The method 1 further comprising regenerating {HEAD ~ the cerium promoted zeolite catalyst} to {TAIL ~ a predetermined level} to form a regenerated cerium promoted catalyst 
to
The method 1 further comprising regenerating { HEAD ~ the cerium promoted zeolite catalyst } to { TAIL ~ a predetermined level } to form a regenerated cerium promoted catalyst
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH