Ethylene is produced from an ethane rich feed. Variations in the feed
flowrate and ethane composition are expected. It is important to know
whether the existing plant can operate in the feasible region for the
expected deviations. In particular, the questions raised in this work
are how much feed can be processed in the plant and how can plant bott
lenecks be detected in order to increment plant capacity. For a given
feed, the operating conditions of the ethylene plant are evaluated sol
ving a lion linear programming problem. The objective function is the
profit maximization and the feasible region is limited by the design s
pecifications and equipment capacities. Active constraints related to
equipment capacities indicate plant bottlenecks. A numerical example i
s presented for a real ethylene plant where the feed flowrate and etha
ne composition vary within expected ranges. Bottlenecks are detected i
n two sectors of the plant: in the furnaces and in the ethylene-ethane
splitter. Possible solutions to overcome the bottlenecks are also stu
died.