
Prode Properties Properties of pure fluids and mixtures, multiphase equilibria, process simulation


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Excel application example : solve a distillation column
With Prode Properties you can easily solve staged columns with one or more feeds and one or more side streams, this Excel application example shows how to specify inputs and print in Excel a detailed table with results
Load the predefined Excel page, specify the problem and get the results
From Excel menu File>open , in Excel folder (in Prode Properties installation) select the file column.xls
In this page you can define different kind of columns, distillation columns with reboiler and condenser, absorbers etc. with one or more feeds and one or more side streams.
The steps to define a column are easy to follow :
 define the number of stages
 define pressure distribution (button and top stage)
 define stage efficiency
 define the number of feeds, each feed flow rate and compositions (click on the proper Feed button to access the stream editor), each feed stage (remember that reboiler (if present) is stage 1 and condenser (if present) is stage N, and the liquid fraction per each feed (good practices suggest to adopt a value near 1)
 Define the number of side streams (if any) , the stage, the type (vapor or liquid flow) and the flow specification
 Define variables as condenser and reboiler and the related specifications, the procedure allows different specifications including the molar fraction of a component in top or bottom stage
To edit / modify a feed just click on the related feed's button to access the stream's editor
Once the column has been defined it is suggested to verify the input data specifically for inconsistent specifications, if you are sure that all is Ok run the solver (button Solve Column)
The procedure prints a detailed report which includes :
the verified errors in mass and energy balance
reboiler and condenser duties
temperature and pressure in each stage
total and component vapor flows in each stage
total and component liquid flows in each stage
This example shows how Properties can be useful in everyday work, it permits to solve rigorously, easily and quickly many different problems within your preferred applications.
Technical features overview (Windows version)
 Entirely written in C++, Microsoft MFC provides Microsoft Windows functionalities.
 Up to 100 different streams with up to 50 components per stream (user can redefine)
 Several compilations of chemical data and BIPs are available, the user can add new components and BIPs
 Proprietary compilation with data on more than 1500 chemicals and 25000 BIPs
 flexible database format (support for up to 30 different correlations) works with all majour standards including DIPPR.
 Comprehensive set of thermodynamic models, base version includes
 Regular
 Wilson
 NRTL
 UNIQUAC
 UNIFAC
 SoaveRedlichKwong (standard and extended version with parameters calculated for best fitting of vapor pressure, density and enthalpy)
 PengRobinson (standard and extended version with parameters calculated for best fitting of vapor pressure, density and enthalpy)
 Benedict Webb Rubin (Starling) BWRS
 Steam Tables IAPWS 95
 ISO 18453 (GERG 2004)
 ISO 20765 (AGA model)
 LeeKesler (Plocker) LKP
 Cubic Plus Association (SRK and PR variants)
 Hydrates (Cubic Plus Association, Van Der WaalsPlatteeuw)
 additional models as Pitzer, NRTL for electrolyte solutions, PC SAFT (with association contribute), GERG (2008) etc. available in extended versions.
 van der Waals and complex mixing rules (Huron Vidal, Wong Sandler etc.)
 Base and Extended (to fit experimental data) EOS parameters.
 Selectable units of measurement
 Procedure for solving single phase, two phase, multiphase fluid flow
 Procedure for solving staged columns
 Rigorous solution of distillation columns, fractionations, absorbers, strippers...
 Procedure for calculating temperature / pressure formation of gas hydrates
 hydrate phase equilibria based on Cubic Plus Association and Van Der WaalsPlatteeuw models
 Procedure for solving polytropic compression with phase equilibria
 Huntington method for gas phase
 Proprietary method for solving a polytropic process with phase equilibria
 Procedure for solving isentropic nozzle (safety, relief valve with single and two phase flow)
 HEM, Homogeneous Equilibrium
 HNEDS, Homogeneous Nonequilibrium
 NHNE, Nonhomogeneous Nonequilibrium
 Procedure for simulating fluid flow in piping (pipelines) with heat transfer
 Beggs and Brill and proprietary methods for single phase and multiphase fluid flow with heat transfer
 Procedure for fitting BIP to measured VLE / LLE / SLE data points (data regression)
 Procedure for fitting BIP to VLE values calculated with UNIFAC
 Functions for simulating operating blocks (mixer, gas separator, liquid separator) **
 Functions for accessing component data in database (the user can define mixing rules)
 gas / vaporliquidsolid fugacity plus derivatives vs. temperature pressure composition
 gas / vaporliquidsolid enthalpy plus derivatives vs. temperature pressure composition
 gas / vaporliquidsolid entropy plus derivatives vs. temperature pressure composition
 gas / vaporliquidsolid molar volume plus derivatives vs. temperature pressure composition
 Flash at Bubble and Dew point specifications and P (or T)
 Flash at given temperature (T) and pressure (P) multiphase vaporliquidsolid, isothermal flash
 Flash at given phase fraction and P (or T), solves up to 5 different points
 Flash at given enthalpy (H) and P multiphase vaporliquidsolid, includes adiabatic flash
 Flash at given enthalpy (H) and T multiphase vaporliquidsolid, includes adiabatic flash
 Flash at given entropy (S) and P multiphase vaporliquidsolid, includes isentropic flash
 Flash at given entropy (S) and T multiphase vaporliquidsolid, includes isentropic flash
 Flash at given volume (V) and P multiphase vaporliquidsolid, includes isochoric flash
 Flash at given volume (V) and T multiphase vaporliquidsolid, includes isochoric flash
 Rigorous (True) critical point plus Cricondentherm and Cricondenbar
 Complete set of properties for different states
 gas / vaporliquidsolid density
 gas / vaporliquid Isobaric specific heat (Cp) and Isochoric specific heat (Cv) plus cp/cv
 Gas heating value
 Gas Wobbe index
 Gas Specific gravity
 gas / vaporliquid Joule Thomson coefficients
 gas / vaporliquid Isothermal compressibility
 gas / vaporliquid Volumetric expansivity
 gas / vaporliquid Speed of sound
 gas / vaporliquid Viscosity
 gas / vaporliquidsolid Thermal conductivity
 gas / vapor compressibility factor
 liquid Surface tension
Typical applications
 Fluid properties in Excel, Matlab and other Windows and UNIX (**) applications
 Thermodynamics, physical, thermophysical properties
 Process simulation
 Heat / Material Balance
 Process Control
 Process Optimization
 Equipment's Design
 Separations
 Instrument's Design
 Realtime applications
 petroleum refining, natural gas, hydrocarbon, chemical, petrochemical, pharmaceutical, air conditioning, energy, mechanical industry


Perspective users are invited to contact Prode for discussing the applications of Prode Properties


