Effect of gasoline/methanol blends on motorcycle emissions: Exhaust and evaporative emissions
Effect of gasoline/methanol blends on motorcycle emissions: Exhaust and evaporative emissions
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DOI：
10.1016/j.atmosenv.2014.11.044
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发表时间：
2015-02
影响因子：
5
通讯作者：
Lan Li;Yunshan Ge;Mingda Wang;Jiaqiang Li;Zihang Peng;Yanan Song;Liwei Zhang
中科院分区：
文献类型：
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作者：
Lan Li;Yunshan Ge;Mingda Wang;Jiaqiang Li;Zihang Peng;Yanan Song;Liwei Zhang
研究了摩托车燃用汽油和M15（汽油体积分数为85%，甲醇体积分数为15%）的排放特性。在底盘测功机上对3辆摩托车在城市行驶循环（UDC）和密封蒸发测定箱（SHED）中的排放和蒸发排放（包括法规和非法规排放）进行了研究。通过废气分析仪直接检测法规排放。非管制排放物，包括羰基化合物，挥发性有机化合物（VOCs）和甲醇，通过电池供电的空气泵使用管涂有2，4-二硝基苯肼（DNPH），Tenax TA和硅胶，分别采样。试验结果表明，与汽油摩托车相比，燃用M15的摩托车尾气排放中总烃（THC）和CO浓度分别降低11%~ 34.5%和63%~ 84%，NOx浓度升高76.9%~ 107.7%。与汽油摩托车相比，M15摩托车BTEX降低16%~ 60%，甲醛增加16.4%~ 52.5%。对于蒸发排放，日损失大于热浸损失，并且以蒸发排放为主。与汽油摩托车相比，燃用M15的摩托车THC、羰基化合物和VOCs的蒸发排放分别增加了11.7%~ 37%、38%~ 45%和16%~ 42%。值得注意的是，甲醇的增长率高达297%-1429%。降低甲醇燃料摩托车的蒸发排放具有重要意义。
The emission characteristics of motorcycles using gasoline and M15 (consisting of 85% gasoline and 15% methanol by volume) were investigated in this article. Exhaust and evaporative emissions, including regulated and unregulated emissions, of three motorcycles were investigated on the chassis dynamometer over the Urban Driving Cycle (UDC) and in the Sealed Housing for Evaporative Determination (SHED), respectively. The regulated emissions were detected by an exhaust gas analyzer directly. The unregulated emissions, including carbonyls, volatile organic compounds (VOCs) and methanol, were sampled through battery-operated air pumps using tubes coated with 2,4-dintrophenylhydrazine (DNPH), Tenax TA and silica gel, respectively. The experimental results showed that, for exhaust emission, compared with those from gasoline fueled motorcycles, the concentration of total hydrocarbons (THC) and CO from motorcycles fueled with M15 decreased by 11%–34.5% and 63%–84% respectively, while the concentration of NOxincreased by 76.9%–107.7%. Compared with those from gasoline fueled motorcycles, BTEX from motorcycles fueled with M15 decreased by 16%–60% while formaldehyde increased by 16.4%–52.5%. For evaporative emission, diurnal losses were more than hot soak losses and turned out to be dominated in evaporative emissions. In addition, compared with gasoline fueling motorcycles, the evaporative emissions of THC, carbonyls and VOCs from motorcycles fueled with M15 increased by 11.7%–37%, 38%–45% and 16%–42%, respectively. It should be noted that the growth rate of methanol was as high as 297%–1429%. It is important to reduce the evaporative emissions of methanol fueling motorcycles.