Rapid multistep kinetic model generation from transient flow data

Hone, Christopher A. and Holmes, Nicholas and Akien, Geoffrey R. and Bourne, Richard A. and Muller, Frans L. (2017) Rapid multistep kinetic model generation from transient flow data. Reaction Chemistry and Engineering, 2 (2). pp. 103-108. ISSN 2058-9883

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Today, the generation of kinetic models is still seen as a resource intensive and specialised activity. We report an efficient method of generating reaction profiles from transient flows using a state-of-the-art continuous-flow platform. Experimental data for multistep aromatic nucleophilic substitution reactions are collected from an automated linear gradient flow ramp with online HPLC at the reactor outlet. Using this approach, we generated 16 profiles, at 3 different inlet concentrations and 4 temperatures, in less than 3 hours run time. The kinetic parameters, 4 rate constants and 4 activation energies were fitted with less than 4% uncertainty. We derived an expression for the error in the observed rate constants due to dispersion and showed that such error is 5% or lower. The large range of operational conditions prevented the need to isolate individual reaction steps. Our approach enables early identification of the sensitivity of product quality to parameter changes and early use of unit operation models to identify optimal process-equipment combinations in silico, greatly reducing scale up risks.

Item Type:
Journal Article
Journal or Publication Title:
Reaction Chemistry and Engineering
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Deposited On:
09 Jun 2017 15:08
Last Modified:
20 Sep 2023 01:03