捷克不同技术条件下高里程石油气汽车的比较:颗粒结合的多环芳烃

IF 3.8 Q2 ENVIRONMENTAL SCIENCES Atmospheric Environment: X Pub Date : 2024-08-01 DOI:10.1016/j.aeaoa.2024.100294
Libor Špička, Adam Poul, Jiří Huzlík, Martina Bucková, Jitka Hegrová, Roman Ličbinský
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引用次数: 0

摘要

与汽油相比,液化石油气(LPG)在文献中被认为是一种受管制和不受管制排放较低的运输燃料。本文对四辆里程数较高(超过 20 万公里)的常用乘用车和一辆新车进行了实际排放测量。目的是比较以液化石油气和汽油为双燃料的乘用车中颗粒结合的多环芳烃(PAHs)的排放因子,或者说是比较两种燃料的排放因子。多环芳烃的浓度是通过气相色谱法测定的,其依据是在实际交通行驶过程中对废气进行等速采样时在过滤器上捕获的颗粒分析。就所分析的 8 种最有害的多环芳烃的总和而言,在所分析的车辆中,只有两辆车的总排放系数(总和)与汽油相比分别降低了 22% 和 26%。其余车辆的总排放系数增加了 4.4% 至 68.8%。结果表明,就颗粒状多环芳烃而言,在实际测试中,石油气燃料对车辆排放的好处可能并不那么明显,这在很大程度上取决于车辆是否安装了合适的推进系统、系统的设置方式以及车辆的维修方式(即车辆的整体状况)。
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Comparison of high mileage LPG cars in different technical condition in Czechia: Particle-bound PAHs

Liquefied petroleum gas (LPG) is represented in the literature as a transport fuel with lower regulated and non-regulated emissions compared to petrol. For the purpose of this paper, real-world emissions measurements were performed on a random sample of four commonly operated passenger vehicles with higher mileage (over 200 thousand km) and on a new one. The aim is to compare the emission factors of particle-bound polycyclic aromatic hydrocarbons (PAHs) in dual-fuelled passenger cars running on LPG and petrol, or rather to compare the emission factors of the two fuel types. PAH concentrations are determined by gas chromatography based on the analysis of particles captured on a filter during isokinetic sampling of the exhaust gas during driving in real traffic. In terms of the sum of the 8 most hazardous PAHs analysed, LPG fuelling reduced the total (summary) emission factor of only two of the vehicles analysed, by 22% and 26% respectively compared to petrol. For the remaining vehicles, there was an increase in the total emission factor ranging from 4.4 to 68.8%. The results show that in terms of particle-bound PAHs, the benefit of LPG fuel in terms of vehicle emissions may not be so clear-cut in real-world tests and it depends very much on whether a suitable propulsion system is fitted to the vehicle, how it is set up and how the vehicle is serviced (i.e. the vehicle overall condition).

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来源期刊
Atmospheric Environment: X
Atmospheric Environment: X Environmental Science-Environmental Science (all)
CiteScore
8.00
自引率
0.00%
发文量
47
审稿时长
12 weeks
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