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