Abstract
| Original language | Undefined |
|---|---|
| Pages (from-to) | 367-375 |
| Number of pages | 9 |
| Journal | Chemical engineering and technology |
| Volume | 14 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 1991 |
Keywords
- METIS-105799
- IR-70946
Cite this
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Thermally safe operation of a semibatch reactor for liquid-liquid reactions - Fast reactions. / Steensma, M.; Steensma, Metske; Westerterp, K.R.
In: Chemical engineering and technology, Vol. 14, No. 6, 1991, p. 367-375.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Thermally safe operation of a semibatch reactor for liquid-liquid reactions - Fast reactions
AU - Steensma, M.
AU - Steensma, Metske
AU - Westerterp, K.R.
PY - 1991
Y1 - 1991
N2 - Accumulation of the reactant supplied to a cooled semibatch reactor (SBR) will occur if the mass transfer rate across the interface is insufficient to keep pace with the supply rate. Then, due to a low starting temperature or supercooling, the reaction temperature does not rise fast enough to the desired value. This accumulation may eventually lead to a temperature runaway. We investigated the possibility of such an event for reactions of the type "chemically enhanced mass transfer" or "fast" and found that only low distribution coefficients, i.e. 10-4 or lower, can lead to accumulation. At higher distribution coefficients, the mass transfer rate across the interface of a well-mixed dispersion is generally sufficient to prevent accumulation. A thermal runaway in the fast regime exerts a moderate effect, because the effective activation energy is halved. Calculations for the instantaneous reaction regime, regarded as a special case of fast reactions, show that there is no runaway possible.
AB - Accumulation of the reactant supplied to a cooled semibatch reactor (SBR) will occur if the mass transfer rate across the interface is insufficient to keep pace with the supply rate. Then, due to a low starting temperature or supercooling, the reaction temperature does not rise fast enough to the desired value. This accumulation may eventually lead to a temperature runaway. We investigated the possibility of such an event for reactions of the type "chemically enhanced mass transfer" or "fast" and found that only low distribution coefficients, i.e. 10-4 or lower, can lead to accumulation. At higher distribution coefficients, the mass transfer rate across the interface of a well-mixed dispersion is generally sufficient to prevent accumulation. A thermal runaway in the fast regime exerts a moderate effect, because the effective activation energy is halved. Calculations for the instantaneous reaction regime, regarded as a special case of fast reactions, show that there is no runaway possible.
KW - METIS-105799
KW - IR-70946
U2 - 10.1002/ceat.270140602
DO - 10.1002/ceat.270140602
M3 - Article
VL - 14
SP - 367
EP - 375
JO - Chemical engineering and technology
JF - Chemical engineering and technology
SN - 0930-7516
IS - 6
ER -