Каталітичне займання, погасання та горіння ацетону в повітрі на платинових нитках різного діаметру

Oleksander Chernenko; Valery Kalinchak; Oleksander Kopiyka; Anna Fedorenko; Mykhaylo Roziznanyi

doi:10.15330/pcss.26.1.111-117

Authors

Oleksander Chernenko Odesa I.I. Mechnikov National University, Odesa, Ukraine
Valery Kalinchak Odesa I.I. Mechnikov National University, Odesa, Ukraine
Oleksander Kopiyka Odesa I.I. Mechnikov National University, Odesa, Ukraine
Anna Fedorenko Odesa I.I. Mechnikov National University, Odesa, Ukraine
Mykhaylo Roziznanyi Odesa I.I. Mechnikov National University, Odesa, Ukraine

DOI:

https://doi.org/10.15330/pcss.26.1.111-117

Keywords:

catalytic oxidation, platinum wire, diameter, acetone vapor

Abstract

The relationship I/d based on the analysis of the analytical dependence of the stationary temperature of the catalyst thread on the heating current strength is proposed in the work. It allows estimating the range of current strength for a certain diameter of the catalyst thread, within which observation of ignition and extinction of the heterogeneous catalytic reaction is possible. Experimental studies for the catalytic oxidation of acetone in air on a platinum catalyst thread with diameters of 20, 70, and 95 microns showed that considering convection requires adjusting this relationship as I/d•Nu^1/2. As a result, the representation of the temperature of the catalyst thread from this complex exhibits coordination of low- and high-temperature oxidation regimes, as well as critical conditions of catalytic ignition and extinction. This assessment is possible when using an electrical heating circuit of the thread in the current stabilization mode.

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