VEHICLE AND METHOD OF TREATING AN EXHAUST GAS

摘要

A method of treating an exhaust gas produced by a vehicle internal combustion engine includes conveying the gas through a first reactor including a non-thermal plasma. The gas includes nitric oxide and is transitionable between a first condition in which the gas has a cold-start temperature that is less than or equal to about 150° C., and a second condition in which the gas has an operating temperature that is greater than about 150° C. During the first condition, the method includes contacting the gas and plasma to oxidize the nitric oxide to nitrogen dioxide and form an effluent that includes nitrogen dioxide. The method includes concurrently conveying the effluent through a second reactor including a diesel oxidation catalyst, and storing the nitrogen dioxide within the second reactor during only the first condition. The method includes, after storing, releasing nitrogen dioxide from the second reactor during only the second condition.

主权项

1. A method of treating an exhaust gas produced by a vehicle internal combustion engine, the method comprising:
conveying the exhaust gas through a first reactor that includes a non-thermal plasma and is disposed adjacent to and in fluid communication with the vehicle internal combustion engine, wherein the exhaust gas includes nitric oxide and is transitionable between:
a first condition in which the exhaust gas has a cold-start temperature that is less than or equal to about 150° C.; anda second condition in which the exhaust gas has an operating temperature that is greater than about 150° C.; during the first condition, contacting the exhaust gas and the non-thermal plasma to thereby oxidize the nitric oxide to nitrogen dioxide and form a first effluent gas that includes nitrogen dioxide; conveying the first effluent gas through a second reactor that includes a diesel oxidation catalyst and is disposed adjacent to and in fluid communication with the first reactor; concurrent to conveying, storing the nitrogen dioxide within the second reactor during only the first condition; and after storing, releasing the nitrogen dioxide from the second reactor during only the second condition.