INTERMITTENT APPLICATION OF SYNGAS TO NOX TRAP AND/OR DIESEL ENGINE

摘要

A catalytic partial oxidizer ( 30 ) provides syngas (hydrogen and carbon monoxide) to an apparatus intermittently using syngas such as valves ( 34 ) feeding NOx traps ( 35 ), for brief periods of time. During turndown times when syngas is not being used, either the output of the CPO is diverted ( 33 ) to the inlet ( 13 ) of an engine ( 12 ) through the engine gas recycle (EGR) system ( 43-46 ), or the amount of fuel ( 19 ) and exhaust ( 23 ) applied to the CPO is reduced ( 24, 26; 59, 60 ) so that the CPO merely stays warm and in a reduced state, thereby being ready to restart immediately. A mini-CPO ( 62 ) may provide syngas and heat to the major CPO ( 30 ) during the turndown time when syngas is not being used by the NOx traps.