Lower concentration limit of carbon filtration combustion

Autor: A. P. Alekseev, E.V. Polianczyk, I. I. Amelin, N. N. Volkova, A. F. Zholudev, A. A. Zhirnov, G. B. Manelis
Rok vydání: 2010
Předmět:
Zdroj: Russian Journal of Physical Chemistry B. 4:265-270
ISSN: 1990-7923
1990-7931
DOI: 10.1134/s1990793110020120
Popis: For mixtures of carbon materials and an inert filler, dependences of the characteristics of the filtration combustion wave on the gaseous oxidizer supply rate at a fuel content in the mixture of less than 7 wt % were obtained. The existence of a lower concentration limit for a steady-state filtration combustion wave was established. It was demonstrated that at a given intensity of heat loss, the concentration limits are determined by the reactivity of the carbon material and the oxidizer supply rate. At the effective coefficient of heat loss α = 8 W/(m2 K), effective conductivity of mixture material λ = 2 W/(m K), and air supply rate G = 0.1 m/s, the lowest fraction of carbon in the mixture at which combustion is still possible was 4.5 wt % for carbon-carbon composite, 2.5 wt % for activated birch coal, and 2.0 wt % for birch coal, the most reactive kind of carbon.
Databáze: OpenAIRE
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