Recycle streams of hydrocarbons and {HEAD ~ CO2} for {TAIL ~ the thermal cracking} can contribute to savings and more efficient use of the feedstock 
for
Recycle streams of hydrocarbons and { HEAD ~ CO2 } for { TAIL ~ the thermal cracking } can contribute to savings and more efficient use of the feedstock
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH