- #Unisim design suite Pc#
- #Unisim design suite free#
The percentage of catalyst activity is now better related to the amount of sulfur recovery.
Due to the change of reaction model for the Claus Reactor, a new model for predicting performance due to catalyst aging has been developed. With the new reaction model, the performance of the SRU sulfur recovery and the amounts of H2S and SO2 in the tail gas are predicted in a more realistic range. A more accurate version of the Claus Reactor calculation is included. #Unisim design suite free#
It is a combination of Gibbs Free Energy equilibrium calculation for those compounds which will thermally reach equilibrium conversion and other compounds like CS2 and COS which depend on the furnace residence time. In the Furnace calculation a constrained GFEM method has been developed based on the original correlation method.This allows the SRU to calculate the optimum amount of air supply for the best performance of the SRU for sulfur recovery and residual H2S and SO2 amounts in the tail gas. An enforced Tail Gas H2S / COS fixed ratio calculation has been added.Users can introduce Sweep Air feed/product to the Sulfur-Pit operation, enabling the purity of the sulfur product to be studied.The single Burner operation in the SRU is expanded into a two-stage furnace operation.The SRU has been extended to handle both Acid Gas and Sour Water Stripping Gas.Several significant improvements have been made to the SRU: Unit Operations Sulfur Recovery Unit (SRU) Improved parameter tuning for the Melamine Process.Optimized algorithm to improve the flash speed and stability.The NRTL Electrolyte model was enhanced with the following features: All Twu parameters now accessible via OLE.Ī new model option was implemented in the PR-Twu property package to enable use of Wilson’s API-Sour method.
#Unisim design suite Pc#
PR-Twu specific package variables introduced to separate the package parameters Twu Tc, Pc from the standard component Tc, Pc. PR-Twu Tc and Pc now defaults to the Component values. Alternative Tc, Pc, and Acentricity for components for use in the PR-Twu FP are included. Updated internal generalized method for calculating L,M, and N from Tc and acentric factor. Updated and Expanded PR-Twu L,M,N parameter database parameter values based on Jaubert (2018) and Bell(2018) tables. With the Prausnitz-Shair calculation option for the Henry coefficients, users now have the possibility to use the Legacy method for a given component’s Henry’s coefficients, thus providing greater flexibility. With this flash solver, all the common components can be formed as solids, if they have the necessary solid properties.Įnhancement of Henry's Constant handling for Activity Models There is now a new flash solver in UniSim Thermo that can handle vapor-liquid-liquid-solid phase equilibrium. General Flash for Solid Phase Equilibrium These values are updated in both Steady State and Dynamic simulations. Furthermore, CO2 freeze-out is reported in the profile results of the pipe segment. Users can add a new stream property to calculate and display the amount of CO2 freeze-out in material streams. Identify and flag conditions for the formation of solid CO2 in the stream and inside pipe segments Span-Wagner is for pure CO2 systems, and EOS-CG is for rich-CO2 mixtures. UniSim Design now includes the Span-Wagner and EOS-CG property packages, targeted at CO2 capture and storage applications (CCS). Span-Wagner and EOS-CG Property Packages for CCS For new cases the new improved BIPs are used by default in R480. This improves the calculation of dehydration unit performance including water content of saturated natural gas. The Glycol Package Binary Interaction Parameters (BIPs) were improved based on wider experimental and engineering data. 
Thermodynamics Glycol Package Enhancements UniSim Design Suite R480 includes enhancements in several areas.
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