AKTS Software Technical Comments

Optimization of Chemical Reactors feed by Simulations based on Kinetic Approach

C. Guinand1, M. Dabros1, B. Roduit3, T. Meyer2, F. Stoessel4

1University of Applied Sciences of Western Switzerland, Bd de Pérolles 80, 1705 Fribourg, Switzerland, http://www.eia-fr.ch
2Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
3AKTS AG, TECHNOArk 1, 3960 Siders, Switzerland, http://www.akts.com
4Swissi Process Safety GmbH, Basel, Switzerland


Abstract

Chemical incidents are typically caused by loss of control, resulting in runaway reactions or process deviations in different stages of the production. In case of fed-batch reactors, the problem generally encountered is the accumulation of heat. The latter is directly related to the temperature of the process, the reaction kinetics and adiabatic temperature rise which is the maximum temperature reachable in case of cooling failure. The main possibility to control the heat accumulation is the use of a well controlled adapted feed. The feed rate can be adjusted by using reaction and reactor dynamic models coupled to Model Predictive Control. Thereby, it is possible to predict the best feed profile respecting the safety constraints.

View Study: Chimia 2014, 68, N° 10, September 16th, (2014)

 


 

Kinetic Identification and Risk Assessment based on Non-Linear Fitting of Calorimetric Data

C. Guinand1, M. Dabros1, B. Roduit2, T. Meyer3, F. Stoessel4

1University of Applied Sciences of Western Switzerland, Bd de Pérolles 80, 1705 Fribourg, Switzerland, http://www.eia-fr.ch
2AKTS AG, TECHNOArk 1, 3960 Siders, Switzerland, http://www.akts.com
3ISIC-GSPC, EPFL, Lausanne, Switzerland
4Swissi Process Safety GmbH, Basel, Switzerland


Abstract

Chemical processes safety requires a thorough knowledge of the kinetic and thermal parameters regarding the chemical reactions involved. The main goal of this work was to develop a method in order to extract the kinetic parameters using different calorimetric technics, experimental design and optimization tools. In the first stage, the esterification of acetic anhydride by methanol was used as a case study for the kinetic identification. In the second stage, a risk assessment was performed using the identified reaction model. Thus, the global kinetic parameters of this reaction, as well as its activation energy and reaction orders were characterized.

View Study (pdf, 520 KB)