Ammonia generation and storage systems and methods

A method of reducing nitrogen oxides in exhaust, the method comprising:

• receiving into a first exhaust conduit, a first exhaust stream including first nitrogen oxides from a first engine;
• receiving into a second conduit, a second exhaust stream including second nitrogen oxides from a second engine;
• directing at least a portion of the second exhaust stream through an exhaust treatment device;
• generating ammonia by converting at least a portion of second nitrogen oxides in the second exhaust stream into ammonia;
• directing at least a portion of the generated ammonia into an ammonia storage device including a storage material;
• storing at least a portion of the generated ammonia in the ammonia storage device;
• releasing at least a portion of the stored ammonia from the storage material;
• and
• directing the released ammonia to a catalytic converter to reduce the first nitrogen oxides in the first exhaust stream.

An ammonia generation and storage system comprising:

• a first exhaust conduit configured to be connected to and receive a first exhaust stream from a first engine;
• a second exhaust conduit configured to be connected to and receive a second exhaust stream from a second engine;
• an exhaust treatment device fluidly coupled to the second exhaust conduit downstream of the second engine and configured to convert at least a portion of nitrogen oxides in the second exhaust stream into ammonia;
• and
• an ammonia storage device fluidly coupled to the second exhaust conduit, the ammonia storage device configured to receive and store in a storage material at least a portion of the converted ammonia as stored ammonia.