Reducing {TAIL ~ temperature differences} within {HEAD ~ the regenerator} of an oxygenate to olefin process 
Reducing { TAIL ~ temperature differences } within { HEAD ~ the regenerator } of an oxygenate to olefin process
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH