LAUSR

Abstract In this study, three in-use vehicles representing the emission standards for the Euro III to V fleets fueled by gasoline/bioethanol blends (E3 and E10) were tested. Although the production process of bioethanol is currently constrained by its low yield and also relies on considerable amounts of arable land to cultivate, but the adoption of bioethanol has an advantage in reducing THC, CO, VOCs and NMHC emissions. The results show most of the regulated and unregulated emissions are much lower for the Euro IV and V vehicles compared to Euro III vehicle for all the three fuels tested. The largest reduction in emissions was predicted to occur when the E10 fuel blend was employed (Scenario C) in conjunction with a 10% scrappage rate. The reduction rate of VOCs and OFP was 46.1–47.3% and 63.4–72.3%, respectively, equating to 142.0–182.5 ton/year and 1316.5–1693.6 ton/year. As a consequence, the conclusions drawn here were very helpful for policy-makers in terms of establishing emission control strategies that not only improve urban and suburban air quality but also reduce the adverse influence of vehicle emissions on human health.