Distillation is an ancient unit operation, and has been widely practiced for tho

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Distillation is an ancient unit operation, and has been widely practiced for thousands of years Distillation is a process of physically separating a mixture into two or more product that have different boiling points, by preferentially boiling the more volatile components out of the mixture When a liquid mixture of two volatile materials is heated, the vapor that comes off will have a higher concentration of the more volatile material than the liquid from which it was evolved Conversely, if a vapor is cooled, the less volatile material has a tendency to condense in a greater proportion than the more volatile material. The commercial process simulators contain a range of distillation models with different degrees sophistication. The design engineer must choose a model that is suitable for the purpose, depending on the problem type, the extent of design information available and the level of detailed required in the solution. In some cases, it may make sense to build different versions of the flow- sheet, using different level of detail in the distillation model, so that the simpler model can be used to initialize a more detailed model. Study each type of distillation column that are available in Aspen PLUS based on their usage and purpose Model in Aspen PlusDescriptionPurposeUse Problem statement

Explanation / Answer

problem

statement

to find out vapor and liquid composition

dont have reboiler, condenser

vapor formation because of reduction in pressure

only 1 stage

petrolium industry

before Atmospheric distillation Unit

simple to use ,

to get initial approximation of data before going to rigorious simulation

To find minimum reflux ratio

number of stage

feed plate location

reboiler, condenser duty

for fully detail process study of distillation have more information

at every plate composition, pressure, temperature.

can be used for actual process simulation after short cut simulation

(case study)

optimization problem

to simulate crude distillation tower

having multi components mixture

to get composition , of stream, flow rates

for more than one side stream

in petrolium industry

case study change in feed compostion and duty

model description purpose use

problem

statement

flash distillation

to find out vapor and liquid composition

dont have reboiler, condenser

vapor formation because of reduction in pressure

only 1 stage

to find equlibrium composition, flow rate of vapor, liquid.

petrolium industry

before Atmospheric distillation Unit

binary mixture of propane, butane, pentane separation shortcut column

simple to use ,

to get initial approximation of data before going to rigorious simulation

To find minimum reflux ratio

number of stage

feed plate location

reboiler, condenser duty

to get initial approximation of data before going to rigorious simulation separation of 2, multi componets mixture distillation column

for fully detail process study of distillation have more information

at every plate composition, pressure, temperature.

for detailed simulation

can be used for actual process simulation after short cut simulation

(case study)

optimization problem

effects of change in number of plates on duty for specific outlet stream crude distillation unit

to simulate crude distillation tower

having multi components mixture

to get composition , of stream, flow rates

for more than one side stream

in petrolium industry

case study change in feed compostion and duty

separation of crude oil

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