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.

在这项研究中，测试了三种使用中的车辆，这些车辆代表了由汽油/生物乙醇混合物（E3和E10）提供燃料的欧III到V车队的排放标准。尽管目前生物乙醇的生产过程受到产量低的限制，并且还依赖大量耕地进行耕种，但是生物乙醇的采用在减少四氢甲烷，一氧化碳，挥发性有机化合物和NMHC排放方面具有优势。结果表明，相比于所有测试的三种燃料的Euro III车辆，Euro IV和V车辆的大多数管制和非管制排放量都低得多。预计使用E10混合燃料（方案C）并结合10％的报废率将实现最大的排放减少。VOCs和OFP的减少率分别为46.1–47.3％和63.4–72.3％，分别为142.0–182.5吨/年和1316。5–1693.6吨/年。结果，这里得出的结论对于制定排放控制策略不仅对决策者很有帮助，该策略不仅可以改善城市和郊区的空气质量，还可以减少车辆排放对人体健康的不利影响。