO_x concentrations. Thus, exhaust gas recirculation (EGR) has been used extensively, which reduces fuel efficiency and increases particulate emission considerably. Our results show that the electro-catalytic honeycomb (ECH) promotes the decomposition of NO_x to nitrogen and oxygen, without consuming reagents or other resources. NO_x can be converted to nitrogen and oxygen almost completely. The ECHs are shown to effectively remove NO_x from gasoline-fueled diesel-like exhausts. A very high NO concentration is preferred in the engine exhaust, especially during engine cold-start. Promoted NO_x decomposition (PND) technology for real-world automotive applications is established in this study by using the ECH. With PND, EGR is no longer needed. Diesel-like engines can therefore achieve superior fuel efficiency, and all major automotive pollutants can be easily treated due to high concentration of oxygen in the diesel-like exhausts, leading to zero pollution.
机译：NO和NO_2（统称为NO_x）是汽车排放中的主要空气污染物。与通过本方法获得的NO_x相比，更有效，更轻松的NO_x处理可以为人类健康提供更好的保护，并且可以降低温室气体排放的更高燃料效率。然而，当前用于汽车NO_x排放控制的商业化技术不能有效地处理具有高NO_x浓度的类柴油的排气。因此，排气再循环（EGR）已被广泛使用，这降低了燃料效率并显着增加了微粒排放。我们的结果表明，电催化蜂窝体（ECH）促进了NO_x分解为氮和氧，而无需消耗试剂或其他资源。 NO_x几乎可以完全转化为氮气和氧气。 ECHs被证明可以有效地从类似汽油的柴油机废气中去除NO_x。在发动机排气中，尤其是在发动机冷启动期间，非常希望NO浓度很高。通过使用ECH，本研究建立了用于实际汽车应用的先进的NO_x分解（PND）技术。使用PND，不再需要EGR。因此，类柴油发动机可以实现出色的燃油效率，并且由于类柴油排气中的氧气浓度很高，因此可以轻松处理所有主要的汽车污染物，从而实现零污染。

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  • 来源
    《Environmental Science & Technology》 |2015年第6期|3711-3717|共7页
  • 作者

    Ta-Jen Huang; De-Yi Chiang; Chi Shih; Cheng-Chin Lee; Chih-Wei Mao; Bo-Chung Wang;

  • 作者单位

    Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan 30013, ROC;

    Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan 30013, ROC;

    Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan 30013, ROC;

    Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan 30013, ROC;

    Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan 30013, ROC;

    Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan 30013, ROC;

  • 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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