公开(公告)号：US20240115996A1

公开(公告)日：2024-04-11

申请号：US18376117

申请日：2023-10-03

申请人： MARATHON PETROLEUM COMPANY LP

发明人： David C. Rudd ,  Alexander F. Lueker

IPC分类号： B01D53/56 ,  B01D53/76

CPC分类号： B01D53/56 ,  B01D53/76 ,  B01D2251/2062 ,  B01D2257/404 ,  B01D2258/02

摘要： Methods and systems for reducing NOx in a heat generation unit are provided. A method includes introducing an exhaust gas from a catalytic cracking unit to a combustion zone of a heat generation unit to produce a combusted exhaust gas, wherein the exhaust gas contains two or more of carbon monoxide, hydrogen cyanide, ammonia, and nitrogen oxide. The method further includes introducing a sour water stripper (SWS) vapor stream from a SWS unit to the heat generation unit at a location after the combustion zone and before a heat recovery zone of the heat generation unit. The method also includes allowing the SWS vapor stream to react with the combusted exhaust gas to produce a processed exhaust gas with decreased NOx content as compared to the NOx content when the exhaust gas is processed under similar conditions but without an interaction with the SWS vapor stream.