PROCESSES AND APPARATUS FOR QUANTITATIVELY CONVERTING UREA TO AMMONIA ON DEMAND

摘要

Process and apparatus for quantitatively converting urea toammonia-on demand are disclosed. One process includes the steps of:receiving a demand rate signal for ammonia; feeding reactants including ureaandwater into a reactor to provide a reaction mixture; and controllingtemperature andpressure in the reactor to produce a gaseous product stream including ammoniaand carbon dioxide at substantially constant concentrations. Another processincludes the steps of: feeding molten urea or solid urea to a reactor; feedingwater(liquid or steam) to the reactor; and reacting the urea and water at elevatedtemperature and pressure to form a gaseous product stream including ammoniaandcarbon dioxide.