论文部分内容阅读
一、我国机动车排放现状机动车排放已成为我国空气污染的重要来源,是造成灰霾、光化学烟雾污染的重要原因,机动车污染防治的紧迫性日益凸显。目前,国内除一些一二线大城市的市内公交车辆已更换为天然气燃料或电力发动机外,几乎所有重型货运车辆、长途客运车辆、农用车、公交车等均为柴油驱动。此外,国内尚有相当数量的柴油私家车。柴油车的排气黑烟是一种聚合物,85%以上是碳,还有少量的氧、氢、灰分和一系列多环芳香烃化合物,黑烟有臭味并会形成烟雾。
First, the status quo of motor vehicle emissions in China Motor vehicle emissions have become an important source of air pollution in our country is caused by haze, photochemical smog pollution is an important reason for the increasingly prominent urgency of vehicle pollution prevention and control. At present, almost all heavy-duty freight vehicles, long-distance passenger vehicles, agricultural vehicles, buses and the like are diesel-powered, except that some city buses in the first and second tier cities have been replaced with natural gas fuel or electric engines. In addition, there are still a considerable number of diesel private cars in China. Diesel exhaust black smoke is a polymer, more than 85% of carbon, but also a small amount of oxygen, hydrogen, ash and a series of polycyclic aromatic hydrocarbons, stench and smoke will form.