X Location The design variables Unit Min Max
X1 SRC1 The feed of ethylene kmol/h 500 800
X2 SRC2 The feed of oxygen kmol/h 550 850
X3 SRC3 The feed of methane kmol/h 250 450
X4 R1 The number of tubes - 500 900
X5 R1 Reactor length m 20.0 60.0
X6 R1 Reactor temperature K 498 523
X7 SRC4 The feed of water kmol/h 1.00×103 2.00×103
X8 T1 The number of stages - 13 15
X9 SP1 The rate of separation - 0.00100 0.0500
X10 SP2 The rate of separation - 0.00100 0.500
X11 T2 Pressure bar 0.100 0.900
X12 T2 The number of stages - 13 15
X13 T2 The number of feed stages - 10 13
X14 T2 Bottom reflux ratio - 0.0500 1.50
X15 T3 Pressure bar 3.00 7.00
X16 T3 The number of stages - 13 15
X17 T3 The number of feed stages - 10 13
X18 T3 Bottom reflux ratio - 0.500 1.50
X19 T3 Vapor fraction - 0.100 0.700
X20 T4 Pressure bar 0.100 0.900
X21 T4 The number of stages - 13 15
X22 T4 The number of feed stages - 10 13
X23 T4 Bottom reflux ratio - 0.100 1.00
X24 T4 Top reflux ratio - 0.500 2.00