TY - JOUR
T1 - Effects of sulfur and aromatic contents in gasoline on motorcycle emissions
AU - Yao, Yung Chen
AU - Tsai, Jiun Horng
AU - Chang, An Lin
AU - Jeng, Fu Tien
N1 - Funding Information:
This research was supported by grants from the National Science Council and the Environmental Protection Administration, Taiwan, Republic of China (NSC 94-EPA-Z-006-006 and NSC 95-2221-E-006-172-MY3).
PY - 2008/8
Y1 - 2008/8
N2 - By investigating the effect of sulfur and aromatic contents in gasoline on the criteria pollutant emissions [CO, total hydrocarbons (THCs), and NOx] and on air toxics in the exhaust from a non-catalyst four-stroke motorcycle engine, inferences can be made concerning the effect of fuel composition on motorcycle emissions. The fuels were blended with different contents of sulfur (40 and 150 ppmw) and aromatics (20 and 30 vol%). The data indicate that the sulfur content does not correlate with the emissions of the criteria pollutants from the catalyst free engine. Instead, lowering aromatic content in gasoline reduced the THC emission by over 30%, especially in the cruising test. The NOx emission, however, showed an inverse correlation with the aromatic content in gasoline. While a reduction of aromatic content in gasoline may decrease emissions of benzene and toluene, it will increase the emission of aldehyde. Since the percentage changes of emission factor of THC and air toxics in the motorcycle were larger than those in passenger cars, the benefit of emission reduction due to fuel composition changes in motorcycles may have significant impacts in health risk analysis.
AB - By investigating the effect of sulfur and aromatic contents in gasoline on the criteria pollutant emissions [CO, total hydrocarbons (THCs), and NOx] and on air toxics in the exhaust from a non-catalyst four-stroke motorcycle engine, inferences can be made concerning the effect of fuel composition on motorcycle emissions. The fuels were blended with different contents of sulfur (40 and 150 ppmw) and aromatics (20 and 30 vol%). The data indicate that the sulfur content does not correlate with the emissions of the criteria pollutants from the catalyst free engine. Instead, lowering aromatic content in gasoline reduced the THC emission by over 30%, especially in the cruising test. The NOx emission, however, showed an inverse correlation with the aromatic content in gasoline. While a reduction of aromatic content in gasoline may decrease emissions of benzene and toluene, it will increase the emission of aldehyde. Since the percentage changes of emission factor of THC and air toxics in the motorcycle were larger than those in passenger cars, the benefit of emission reduction due to fuel composition changes in motorcycles may have significant impacts in health risk analysis.
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U2 - 10.1016/j.atmosenv.2008.04.031
DO - 10.1016/j.atmosenv.2008.04.031
M3 - Article
AN - SCOPUS:50849095476
VL - 42
SP - 6560
EP - 6564
JO - Atmospheric Environment
JF - Atmospheric Environment
SN - 1352-2310
IS - 26
ER -