The speciation of volatile organic compounds (VOCs) from motorcycle engine exhaust at different driving modes
The speciation of volatile organic compounds (VOCs) from motorcycle engine exhaust at different driving modes
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DOI：
10.1016/s1352-2310(03)00177-8
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发表时间：
2003-06-01
影响因子：
5
通讯作者：
Yang, CY
中科院分区：
文献类型：
--
作者：
Tsai, JH;Chiang, HL;Yang, CY
本研究在测功机上调查了不同驾驶模式下摩托车发动机排气中挥发性有机化合物（VOC）的排放情况。 VOC 样品的形态和臭氧形成潜力也分别通过 GC/MS 和最大增量反应性 (MIR) 进行了研究。这项研究对全新和正在使用的摩托车进行了测试。测试的摩托车包括二冲程和四冲程发动机。本研究共鉴定出 48 种 VOC 化合物。仅成功鉴定出具有 C-3-C-9 的 VOC 物种。实验结果表明，异戊烷、甲苯、间对二甲苯、正戊烷、2-甲基戊烷、3-甲基戊烷、苯、正庚烷和甲基庚烷是摩托车发动机尾气中的主要VOC形态。在用二冲程摩托车全周期VOC排放量是新型二冲程摩托车的5倍，在用四冲程摩托车是新型四冲程摩托车的15倍。怠速和减速阶段的VOC形态浓度高于加速和巡航模式。但由于摩托车发动机容积效率变化不一致，测功机测试的各种驾驶模式下VOCs排放率不够精确。这些数据显示了各种驾驶模式下明显不同的 VOC 排放率。此外，烷烃和芳烃是摩托车发动机排气中的主要VOC形态群。四种类型摩托车的VOCs含量占THC的23%至76%。在新摩托车和在用摩托车中发现 VOC/THC 存在很大差异。二冲程发动机的臭氧形成潜力高于四冲程发动机。使用中的摩托车的臭氧形成潜力也明显高于新摩托车。 (C) 2003 Elsevier Science Ltd. 保留所有权利。
This study investigated the emissions of volatile organic compound (VOC) from motorcycle engine exhaust at different driving modes on a dynamometer. The speciations and the ozone formation potential of VOC samples also had been investigated by GC/MS and maximum increment reactivity (MIR), respectively. Both brand new and in-use motorcycles were tested in this study. The tested motorcycles include 2-stroke and 4-stroke engines. There are totally 48 VOC compounds identified in this study. Only the VOC species with C-3-C-9 were identified successfully. Experimental results indicated that isopentane, toluene, m, p-xylene, n-pentane, 2-methylpentane, 3-methylpentane, benzene, n-heptane and methylheptane were the major VOC speciations in the motorcycle engine exhaust. The amount of VOC emissions of the in-use 2-stroke motorcycles was 5 times that of the new 2-stroke motorcycles and the in-use 4-stroke motorcycles was 15 times that of the new 4-stroke motorcycles during the whole cycle. The amount of VOC speciation concentration during idle and deceleration stages was higher than those during the acceleration and cruising modes. However, the emission rate of VOCs at various driving modes tested on a dynamometer had not been precised enough due to the inconsistent variation of volume efficiency of motorcycle engine. These data shows a clear distinct emission rate of VOC at various driving modes. Besides, alkanes and aromatics were the major VOC speciation groups in the, motorcycle engine exhaust. The amount of VOCs contributed from 23% to 76% THC for the four types motorcycle. Great variation of VOC/THC were found among new and in-use motorcycle. The ozone formation potential of a 2-strokes engine was higher than that of a 4-stroke engine. The ozone formation potential of in-use motorcycles were also clear higher than those of new motorcycles. (C) 2003 Elsevier Science Ltd. All rights reserved.