DWSIM is an open-source chemical process simulator written in VB.NET, with advanced thermodynamic calculations, reactions support, petroleum characterization / hypothetical component generation tools and a fully-featured graphical user interface.

Features:

• Process Flowsheet Diagram (PFD) drawing Interface
• VLE calculations using Equations of State, Activity Coefficient and Chao-Seader models
• Characterization of Petroleum Fractions using bulk properties and/or ASTM/TBP distillation curves and creation of Hypothetical Components using UNIFAC groups
• Rigorous Distillation/Absorption Column models
• Support for Chemical Reactions and Reactors
• Supports ChemSep´s Component Database
• Multivariate Optimization and Sensitivity Analysis utility