More particularly, this invention relates to controlling the reaction process to maintain {HEAD ~ a partial pressure velocity compensation factor} of {TAIL ~ at least 0.1 psia−1hr−1} such that a prime olefin selectivity of at least 45 wt % can be maintained 
More particularly , this invention relates to controlling the reaction process to maintain { HEAD ~ a partial pressure velocity compensation factor } of { TAIL ~ at least 0.1 psia−1hr−1 } such that a prime olefin selectivity of at least 45 wt % can be maintained
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH