Non ratio Constraints

RHS (ton/day)

Marginal value ($/t)

MRTS M C 1 , k

Elasticity E C 1 , k

HDS feed rate (H1)

1720

65

−0.790

−0.105

HCCS production (F4)

720

60

−0.094

−0.005

LCO production (F5)

600

64

−0.051

−0.002

VACRES & VR tank (B1)

324

79

−1.400

−0.002

Alkylation feed rate (A1)

504

134

0.000

0.000

VGO production (G1)

1080

16.9

0.005

0.063

Ratio Constraints

RHS

Marginal value ($/˚C or ppm/t)

MRTS M C 1 , k

Elasticity E C 1 , k

CDU HGO initial cut point (P2)

305˚C

0.04

−11.49

−0.091

FCC preheat (P3)

210˚C

0.02

−0.001

−0.044

VGO HDS sulfur target (P4)

0.4 %wt

2.14

−0.016

−0.001