PSE's gPROMS® advanced process modelling software and services for digital design and intelligent digital operation are transforming the way the chemical process industries design and operate plants.

gPROMS ProcessBuilder's combination of high-fidelity reactor and separation models coupled with advanced global system analysis (GSA) and industry-leading optimisation techniques make it possible to dramatically accelerate next-generation process design and identify millions of dollars from 'already-optimised' processes.

Our laboratory-to-operating-plant approach reduces time-to-market and risk for new process development, and helps minimise capital and operating cost.

The downstream value chain

PSE's capabilities cover the entire downstream process application space with a single steady-state and dynamic process modelling environment, gPROMS ProcessBuilder®.


ProcessBuilder’s Olefins model library allows easy high-fidelity offline modelling of ethylene plants with different furnace types for whole-plant optimisation and what-if studies. The gPROMS Olefins suite of Operational Excellence Solutions (OES) implements high-fidelity models online for coke monitoring, real-time yield reporting, run length prediction and furnace section optimisation.

Intermediates & Derivatives

PSE has world-leading technology for optimising reactor design and operation in the context of whole-plant optimisation. In addition, high-fidelity models can be implemented online as part of the gPROMS Reactor OES to monitor KPIs (including catalyst deactivation), provide soft-sensed values and optimise operation.


We provide industry-leading capabilities for optimising LPDE production, based on high-fidelity population balance models – coupled with CFD models where necessary – to provide accurate molecular weight distribution (MWD).

R&D laboratory facilities

PSE’s high-fidelity modelling approach integrates multi-scale first-principles models of physics and chemistry with experimental data for real-world validation. We can supply cost-effective laboratory experimentation capabilities, including design and execution of experiments.

Many other specific applications

PSE tools provide advanced process modelling capabilities for many key Chemicals & Petrochemicals process operations. Some examples are:

Advanced catalytic reactor design

Advanced reaction modelling technology makes it possible to design detailed reactors and include these in whole-plant flowsheet optimisations.
This means that you can optimise process designs taking all relevant interactions into account.

State-of-the-art separation models

ProcessBuilder provides state-of-the-art capabilities for steady-state and dynamic equilibrium distillation, rate based separation, pressure-swing adsorption, membrane separation and hybrid separation.

Solution crystallization

PSE provides unique capabilities for design, scale-up and operational optimisation of batch and continuous crystallization processes, including recipe optimisation.

Solids process modelling

PSE's unique capabilities for batch, continuous and semi-batch solids process operations use high-fidelity rigorous models to optimise design and operations.

Cyclic separation processes

The power of the gPROMS environment allows easy solution of complex complex separation processes such as pressure-swing adsorption.

Water treatment

Our extensive libraries of high-fidelity biological and physico-chemical wastewater treatment process models allow optimisation of design and operations as well as troubleshooting of treatment plants.

gPROMS Operational Excellence Solutions

We provide a wide range of Operational Excellence Solutions for chemicals & petrochemicals processes.

These combine plant data with high-fidelity models, leveraging your investment in models to create value every day.

More Information

We improved process economics by tens of millions of €/year