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首页> 外文期刊>Environmental Science & Technology >In-Use NOx Emissions from Diesel and Liquefied Natural Gas Refuse Trucks Equipped with SCR and TWC, Respectively
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In-Use NOx Emissions from Diesel and Liquefied Natural Gas Refuse Trucks Equipped with SCR and TWC, Respectively

机译：分别装有SCR和TWC的柴油和液化天然气垃圾车的在用NOx排放量

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摘要

The California Air Resources Board (ARB) and the City of Sacramento undertook this study to characterize the in-use emissions from model year (MY) 2010 or newer diesel, liquefied natural gas (LNG), and hydraulic hybrid diesel engines during real-world refuse truck operation. Emissions from five trucks, two diesels equipped with selective catalytic reduction (SCR), two LNG's equipped with three-way catalyst (TWC), and one hydraulic hybrid diesel equipped with SCR, were measured using a portable emissions measurement system (PEMS) in the Sacramento area. Results showed that the brake-specific NOx emissions for the LNG trucks equipped with the TWC catalyst were lowest of all the technologies tested. Results also showed that the brake specific NOx emissions from the conventional diesel engines were significantly higher despite the exhaust temperature being high enough for proper SCR function. Like diesel engines, the brake specific NOx emissions from the hydraulic hybrid diesel also exceeded certification although this can be explained on the basis of the temperature profile. Future studies are warranted to establish whether the below average SCR performance observed in this study is a systemic issue or is it a problem specifically observed during this work.
机译：加利福尼亚州空气资源委员会（ARB）和萨克拉曼多市进行了这项研究，以描述真实世界中2010年模型年（MY）或更新型的柴油，液化天然气（LNG）和液压混合柴油发动机的使用中排放量拒绝卡车操作。使用便携式排放测量系统（PEMS）测量了五辆卡车，两辆装有选择性催化还原（SCR）的柴油，两辆装有三效催化剂（TWC）的液化天然气和一辆装有SCR的液压混合柴油的排放。萨克拉曼多地区。结果表明，配备有TWC催化剂的LNG卡车的特定于制动器的NOx排放是所有测试技术中最低的。结果还表明，尽管排气温度足够高以实现正常的SCR功能，但传统柴油发动机的制动比NOx排放量仍显着较高。与柴油发动机一样，液压混合柴油的制动器特定NOx排放也超过了认证标准，尽管可以根据温度曲线进行解释。有必要进行进一步的研究，以确定本研究中观察到的低于平均水平的SCR性能是系统性问题还是在本工作期间专门观察到的问题。

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  • 来源
    《Environmental Science & Technology》 |2017年第12期|6981-6989|共9页
  • 作者

    Chandan Misra; Chris Ruehl; John Collins; Don Chemich; Jorn Hemer;

  • 作者单位

    California Air Resources Board, 1001 1 Street, Sacramento, California 95814, United States;

    California Air Resources Board, 1001 1 Street, Sacramento, California 95814, United States;

    California Air Resources Board, 1001 1 Street, Sacramento, California 95814, United States;

    California Air Resources Board, 1001 1 Street, Sacramento, California 95814, United States;

    California Air Resources Board, 1001 1 Street, Sacramento, California 95814, United States;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
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