| 摘要 |
<p>The system (1) comprises: - a source (5) of a precursor of ammonia; - a conversion device (6) for producing gaseous ammonia from said precursor; - a dosing device (111) for dosing gaseous ammonia to be introduced in the exhaust line (2) upstream from a selective catalytic reduction device (4); - an ammonia storage and release arrangement (10) comprising a first and a second unit (11, 12), each unit including a container (13) containing a material which, depending on the operating conditions, is capable of retaining gaseous ammonia supplied by the conversion device, in order to store gaseous ammonia, and of releasing previously retained gaseous ammonia towards the dosing device; - a control system (32) capable of operating each of the first and second units (11, 12) either in a storage mode or in a release mode.</p> |
