Further, at 204 {TAIL ~ the catalyst temperature} may be maintained between {HEAD ~ the first temperature threshold} T1 and a second temperature threshold T2 
Further , at 204 { TAIL ~ the catalyst temperature } may be maintained between { HEAD ~ the first temperature threshold } T1 and a second temperature threshold T2
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH