Dynamic Optimization of UV Flash Processes

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UV ash processes, also referred to as isoenergetic-isochoric ash processes, occur for dynamic simulation and optimization of vapor-liquid equilibrium processes. Dynamic optimization and nonlinear model predictive control of distillation columns, certain two-phase ow problems, as well as oil reservoirs with signi_cant compositional and thermal e_ects may be conducted as dynamic optimization of UV ash processes. The dynamic optimization problem involving a UV ash problem is formulated as a bilevel optimization problem. This problem is solved using a gradient based single-shooting method. The gradients are computed using the adjoint method and di_erent o_-the-shelf optimization software (fmincon, IPOPT, KNITRO, NPSOL) are used for the numerical optimization. Computational results are reported for a ash process involving benzene, toluene and diphenyl. The computational experiments demonstrate that the optimization solver, the compiler, and high-performance linear algebra software are all important for e_cient dynamic optimization of UV ash processes.
Original languageEnglish
Title of host publicationProceedings of FOCAPO / CPC 2017
Number of pages6
Publication date2017
Publication statusPublished - 2017
EventFOCAPO / CPC 2017 - Tucson, Arizona, United States
Duration: 8 Jan 201712 Jan 2017


ConferenceFOCAPO / CPC 2017
Country/TerritoryUnited States
CityTucson, Arizona
Internet address


  • Optimization
  • Optimal Control
  • Dierential Algebraic Equations
  • Vapor-Liquid Equilibrium


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