Aspen RateSep™

Rate-based column modeling for maximum reliability

Aspen RateSep extends the functionality of the Aspen Plus® RadFrac distillation model with second-generation rate-based technology, ensuring more accurate simulation predictions over a wider range of operating conditions. Aspen RateSep uses state-of-the-art mass and heat transfer correlations to predict column performance, eliminating the need for efficiency factors or HETPs.

Aspen RateSep is a core element of AspenTech aspenONE™ Process Engineering applications.

Features

Tightly integrated into Aspen Plus, allowing single-click switch from equilibrium-based to rate-based distillation calculations; homotopy options ensure robust initialization and convergence.
Online deployment of models as part of an open-loop operator advisory system or in closed-loop, real-time optimization/advanced process control applications when used with Aspen Online Deployment™ and Aspen Simulation Workbook™.
Best-in-class physical properties methods and data. Aspen RateSep uses the extensive databases of pure component and phase equilibrium data built into Aspen Plus.
Reactive distillation, including electrolytic, equilibrium, and kinetic reactions
Built-in mass and heat transfer and column hydraulics correlations for a wide range of trays and packing types.
Extensibility. Includes a full set of interfaces to link in user-defined correlations for transfer coefficients, interfacial area, pressure drop, and kinetics.
Design mode for calculating column diameter based on approach to flooding
Leverages Aspen Plus’s unique equation-oriented architecture, ensuring excellent computational performance

Options

Aspen RateSep is an optional extension of Aspen Plus, tightly integrated with the industry-standard RadFrac distillation model, enabling single-click transition from equilibrium-based to rate-based calculations
Aspen Simulation Workbook enables easy development of Excel®-based user interfaces to Aspen Plus models, enabling deployment to casual users

Benefits

Aspen RateSep is a proven, second-generation, rate-based distillation modeling solution used by nearly 100 commercial clients. Customers have recognized and reported:

More than 10% savings in capital expenditure by avoiding costly over-design of key distillation equipment Significantly improved model accuracy compared to equilibrium-based and first-generation, rate-based distillation models Reduced risks of inadequately sizing key columns, resulting in better investment decisions and improved ROI

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