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|Title:||Dynamic instability in gas-liquid reactors-Oscillatory aerial oxidation of propionaldehyde|
|Authors:||Rastogi, R P|
Misra, G P
|Abstract:||New experimental results on the oscillatory aerial oxidation of propionaldehyde in acetic acid/water medium in the presence of cobalt(ll) acetate and sodium bromide under controlled conditions are reported, Experiments have been performed in semi-batch reactor and continuously flow stirred tank reactor and the results have been compared with the corresponding results for benzaldehyde. The model of Guslander et al as well as an eleven variable model based on amplified mechanism of Roelofs et aL suitable for semi-batch reactor have been used for simulating the oscillatory features of aerial oxidation of aliphatic aldehydes. The rate constants have been assigned keeping in view the wide difference in the rate of formation of C2H5CO, and the reactivity of C2H5CO, C2H5CO2 and C2H5CO3 as compared to corresponding radicals related with benzaldehyde. Both the models predict oscillations in batch reactor in several variables including [Br-]. However, latter model predicts qualitatively correctly the dependence of onset time/time period on [NaBr], [Co2+] and [C2H5CHO] whereas the former model only correctly predicts qualitatively the dependence of time period on [C2H5CHO].|
|Appears in Collections:||IJC-A Vol.35A(02) [February 1996]|
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