Patent ID: 6331281
Filing Date: 2001-12-18
Classification: B01D,Y02A

Abstract:
A process for cleaning ammonia-containing exhaust gas comprising the steps of:bringing an exhaust gas containing ammonia into contact with at least one train of an ammonia decomposition catalyst under heating to decompose the ammonia into nitrogen and hydrogen;bringing a resultant mixed gas from the ammonia decomposition catalyst into contact with at least one train of an ammonia adsorbent to adsorb undecomposed ammonia remaining in the exhaust gas; andbringing at least one of an inert gas and a part of a purged gas generated by cleaning the exhaust gas into contact with the ammonia adsorbent under heating to regenerate the ammonia adsorbent while bringing a reproduced exhaust gas containing ammonia desorbed from the ammonia adsorbent into contact under heating with at least one of said ammonia decomposition catalyst and another ammonia decomposition catalyst under heating so as to clean the reproduced exhaust gas containing the ammonia desorbed from the ammonia adsorbent.