Role of Heat Transfer on Oxidation Processes in Jet Stirred Flow Reactors

The poster will show recent advancement on the interpretation of Jet-Stirred Flow Reactor (JSFR) experimental results focused on low temperature conditions with several elementary fuels (Sabia et al., 2015; Lubrano Lavadera et al., 2016). The significant discrepancy between experiments and model predictions raised the issue of a lack of knowledge, that could be both in the chemical kinetics and in the heat loss evaluation. Indeed, it was found, through parametric continuation analyses (Acampora and Marra, 2015), that a very small error on the heat loss estimation, gives rise to a large error in the equilibrium temperature of the system, making impossible an accurate estimation of the kinetic parameters. To quantify this effect, parametric continuation analyses of lean and very diluted hydrogen/oxygen/ diluent mixtures in a non-adiabatic PSR have been compared with the experimental study of the same mixtures in a JSFR. It is found that some classical global heat transfer correlations for this class of system (Lignola and Reverchon, 1988) are not adequate to achieve correct predictions. A new correlation is being developed: while this is a current ongoing activity, that require a larger number of experimental points for its proper assessment, the main dependencies have been identified, giving an indication for the proper experimental protocol to follow in these conditions.