Interactive example notebooks for PathSim-Chem.

Chemical Engineering

Activity Coefficients

Simulating how NRTL activity coefficients for the ethanol-water system evolve with temperature using PathSim blocks and connections.

Continuous Stirred-Tank Reactor

Simulating the startup transient of an exothermic first-order reaction in a cooled CSTR, showing the dynamic interaction between concentration decay and temperature rise.

Counter-Current Heat Exchanger

Simulating the startup transient of a counter-current shell-and-tube heat exchanger, showing how temperature profiles develop along the exchanger length.

Cubic Equations of State

Simulating the compressibility factor of methane across a pressure sweep using the Peng-Robinson and Soave-Redlich-Kwong equations of state wired into a PathSim simulation.

Flash Drum and Distillation Column

Simulating two fundamental separation processes: an isothermal binary flash drum and a multi-tray distillation column built from individual blocks wired in series.

Vapor Pressure Curves

Comparing vapor pressure correlations for water by sweeping temperature through Antoine, Kirchhoff, and Wagner blocks wired into a PathSim simulation.

Advanced Topics

Multi-Component Flash Separation (BTX)

Simulating an isothermal flash drum for a ternary benzene–toluene–p-xylene (BTX) mixture.

Process Flowsheet: Mixer → Heater → CSTR

A simple process combining multiple unit operations into a flowsheet:

Reactor Point Kinetics

Simulating the transient neutron population in a nuclear reactor using the point kinetics equations (PKE) with six delayed neutron precursor groups.

Valve Flow Characteristics

Exploring the flow behaviour of the block under varying pressure drop conditions.