A Stagewise Algorithm for Multicomponent Multistage Batch Distillation Calculation.

  • Mori Hideki
    Department of Applied Chemistry, Nagoya Institute of Technology
  • Goto Hiroki
    Department of Applied Chemistry, Nagoya Institute of Technology
  • Yang Zhi Cai
    Department of Applied Chemistry, Nagoya Institute of Technology
  • Aragaki Tsutomu
    Department of Applied Chemistry, Nagoya Institute of Technology
  • Koh Seung-Tae
    Department of Applied Chemistry, Nagoya Institute of Technology
  • Akiba Iwao
    Idemitsu Petrochemical Co. Ltd.

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抄録

A stagewise algorithm is proposed for the solution of multicomponent multistage batch distillation problems. In order to make the algorithm more precise and flexible, a generalized implicit Euler equation is implemented for numerical integration of the process variables on each stage at succeeding time steps. An overall normalized θ method is also employed to accelerate convergence for each time step. The relative performance of the proposed method compared with the Runge-Kutta method is shown using a numerical example; the CPU time can be decreased by up to 1/300. Comparison of the simulation results with the experiment suggests the adequacy of the proposed method.

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