This article analyzed carbon dioxide (CO2) emission from the combustion of reactive materials modeled in a cylindrical domain. Reactive materials in this case involve carbon-containing substances that react spontaneously with the oxygen of the surrounding environment under the influence of an exothermic chemical reaction. In this analysis, the reactant (oxygen) consumption was neglected. The nonlinear differential equation governing the problem was solved numerically using the Finite Difference Method embedded within the Maple software. It was found that there are kinetic parameters that enhance the emission of CO2, like the rate of reaction, and others, like the heat loss parameter, retard the CO2 emission during the exothermic chemical reaction. © 2022, World Scientific and Engineering Academy and Society. All rights reserved.