Definition of node. 1a : a pathological swelling or enlargement (as of a rheumatic joint)b : a discrete mass of one kind of tissue enclosed in tissue of a different kind.
Diesel exhaust fluid (DEF) from a separate tank is injected into the exhaust pipeline, where the aqueous urea vaporizes and decomposes to form ammonia and carbon dioxide. Within the SCR catalyst, the NO. x are catalytically reduced by the ammonia (NH. 3) into water ( H2O) and nitrogen (N.
Airgas produces AiRx branded Diesel Exhaust Fluid (DEF) and associated equipment solutions in the United States. The American Petroleum Institute (API) provides quality certification of Diesel Exhaust Fluid (DEF) intended for use in SCR-equipped cars and trucks.