基于MOVES分析汽油组分对机动车的污染排放影响

Analysis on Impact of Gasoline Components on Motor Vehicle Emissions Based on MOVES

选取西安市轻型客车为研究对象,利用MOVES移动源排放模型,结合实测数据,模拟计算各汽油组分对轻型客车污染排放因子的影响。经过测算,得知硫含量和雷德蒸汽压对CO和HC的排放敏感性较强,汽油中硫含量由500×10-6降至10×10-6可令CO的排放降低47.25%,HC的排放降低49.13%,而雷德蒸汽压由14 psi降至8 psi可令CO减排36.41%,HC减排13.17%,而芳烃含量只对CO敏感,芳烃含量由50%降至20%可令CO的排放降低17.61%,而烯烃含量由10%增加到22%令NOx和CO的排放分别增加了4.46%,3.42%,而HC的排放降低了2.19%,四项指标对于PM的排放均影响甚微,对CO2的排放则无影响。

Taking light-duty vehicles in Xi’an city as the research object, combined with measurement data, effect of gasoline components on emission factor was simulated by MOVES. The results show that sulphur content and Reid vapor pressure are very sensitive to the emissions of CO and HC; the decrease of sulphur content from 500×10-6 to 10 ×10-6 can reduce CO and HC emission by 47.25% and 49.13%, respectively; the decrease of Reid vapor pressure from 14 psi to 8 psi can reduce CO and HC emission by 36.41% and 13.17%, respectively; the aromatic content is only sensitive to the emissions of CO, and the decrease of aromatic content from 50% to 20% can reduce emission of CO by 17.61%; the increase of olefin content from 10% to 22% can reduce emission of HC by 2.19%, while can increase the emission of NOx and CO by 4.46% and 3.42%; all of four effect factors can slightly affect emissions of PM, and have no effect on CO2 emission.