Temperature dependence of the yield of products of cool-flame oxidation of propane in the region of negative temperature coefficient

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Abstract

The possibility of a cool-flame oxidation of propane-oxygen mixtures of the composition C3H8:O2 = from 1:3 to 1:1, which is accompanied by the phenomenon of a region of negative temperature reaction rate coefficient (NTC), has been experimentally demonstrated. An increase in the C3H8:O2 ratio (enrichment of the mixture with propane) leads to an expansion of the temperature range for the existence of the cool-flame oxidation regime and shifts the NTC region towards higher temperatures. Cool-flame oxidation of propane is accompanied by the formation of a number of popular petrochemical products (olefins, oxygenates, propylene oxide), the relative yield of which can be controlled by changing the composition of the mixture and the oxidation temperature.

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About the authors

M. J. Pogosyan

Nalbandian Institute of Chemical Physics Academy of Sciences of the Republic of Armenia

Email: v_arutyunov@mail.ru
Armenia, Yerevan

N. M. Pogosyan

Nalbandian Institute of Chemical Physics Academy of Sciences of the Republic of Armenia

Email: v_arutyunov@mail.ru
Armenia, Yerevan

S. D. Arsentiev

Nalbandian Institute of Chemical Physics Academy of Sciences of the Republic of Armenia

Email: v_arutyunov@mail.ru
Armenia, Yerevan

L. N. Strekova

Semenov Federal Research Center for Chemical Physics Russian Academy of Sciences

Email: v_arutyunov@mail.ru
Russian Federation, Moscow

V. S. Arutyunov

Semenov Federal Research Center for Chemical Physics Russian Academy of Sciences

Author for correspondence.
Email: v_arutyunov@mail.ru
Russian Federation, Moscow

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2. Fig. 1. Dependence of the change in partial pressure of propane on temperature in mixtures of C3H8: O2 of different compositions: 1 – 1: 1; 2 – 1: 2; 3 – 1: 3.

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3. Fig. 2. Dependence of the partial pressure of ethylene (1 ′, 2 ′, 3 ′) and propylene (1, 2, 3) on temperature in C3H8: O2 mixtures of different compositions: 1, 1 ′ – 1:1; 2, 2 ′ – 1:2; 3, 3 ′ – 1:3.

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4. Fig. 3. Dependence of the partial pressure of formaldehyde (1, 2, 3) and acetaldehyde (1 ′, 2 ′, 3 ′) at the reactor outlet on the temperature in C3H8: O2 mixtures of different compositions: 1, 1 ′ – 1 : 1; 2, 2 ′ – 1 : 2; 3, 3 ′ – 1 : 3.

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5. Fig. 4. Dependence of the partial pressure of methanol at the reactor outlet on the temperature in C3H8: O2 mixtures of different compositions: 1 – 1: 1; 2 – 1: 2; 3 – 1: 3.

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