A process and {HEAD ~ a device} for reducing {TAIL ~ the nitrous oxide} which is formed during the catalytic combustion of ammonia and oxygen to form nitrogen oxides 
for reducing
A process and { HEAD ~ a device } for reducing { TAIL ~ the nitrous oxide } which is formed during the catalytic combustion of ammonia and oxygen to form nitrogen oxides
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH