TY - JOUR
T1 - Generalized criteria for boundary safe conditions in semi-batch processes
T2 - simulated analysis and experimental results
AU - Alós, M. A.
AU - Nomen, R.
AU - Sempere, J. M.
AU - Strozzi, F.
AU - Zaldívar, J. M.
N1 - Funding Information:
The authors are most grateful to Professors K.R. Westerterp and M. Morbidelli for their valuable comments and suggestions, and to H. Nieman and H. Schönherr for their collaboration in the pilot plant experiments. M.A.A. gratefully acknowledge the part of this work that was supported by the TMR programme of the European Commission.
PY - 1998/9
Y1 - 1998/9
N2 - In this work, the generalised parametric sensitivity criterion has been applied to isoperibolic-constant jacket temperature-semi-batch reactors (SBRs). The results show that the criterion discerns between non-ignition and thermal runaway regions. However, the optimal parametric regions for operating semi-batch processes, called QFS (quick onset, fair conversion and smooth temperature profile) cannot be distinguished from the runaway regions, since both belong to the ignition behaviour. For this reason, a new intrinsic genearlised criterion for characterising QFS regions, based on the earliest ignition time of the process, has been developed. The combination of both criteria allows theoretical results to be compared with those existing in literature. Finally, a catalysed esterification reaction is used to compare the simulated and experimental results carried out as a 2 L bench-scale laboratory reactor and in a 100 L pilot plant reactor. These criteria are believed to be of great utility for the thermal stability analysis of isoperibolic SBRs. Furthermore, they can be easily extended to cope with the control system in case of isothermal SBRs.
AB - In this work, the generalised parametric sensitivity criterion has been applied to isoperibolic-constant jacket temperature-semi-batch reactors (SBRs). The results show that the criterion discerns between non-ignition and thermal runaway regions. However, the optimal parametric regions for operating semi-batch processes, called QFS (quick onset, fair conversion and smooth temperature profile) cannot be distinguished from the runaway regions, since both belong to the ignition behaviour. For this reason, a new intrinsic genearlised criterion for characterising QFS regions, based on the earliest ignition time of the process, has been developed. The combination of both criteria allows theoretical results to be compared with those existing in literature. Finally, a catalysed esterification reaction is used to compare the simulated and experimental results carried out as a 2 L bench-scale laboratory reactor and in a 100 L pilot plant reactor. These criteria are believed to be of great utility for the thermal stability analysis of isoperibolic SBRs. Furthermore, they can be easily extended to cope with the control system in case of isothermal SBRs.
UR - http://www.scopus.com/inward/record.url?scp=0032172310&partnerID=8YFLogxK
U2 - 10.1016/S0255-2701(98)00048-8
DO - 10.1016/S0255-2701(98)00048-8
M3 - Article
AN - SCOPUS:0032172310
SN - 0255-2701
VL - 37
SP - 405
EP - 421
JO - Chemical Engineering and Processing: Process Intensification
JF - Chemical Engineering and Processing: Process Intensification
IS - 5
ER -