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Optimization and Controllability Analysis of Thermally Coupled Reactive Distillation Arrangements with Minimum Use of Reboilers
Industrial and Engineering Chemistry Research (2012)
  • María Vázquez-Ojeda, Universidad de Guanajuato
  • Juan Gabriel Segovia-Hernández, Universidad de Guanajuato
  • Salvador Hernández, Universidad de Guanajuato
  • Arturo Hernández-Aguirre, Universidad de Guanajuato
  • Rafael Maya-Yescas, Universidad Michoacana de San Nicolas de Hidalgo
Abstract

The optimal design of reactive complex distillation systems is a highly nonlinear and multivariable problem, and the objective function used as optimization criterion is generally nonconvex with several local optimums and subject to several constraints. The esterification of lauric acid and methanol is explored using thermally coupled distillation sequences with side columns and with a minimum number of reboilers. The product of the esterification can be used as biodiesel. This is a major step forward since thermally coupled reactive distillation sequences with side columns and with a minimum number of reboilers offer significant benefits, such as the following: reductions on both capital investment and operating costs due to the absence of the reboilers and higher conversion and selectivity since products are removed as they are produced as well as no occurrence of thermal degradation of the products due to a lower temperature profile in the column. In this work, we have studied the design of reactive distillation with thermal coupling with a minimum number of reboilers, using differential evolution with restrictions coupled to AspenONE Aspen Plus. Also, we have analyzed the control properties of the reactive distillation schemes studied, and the results indicate that the energy requirements and the total annual cost of the complex distillation sequences with a minimum number of reboilers are reduced significantly in comparison with the conventional reactive distillation process and can be also achieved without significant control problems.

Keywords
  • Reactive distillation,
  • controllability,
  • esterification,
  • energy savings
Disciplines
Publication Date
2012
Citation Information
María Vázquez-Ojeda, Juan Gabriel Segovia-Hernández, Salvador Hernández, Arturo Hernández-Aguirre, et al.. "Optimization and Controllability Analysis of Thermally Coupled Reactive Distillation Arrangements with Minimum Use of Reboilers" Industrial and Engineering Chemistry Research Vol. 51 (2012)
Available at: http://works.bepress.com/rafael_maya_yescas/50/