Communications

Influence of noble metals on thermoacoustic oscillations and boundaries of the region of negative temperature coefficient during combustion of n-pentane – air mixtures

N. M. Rubtsov^a, G. I. Tsvetkov^a, V. I. Chernysh^a, K. Ya. Troshin<sup>b

a</sup> A.G. Merzhanov Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Chernogolovka, Moscow Region, Russian Federation
^b N.N. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Moscow, Russian Federation

Abstract: Using the combustion of n-pentane – air mixtures as an example, it was shown that thermoacoustic regimes of ignition disappear in the presence of a platinum surface, which generates catalytic centers propagating into the volume. Thus, the platinum catalyst eliminates a certain stage of kinetic mechanism, and the negative temperature coefficient phenomenon vanishes. In the presence of a palladium catalytic surface that does not generate catalytic centers propagating into the volume, the phenomenon of a negative temperature coefficient occurs.

Keywords: ignition, premixed, n-pentane–air, thermoacoustic, platinum, palladium, negative temperature coefficient.

Language: English

DOI: 10.1016/j.mencom.2022.09.043

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