Thermal cracking of naphtha yields a gas that is to be separated by a distillation train into the products indicated in Figure 9.52. If reasonably sharp separations are to be achieved, determine by the heuristics of Section 9.4 two good sequences.

Figure 9.52:-

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H, C for Fuel Gas C for Polyethylene C Recycle Cracked Gas Distillation Train Mole Fraction C3 for Polypropylene 1555554 H 0.15 0.23 0.26 0.15 0.10 C Recycle nC4 nC's 0.06 0.04 nC's 0.01 1.00 Figure 9.52 Thermal cracking of naphtha.