Model optimization for the dynamic simulation of reactive absorption processes

Citation
R. Schneider et A. Gorak, Model optimization for the dynamic simulation of reactive absorption processes, CHEM ENG TE, 24(10), 2001, pp. 979-989
Citations number
28
Language
INGLESE
art.tipo
Review
Categorie Soggetti
Chemical Engineering
Journal title
CHEMICAL ENGINEERING & TECHNOLOGY
ISSN journal
0930-7516 → ACNP
Volume
24
Issue
10
Year of publication
2001
Pages
979 - 989
Database
ISI
SICI code
0930-7516(200110)24:10<979:MOFTDS>2.0.ZU;2-H
Abstract
The optimal design of reactive separations is impossible without reliable p rocess models. Especially for the dynamic simulation and the model-based co ntrol of complex reactive absorption processes the model development leads to a contradiction between the required model accuracy to reflect the proce ss complexity and the feasibility of process simulations regarding the comp utation time. In this respect, we have developed a new rigorous dynamic two -phase model based on the two-film theory as a first step, which takes into account the influence of chemical reactions and additional driving forces in electrolyte systems on mass transfer considering thermodynamic nonideali ties as well as the impact of column internals on the process hydrodynamics . For a model optimization, we have performed an analysis of different mode l approaches for complicated industrial absorption processes and determined an appropriate model complexity. Based on results of sensitivity studies, we have accomplished different model modifications leading to a stabilizati on of the numerical solution without affecting the good agreement between s imulation results and the experimental data. This time-optimized model can be considered superior as compared to previous approaches and facilitates f or the first time a rigorous dynamic simulation of entire reactive absorpti on columns and the application within an on-line process control system.