Specific size distributions of elemental and organic carbon, and polycyclic aromatic hydrocarbons emitted from petrol engine using two fuel grades.

Autor: Xu W; Pilot National Laboratory for Marine Science and Technology (Qingdao), 168 Wenhai Middle Road, Jimo District, Qingdao, 266237, China.; National Deep Sea Center, 69 Wenhai Dong Road, Jimo District, Qingdao, 266237, China., Wang F; Pilot National Laboratory for Marine Science and Technology (Qingdao), 168 Wenhai Middle Road, Jimo District, Qingdao, 266237, China. fqwang@qnlm.ac., Wang H; National Deep Sea Center, 69 Wenhai Dong Road, Jimo District, Qingdao, 266237, China., Gao W; National Deep Sea Center, 69 Wenhai Dong Road, Jimo District, Qingdao, 266237, China., Tian X; Qingdao Marine Comprehensive Proving Ground Co., Ltd, 118 Qiyunshan First Road, Jimo District, Qingdao, 266200, China.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2022 Nov; Vol. 29 (53), pp. 80272-80280. Date of Electronic Publication: 2022 Jun 17.
DOI: 10.1007/s11356-022-21451-z
Abstrakt: The most common commercial oils in the Chinese market are two petrol types with octane levels of 93 and 97. To determine the source spectrum of air pollutant emissions, we herein investigated the specific emission sizes of the total suspended particles (TSP), total carbon (TC), elemental carbon (EC), organic carbon (OC), and polycyclic aromatic hydrocarbons (PAHs) from a petrol engine fueled with 93# and 97# petrol in 2016 (based on Chinese national IV gasoline standard). We found that while 93# emitted a higher TSP content, 97# emitted greater TC, EC, OC, and PAHs. The highest carbon contents were found in the < 0.25 µm and 0.44-1.0 µm size fractions for the 93# and 97# petrol, respectively. OC content showed a significant positive correlation with EC, and EC2 (at 740 ℃) was the main carbon fragment in both petrol exhausts. The highest PAH content occurred in the 0.25-0.44 µm size-bin, differing from the results for TC, EC, and OC, and medium molecular weight (4 rings) PAHs were the primary component in the emissions. These results indicate that fuel composition and octane sensitivity have a prominent effect on the size distributions of TC (including EC, OC, and PAHs). Thus, more studies on the carbon content at specific emission sizes in petrol exhaust should be conducted to clarify the main factors impacting these variations.
(© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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