Emission control device for cleaning exhaust gas of vehicle, has permeable film that selectively permeates nitrogen oxide of exhaust gas absorbed in absorption liquid towards storage liquid

摘要

The device has a storage unit (32a) which stores absorption liquid (A) that absorbs nitrogen oxide in exhaust gas. The feeding units (34,36) supply absorption liquid to an outlet passage (22). A storage unit (32b) stores the storage liquid (B) that absorbs nitrogen oxide from absorption liquid. A permeable film (38) is arranged separating the two storage units to selectively permeate nitrogen oxide absorbed in absorption liquid towards the storage liquid.