Research Progress on Purification of Hydrocarbons in Diesel Vehicle Exhausts
With the global dieselization of motor vehicles,effective and controllable emissions from diesel vehicle exhaust are on the agenda.Hydrocarbons in diesel vehicle exhaust are due to incompletely burned hydrocarbon substances produced when diesel vehicles operate under lean combustion conditions.These hydrocarbons are harmful to health and environment,which leads to air pollution,ozone formation and dust generation.This paper describes the techniques from oil quality improvement,in-engine device performance optimization to reduce the exhaust emissions.This technique is expensive and has limited improvement capability,so it must be combined with off-board purification aftertreatment techniques.At this stage in the diesel vehicle exhaust mainstream aftertreatment devices are diesel vehicle particulate filters and oxidative catalytic converters,they have slowed down the exhaust emissions to a certain extent,but due to the ease of clogging of the filter cartridges,diesel vehicle exhaust temperatures are much lower,and catalysts are not enough in the low-temperature environment,therefore,low-temperature plasma synergistic catalytic purification technology has been introduced to deal with the HC in the exhaust of the diesel vehicle.
diesel exhausthydrocarbonsdielectric barrier dischargelow temperature plasma
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