利用便携式测量系统探索中国在用轻型柴油卡车的超细粒子排放特征。

IF 7.7 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Environmental Research Pub Date : 2024-10-24 DOI:10.1016/j.envres.2024.120234
Dong Li, Dongyang Wu, Xiaoliang Gui, Songdi Liao, Manni Zhu, Fei Yu, Junyu Zheng
{"title":"利用便携式测量系统探索中国在用轻型柴油卡车的超细粒子排放特征。","authors":"Dong Li, Dongyang Wu, Xiaoliang Gui, Songdi Liao, Manni Zhu, Fei Yu, Junyu Zheng","doi":"10.1016/j.envres.2024.120234","DOIUrl":null,"url":null,"abstract":"<p><p>Diesel vehicle exhaust is one of the major contributors to ultrafine particles (UFPs) in urban areas in China. However, there is still a lack of knowledge about UFPs emission characteristics from current in-use diesel vehicles. This study has carried out an on-road test of 10 in-use Light-duty Diesel Trucks (LDDTs) with different emission control standards in China using a self-established portable measurement system based on the Electronic Low-pressure Impactor (ELPI) and characterized the ultrafine particle number (PN) concentration, particle size distribution and metal element contents. The results revealed a significant reduction of 93.37% in the average PN<sub>0.1</sub> emission factor of LDDTs from China IV to China VI. Notably, LDDTs compliant with the China VI vehicle emission control standard exhibited the lowest PN<sub>0.1</sub> and PM<sub>0.1</sub> emission factors, measuring 4.991×10<sup>14</sup> #/km and 0.627 g/km, respectively. By taking into account emissions under real driving conditions, we found that the PN emission rates grow with the increase of the Vehicle Specific Power (VSP). The cold-start phase had higher PN emissions than the hot-start phase, with 8590, 1890, 477, and 22 times higher than those of the ambient air (1.18×10<sup>5</sup> #/cm<sup>3</sup>), respectively. The installation of Diesel Particulate Filter (DPF) can decrease UFPs by more than 99.8%, while the PN emission factor during the DPF regeneration stage (1.85×10<sup>16</sup> #/km) increased by 5 orders of magnitude that of the DPF normal works (7.51×10<sup>11</sup> #/km). Metal element contents analysis shows that Fe, Ca, Al and Mg are the dominant elements in UFPs of LDDT exhaust gas, but the element of Ni is slightly increasing in a China VI, possibly due to the new automotive engine exhaust manifolds being made of Ni instead of cast iron for the purpose of having more high-temperature resistance. Our study demonstrates the importance of monitoring and routine maintenance of exhaust after-treatment systems.</p>","PeriodicalId":312,"journal":{"name":"Environmental Research","volume":null,"pages":null},"PeriodicalIF":7.7000,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Exploring ultrafine particle emission characteristics from in-use light-duty diesel trucks in China using a portable measurement system.\",\"authors\":\"Dong Li, Dongyang Wu, Xiaoliang Gui, Songdi Liao, Manni Zhu, Fei Yu, Junyu Zheng\",\"doi\":\"10.1016/j.envres.2024.120234\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Diesel vehicle exhaust is one of the major contributors to ultrafine particles (UFPs) in urban areas in China. However, there is still a lack of knowledge about UFPs emission characteristics from current in-use diesel vehicles. This study has carried out an on-road test of 10 in-use Light-duty Diesel Trucks (LDDTs) with different emission control standards in China using a self-established portable measurement system based on the Electronic Low-pressure Impactor (ELPI) and characterized the ultrafine particle number (PN) concentration, particle size distribution and metal element contents. The results revealed a significant reduction of 93.37% in the average PN<sub>0.1</sub> emission factor of LDDTs from China IV to China VI. Notably, LDDTs compliant with the China VI vehicle emission control standard exhibited the lowest PN<sub>0.1</sub> and PM<sub>0.1</sub> emission factors, measuring 4.991×10<sup>14</sup> #/km and 0.627 g/km, respectively. By taking into account emissions under real driving conditions, we found that the PN emission rates grow with the increase of the Vehicle Specific Power (VSP). The cold-start phase had higher PN emissions than the hot-start phase, with 8590, 1890, 477, and 22 times higher than those of the ambient air (1.18×10<sup>5</sup> #/cm<sup>3</sup>), respectively. The installation of Diesel Particulate Filter (DPF) can decrease UFPs by more than 99.8%, while the PN emission factor during the DPF regeneration stage (1.85×10<sup>16</sup> #/km) increased by 5 orders of magnitude that of the DPF normal works (7.51×10<sup>11</sup> #/km). Metal element contents analysis shows that Fe, Ca, Al and Mg are the dominant elements in UFPs of LDDT exhaust gas, but the element of Ni is slightly increasing in a China VI, possibly due to the new automotive engine exhaust manifolds being made of Ni instead of cast iron for the purpose of having more high-temperature resistance. Our study demonstrates the importance of monitoring and routine maintenance of exhaust after-treatment systems.</p>\",\"PeriodicalId\":312,\"journal\":{\"name\":\"Environmental Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":7.7000,\"publicationDate\":\"2024-10-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Environmental Research\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://doi.org/10.1016/j.envres.2024.120234\",\"RegionNum\":2,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environmental Research","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1016/j.envres.2024.120234","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0

摘要

柴油车尾气是中国城市地区超细粒子(UFPs)的主要来源之一。然而,人们对目前在用柴油车的超细颗粒物排放特征仍然缺乏了解。本研究使用基于电子低压冲击仪(ELPI)的自制便携式测量系统,对中国 10 辆不同排放控制标准的在用轻型柴油卡车(LDDT)进行了道路测试,并对超细粒子数(PN)浓度、粒径分布和金属元素含量进行了表征。结果表明,从国 IV 到国 VI,LDDT 的平均 PN0.1 排放系数大幅降低了 93.37%。值得注意的是,符合国六汽车排放控制标准的 LDDT 的 PN0.1 和 PM0.1 排放系数最低,分别为 4.991×1014 #/km 和 0.627 g/km。通过考虑实际驾驶条件下的排放,我们发现 PN 排放率随着车辆比功率(VSP)的增加而增加。冷启动阶段的 PN 排放量高于热启动阶段,分别是环境空气(1.18×105 #/cm3)的 8590、1890、477 和 22 倍。安装柴油微粒滤清器(DPF)可使 UFP 降低 99.8%以上,而 DPF 再生阶段的 PN 排放系数(1.85×1016 #/km)比 DPF 正常工作时(7.51×1011 #/km)增加了 5 个数量级。金属元素含量分析表明,Fe、Ca、Al 和 Mg 是 LDDT 废气中 UFPs 的主要元素,但镍元素在中国 VI 期略有增加,这可能是由于新型汽车发动机排气歧管采用镍而不是铸铁制造,以获得更高的耐高温性。我们的研究表明了监测和日常维护尾气后处理系统的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Exploring ultrafine particle emission characteristics from in-use light-duty diesel trucks in China using a portable measurement system.

Diesel vehicle exhaust is one of the major contributors to ultrafine particles (UFPs) in urban areas in China. However, there is still a lack of knowledge about UFPs emission characteristics from current in-use diesel vehicles. This study has carried out an on-road test of 10 in-use Light-duty Diesel Trucks (LDDTs) with different emission control standards in China using a self-established portable measurement system based on the Electronic Low-pressure Impactor (ELPI) and characterized the ultrafine particle number (PN) concentration, particle size distribution and metal element contents. The results revealed a significant reduction of 93.37% in the average PN0.1 emission factor of LDDTs from China IV to China VI. Notably, LDDTs compliant with the China VI vehicle emission control standard exhibited the lowest PN0.1 and PM0.1 emission factors, measuring 4.991×1014 #/km and 0.627 g/km, respectively. By taking into account emissions under real driving conditions, we found that the PN emission rates grow with the increase of the Vehicle Specific Power (VSP). The cold-start phase had higher PN emissions than the hot-start phase, with 8590, 1890, 477, and 22 times higher than those of the ambient air (1.18×105 #/cm3), respectively. The installation of Diesel Particulate Filter (DPF) can decrease UFPs by more than 99.8%, while the PN emission factor during the DPF regeneration stage (1.85×1016 #/km) increased by 5 orders of magnitude that of the DPF normal works (7.51×1011 #/km). Metal element contents analysis shows that Fe, Ca, Al and Mg are the dominant elements in UFPs of LDDT exhaust gas, but the element of Ni is slightly increasing in a China VI, possibly due to the new automotive engine exhaust manifolds being made of Ni instead of cast iron for the purpose of having more high-temperature resistance. Our study demonstrates the importance of monitoring and routine maintenance of exhaust after-treatment systems.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Environmental Research
Environmental Research 环境科学-公共卫生、环境卫生与职业卫生
CiteScore
12.60
自引率
8.40%
发文量
2480
审稿时长
4.7 months
期刊介绍: The Environmental Research journal presents a broad range of interdisciplinary research, focused on addressing worldwide environmental concerns and featuring innovative findings. Our publication strives to explore relevant anthropogenic issues across various environmental sectors, showcasing practical applications in real-life settings.
期刊最新文献
Expert-based assessment of chemical and physical exposures, and organizational factors, in past agricultural jobs. Exploring ultrafine particle emission characteristics from in-use light-duty diesel trucks in China using a portable measurement system. Gestational organophosphate esters (OPEs) and executive function in adolescence: The HOME Study. Greenspace Use and Anxiety in Young Adults: The Role of Interoception. Insights into the effects of lanthanides on mammalian systems and potential applications
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1