Catalytic Distillation:  A Three-Phase Nonequilibrium Model for the Simulation of the Aldol Condensation of Acetone

2001 ◽  
Vol 40 (23) ◽  
pp. 5342-5349 ◽  
Author(s):  
Yuxiang Zheng ◽  
Flora T. T. Ng ◽  
Garry L. Rempel
Keyword(s):  
Aldol Condensation ◽  
Catalytic Distillation ◽  
Nonequilibrium Model ◽  
Three Phase

A three-phase nonequilibrium model for catalytic distillation

2009 ◽  
Vol 63 (2) ◽  
Author(s):  
Marcel Kotora ◽  
Zuzana Švandová ◽  
Jozef Markoš
Keyword(s):  
Effective Diffusivity ◽  
Solid Catalyst ◽  
Algebraic Equations ◽  
Catalytic Distillation ◽  
Nonequilibrium Model ◽  
Three Phase ◽  
Nonlinear Algebraic Equations ◽  
Steady State Simulation ◽  
Heat Transfers ◽  
Fortran Programming Language

AbstractNonequilibrium model for steady state simulation of catalytic distillation is presented. Mathematical model takes into account both mass and heat transfers across the gas liquid interface and through the liquid-solid (catalyst) interface. Equations describing the mentioned phenomena are based on the effective diffusivity approach. The resulting system of nonlinear algebraic equations was implemented in the FORTRAN programming language and solved by the BUNLSI (Ferraris & Tronconi, 1986) solver. The described model was verified using the experimental data obtained from a continuous distillation column equipped with catalytic packing. As an experimental model system, synthesis of propyl propionate from propan-1-ol and propionic acid was chosen. Comparison of experimental and simulation data is presented, and appropriateness of the developed model for other types of catalytic distillation processes is discussed.

Modeling of the Catalytic Distillation Process for the Synthesis of Ethyl Cellosolve Using A Three-Phase Nonequilibrium Model

2002 ◽  
Vol 1 (1) ◽  
Author(s):  
Yuxiang Zheng ◽  
Flora T. T. Ng ◽  
Garry L. Rempel
Keyword(s):  
Theoretical Plate ◽  
Solid Catalyst ◽  
Catalytic Distillation ◽  
Nonequilibrium Model ◽  
Liquid Phases ◽  
Three Phase ◽  
Model Predictions ◽  
Plant Data ◽  
Model Equations ◽  
Good Agreement

The catalytic distillation (CD) process for the synthesis of ethyl cellosolve from ethanol and ethylene oxide on molecular sieve catalyst NKC-01 in a 200 mm CD pilot column was simulated using the three-phase nonequilibrium model which was developed in our laboratory. The main feature of this model is that the actual rates for transport and reaction are used and the stage efficiency or HETP (height equivalent to a theoretical plate) is not required. The effect of multicomponent mass and heat transfer between vapor and liquid phases as well as between liquid and solid (catalyst) phases was taken into account according to the Maxwell-Stefan equations. The Newton-Raphson method was used to solve the model equations. The simulation profiles of the temperature and composition along the column are in good agreement with the pilot CD plant data obtained for the synthesis of ethyl cellosolve. Good agreement between model predictions and experimental data is also obtained for the yield and selectivity of the ethyl cellosolve. This model could be extended to simulate other CD processes and commercial scale CD plants.

A three-phase nonequilibrium dynamic model for catalytic distillation

2005 ◽  
Vol 60 (20) ◽  
pp. 5637-5647 ◽  
Author(s):  
Yongqiang Xu ◽  
Yuxiang Zheng ◽  
Flora T.T. Ng ◽  
Garry L. Rempel
Keyword(s):  
Dynamic Model ◽  
Catalytic Distillation ◽  
Nonequilibrium Dynamic ◽  
Three Phase

A Nonequilibrium Model for Three-Phase Distillation in a Packed Column

2000 ◽  
Vol 33 (10) ◽  
pp. 995-1000
Author(s):  
Jens-Uwe Repke ◽  
Günter Wozny
Keyword(s):  
Packed Column ◽  
Nonequilibrium Model ◽  
Three Phase
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