The existing styrene production facility can include {TAIL ~ separation apparatus} to remove at least a portion of any benzene from the new product stream, an alkylation reactor to form ethylbenzene by reacting the benzene with {HEAD ~ ethylene}, and a dehydrogenation reactor to form styrene by dehydrogenating ethylbenzene 
The existing styrene production facility can include { TAIL ~ separation apparatus } to remove at least a portion of any benzene from the new product stream , an alkylation reactor to form ethylbenzene by reacting the benzene with { HEAD ~ ethylene } , and a dehydrogenation reactor to form styrene by dehydrogenating ethylbenzene
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