Index

A
Absorption. See also Rectification
mass transfer constraint, 50–53

Activity coefficients, 14

Advanced control, 36

Algorithms for PID controllers, 77

Apparent dead time (ADT),
determination of, 109, 111

Assignable cause variability, 58

B
Backmixing, 46

Backward chaining expert logic
rules, 66–67

Binary distillation columns

inlet streams in, 8–9

McCabe–Thiele model of, 10

Boilup. See also Steam flow rate
manipulation of flow rate to
control material balance
split, 20

pressure drop due to, 46

temperature control with, 38–40

Boilup/feed ratio, use of to set
separation power base, 20

Bottoms

expert system rules and
optimization of, 65–66

flow rate of in manipulated
distillate control scheme,
37

interaction of with distillate
stream, 25–26

light key in, 17

optimization of MRT and quality
of, 60–62
optimization rules when steam
or reflux is constrained,
68

quality measurements, 58

temperature control with flow
rate of, 40

C
Capacitance lag, 36

first-order, 106

Cascade slave control loop

use of in bottoms control
scheme, 40

use of in manipulated distillate
control scheme, 36

use of in reflux control scheme,
38

Closed-loop tuning methodology,
86–90

Column pressure control, 34

Common cause variability, 58

127