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Related Experiment Videos

Multivariable optimization of a multiproduct continuous chemicals facility.

Hoshang Subawalla1, Anthony J Zehnder, Michael Turcotte

  • 1Air Products and Chemicals, Inc., 7201 Hamilton Boulevard, Allentown, Pennsylvania 18195-1501, USA. subawah@apci.com

ISA Transactions
|March 6, 2004
PubMed
Summary

Multivariable optimization (MVO) significantly boosted methylamines production capacity by 14% for MMA and 7% for TMA. This chemical process optimization also reduced energy use by 20% and improved product quality by 31%.

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Area of Science:

  • Chemical Engineering
  • Process Optimization
  • Industrial Chemistry

Background:

  • Multivariable optimization (MVO) is a key technique for steady-state chemical process simulation.
  • It enhances plant performance by increasing capacity and reducing energy consumption.
  • MVO relies on user-defined objectives, constraints, and variable limits.

Purpose of the Study:

  • To demonstrate the application of MVO combined with automation and statistical process monitoring.
  • To improve capacity and reduce energy consumption in a methylamines production facility.
  • To quantify the impact of these improvements over a two-year period.

Main Methods:

  • Implementation of Multivariable Optimization (MVO) for process control.
  • Integration of advanced automation and statistical process monitoring.

Related Experiment Videos

  • Application in a methylamines facility producing MMA, DMA, and TMA.

    • Main Results:

    • Achieved a 14% increase in MMA capacity and a 7% increase in TMA capacity.
    • Reduced energy consumption per pound of product by approximately 20% over a six-month period.
    • Improved process capability by 60% and product quality by 31%.

    Conclusions:

    • MVO, automation, and statistical monitoring effectively enhance chemical plant performance.
    • Improvements are attributed to smoother setpoint transitions, better disturbance rejection, and reduced operator intervention.
    • The integrated approach leads to significant gains in capacity, energy efficiency, and product quality.