Suiting Dynamic Models of Fixed-Bed Catalytic Reactors for Computer-Based Applications
- 1 Petrobras, Paulínia Refinery (REPLAN). Rodovia SP 332 - Km 132, P.O. Box 1, 13140-000, Paulínia-SP, Brazil
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Abstract
This work investigated the applicability of heterogeneous and pseudo-homogeneous models to predict the dynamic behavior of a fixed-bed catalytic reactor. Some issues concerning the dynamic behavior of the system were discussed, such as the prediction of the inverse response phenomenon. The proposed models (Het- erogeneous I and II and Pseudo-homogeneous) were able to predict with qualitative similarity the main characteristics of the dynamic behavior of a fixed-bed catalytic reactor, including the inverse response. The computational time demanded for the solution of the heterogeneous models was 10 to 50% longer than in the case of the pseudo-homogeneous model, making the use of the former suitable for applications where computational time is not the major restriction (off-line applications). On the other hand, when on-line applications are required, the simplified model (Pseudo-homogeneous model) showed to be a good alternative because this model was able to predict (qualitatively) the dynamics of the reactor using a faster and easier numerical solution.
- H. H. Lou, J. Chandrasekaran and R. A. Smith, “Large- Scale Dynamic Simulation for Security Assessment of an Ethylene Oxide Manufacturing Process,” Computers & Chemical Engineering, Vol. 30, No. 6, 2006, pp. 1102-1118. doi:10.1016/j.compchemeng.2006.02.011
- V. Alopaeus, H. Laavi and J. Aittamaa, “A Dynamic Model for Plug Flow Reactor State Profiles,” Computers & Chemical Engineering, Vol. 32, No. 7, 2008, pp. 1494-1506. doi:10.1016/j.compchemeng.2007.06.025
- A. Jaree, B. Boonsomlanjit and J. Limtrakul, “On the Dynamical Instability of Packed-Bed Reactors in the Presence of Catalyst Deactivation,” Computers & Che- mical Engineering, Vol. 32, No. 12, 2008, pp. 2897-2902. doi:10.1016/j.compchemeng.2008.02.004
- A. Jaree, R. R. Hudgins, H. Budman, R. L. Silveston, V. Yakhnin and M. Menzinger, “Amplification of inlet temperature disturbances in a packed-bed reactor for CO oxidation over Pt/Al2O3,” Chemical Engineering Science, Vol. 58, No. 3-6, 2003, pp. 833-839. doi:10.1016/S0009-2509(02)00614-0
- C. McGreavy and R. Maciel Filho, “Dynamic Behaviour of Fixed Bed Catalytic Reactors,” In: IFAC Dynamics and Control of Chemical Reactors, Maastricht, the Netherlands, 1989.
- A. Jutan, J. P. Tremblay, J. F. McGregor and J. D. Wright, “Multivariable Computer Control of a Butane Hydrogenolysis Reactor: Part I. State Space Reactor Modelling,” AIChE Journal, Vol. 23, No. 5, 1977, pp. 732-742. doi:10.1002/aic.690230516
- O. M. Martinez, S. J. Pereira Duarte and N. O. Lemcoff, “Modeling of Fixed Bed Catalytic Reactors,” Computers & Chemical Engineering, Vol. 9, No. 5, 1985, pp. 535- 545. doi:10.1016/0098-1354(85)80028-4
- R. Maciel Filho, “Modelling and Control of Multitubular Reactors,” Ph.D. dissertation, University of Leeds, Leeds, 1989.
- L. Pellegrini, G. Biardi and E. Ranzi, “Dynamic Model of Packed-Bed Tubular Reactors,” Computers Chemical Engineering, Vol. 13, No. 4-5, 1989, pp. 511-518. doi:10.1016/0098-1354(89)85033-1
- G. H. Froment and K. B. Bischoff, “Chemical Reactor Analysis and Design,” 2nd Edition, John Wiley & Sons, New York, 1990.
- S. S. E. H. Elnashaie and S. S. Elshishini, “Modelling, Simulation and Optimization of Industrial Fixed Bed Catalytic Reactors,” Topics in Chemical Engineering, Vol. 7, 1st Edition, Gordon and Breach Science Publishers, Yverdon, Switzerland, 1993.
- E. C. Vasco de Toledo, “Modelling, Simulation and Control of the Fixed Bed Catalytic Reactors,” Ph.D. dissertation, University of Campinas, S?o Paulo, 1999.