Question

3. Discuss the reaction of carbon with O2, when the supply of O2, is (a) enough and (b) limited. What is the final product in each case. give chemical reaction
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Answer 1

Answer:

A model of combustion of a high-porosity carbon particle in oxygen is considered, which takes into account heterogeneous and homogeneous chemical reactions inside the particles and radiative heat transfer. The boundaries of the domain where the burning rate depends on the particle temperature are determined. The possibility of two combustion regimes is demonstrated: regime with a high burning rate, where the carbon-oxygen reaction proceeds in a layer adjacent to the particle surface, and regime with a low burning rate, where the reaction proceeds in the entire particle volume. In the regime with a high burning rate, the main product of the reaction between carbon and oxygen is carbon monoxide, whereas both carbon monoxide and carbon dioxide can be formed in the regime with a low burning rate. The kinetic equations of heterogeneous reactions C + O2 = CO2 and 2C + O2 = 2CO are determined, which reveal the retarding effect of carbon monoxide and dioxide on the rates of these reactions.

Explanation:

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