DWSIM /Download and Installation
• DWSIM is Free and Open source software.
• It has great capabilities to solve.complex chemical engineering problems.
• It will be a new skill to showcase on your CV.
To download and install this program just click on the link:
https://dwsim.inforşide.com.br/new/
Multicomponent Distillation
To separate equal wt% of feed mixture of Benzene, Toluene,Xylene into 3 streams each at least 99.9 wt% pure by selecting of better process sequence out of the following configuration at R/Rmin - 1.28 and 1.12 for both column respective.
1 ) Sequence 1 :
Remove Xylene from the bottom of the 1st column then separate
Benzene and Toluene from 2nd column .
2 ) Sequence 2 :
Remove Benzene from the 1st column then separate Toluene & Xylene from 2nd column . Feed condition: Temperature = 110 ° C , P = 1 atm.
Total flow = 2000 kg/hr
Results and comment on your answer based on heat load .
Learning objectives
>Basic understanding of CSTR.
>Mole balance Derivation.
> Simulation of CSTR in DWSIM to find volume of reactor for a given conversion.
Background
Homogeneous liquid phase reactions, gas-liquid phase reactions.
Well mixed, so properties like temperature, density is constant.
Good Temp control.
Low conversion.
Dead zones may occur.
Reactants can by-pass.
Background
Hydrogen is one of the main intermediate products largely utilized in
oil and petrochemical industries.
• It is used as a raw material and obtained in some processes as a by-product.
• The off-gas streams contain considerable amount of hydrogen, which are
mostly incinerated in refinery flares as a waste gas.
>Hydrocarbons are converted into hydrogen reformers in order to produce
the hydrogen needed for hydrogen consuming processes.
>Separation of hydrogen from an existing refinery off-gas stream
represents an opportunity to achieve significant cost reductions in refineries
>Cryogenic Technology (CT)
Separation principle:
Cryogenic technology is based on the difference in the relative
component volatility at low temperatures.
Disadvantages:
Extra compressors to increase the pressure at least 20 bar. CO2 separation
is necessary to avoid freezing the CO2 in line at low temperatures.
How to make flash calculation in Hysys.Flash evaporation is one of the simplest unit operation that
separates components into liquid and
vapor phased on relative volatility.
Learning Objective
How to obtain saturated steam properties in HYSYS
Background
The temperature window for saturated steam is up
to critical point of water that is 373.94 °C. So the
saturated steam table will be between 100 °C to 373 °C.
HYSYS property packages:
ASME Steam (1967)- Outdated NBS Steam (1984)-
higher pressure range up to 10000 bar and 2000 K.
Problem statement Calculate
the saturated steam properties from 100°C to 373°C. Create a table that shows pressure, molar enthalpy and molar entropy.
Learning Objective
Bubble point and dew point of pure components.Bubble point and dew point of mixtures
Bubble Point: The bubble point is the point at which the first
drop of a liquid mixture begins to vaporize.
Dew Point: The dew point is the point at which the first vapor
of a gaseous mixture begins to condense.
