A

separation work

A

stationary point of bond chain

A

vertex of product simplex

B

bottom stream (flow rate), kmol/sec

C ^{( k)}

k-component boundary element of concentration simplex

C _n

concentration simplex for n-component mixture

d

dimension of trajectory bundle

D

overhead stream (flow rate), kmol/sec

E

entrainer stream (flow rate), kmol/sec

F

feed stream (flow rate), kmol/sec

h

enthalpy of liquid, kJ/kg or kcal/kg

H

enthalpy of vapor, kJ/kg or kcal/kg

h

heave key component

i _D : i _B

split in column ( i _D and i _B components of overhead and bottom products respectively)

i : j

split in section ( i and j present and absent component of section product or pseudoproduct respectively)

K

equilibrium ratio

k

number of product components at sharp distillation

k

key component

k

key stationary point (pseudocomponent)

equilibrium ratio of component j at infinite dilution

K ^t

equilibrium ratio in tear-off point

l

light key component

L

liquid stream (flow rate), kmol/sec

m

number of product components at sharp distillation

m

number of stationary points of bond chain

n

number of components in a mixture

N

number of equilibrium stages

N ⁺ or N ^?

stable or unstable node respectively

or

stable or unstable node of overhead boundary element...