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SYNTHESIS OF PROPYLENE GLYCOL BY REACTIVE DISTILLATION

SYNTHESIS OF PROPYLENE GLYCOL BY REACTIVE DISTILLATION. S. Galán 1 , R. De María 1 & F. Domingo 2 1 ETSII-Universidad Politécnica de Madrid 2 Repsol-YPF, I&D Downstream, Química, Energía y Gas. PROCESS SIMULATION AS A TOOL FOR THE CONCEPTUAL DESIGN OF NEW PROCESSES.

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SYNTHESIS OF PROPYLENE GLYCOL BY REACTIVE DISTILLATION

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  1. SYNTHESIS OF PROPYLENE GLYCOL BY REACTIVE DISTILLATION S. Galán1, R. De María1 & F. Domingo2 1ETSII-Universidad Politécnica de Madrid 2Repsol-YPF, I&D Downstream, Química, Energía y Gas PROCESS SIMULATION AS A TOOL FOR THE CONCEPTUAL DESIGN OF NEW PROCESSES AspenWorld 2000

  2. Propylene glycol production Reactive distillation Use of simulation through the design process: Conceptual design Kinetic model development Pilot plant Results: Steady state multiplicities Influence of variables OUTLINE AspenWorld 2000

  3. Reactions AspenWorld 2000

  4. 2 plants: Puertollano (Spain): 20,000 t/a Tarragona (Spain): 50,000 t/a (@ 2000) 2/3 Tubular reactors + 7 distillation columns Important issues: High Water/PO ratio to maximize MPG selectivity Running cost related to water excess Changes in product demand Process flexibility Glycol production at Repsol-YPF AspenWorld 2000

  5. Current process AspenWorld 2000

  6. Reactive distillation AspenWorld 2000

  7. Conventional process vs. Reactive distillation AspenWorld 2000

  8. Preliminary design Screening of process alternatives Profitability analysis Definition of a base flowsheet Simulation for Conceptual Design AspenWorld 2000

  9. Experimental program Data regression Analysis of results Simulation for Kinetic Modeling AspenWorld 2000

  10. Simulation in the Pilot Plant AspenWorld 2000

  11. Design of the Pilot Plant AspenWorld 2000

  12. Temperature profiles AspenWorld 2000

  13. Steady State Multiplicities AspenWorld 2000

  14. Composition profiles AspenWorld 2000

  15. Reaction rate profiles AspenWorld 2000

  16. Feed and pressure influence AspenWorld 2000

  17. Pressure influence AspenWorld 2000

  18. Boil-up ratio influence AspenWorld 2000

  19. ASPEN PLUS MATLAB for data analysis PITCON & AUTO for detection of multiplicities by homotopy continuation methods ABACUSS for dynamic simulation Software Tools AspenWorld 2000

  20. A process for MPG by hydration of PO in a (reactive) distillation column is considered profitable. The interaction between reaction and separation introduces a more complex behaviour leading to new challenges in design, operation and control. Repsol-YPF has been applying succesfully simulation (Aspen Plus) as a key tool through the development process. At this time, in the pilot plant stage. Conclusions AspenWorld 2000

  21. Santos Galán (sgalan@diquima.upm.es) Francisco Domingo (fdomingor@repsol.es) http://www.diquima.upm.es/proyectos/glicoles/glicoles.html AspenWorld 2000

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