Abstract
In this article, we investigate the combined effects of emission of CO2 and O2 depletion on thermal stability in a long cylindrical pipe of combustible reactive material. The cylindrical pipe loses heat by convection and radiation at the surface, and the nonlinear differential equations governing the heat and mass transfer problem are tackled numerically using Runge–Kutta–Fehlberg method coupled with shooting technique. The effects of various thermo-physical parameters on the temperature, CO2 and O2 fields, and thermal stability are presented graphically and discussed quantitatively.
Highlights
The study of CO2 emission and thermal stability due to exothermic chemical reaction in a stockpile of combustible reactive materials is of importance in the study of the environment and understanding of heat transfer in engineering processes
Our results below reveal the effect of storage geometry on the exothermic reaction and CO2 emission in reactive materials which invariably affect the environment through the production of ozone layer leading to climate change and global warming
We study how various parameters play a role in the CO2 emission due to exothermic chemical reaction taking place within a reactive cylinder of combustible material
Summary
The study of CO2 emission and thermal stability due to exothermic chemical reaction in a stockpile of combustible reactive materials is of importance in the study of the environment and understanding of heat transfer in engineering processes. Theoretical study of thermal stability in a stockpile of combustible materials due to exothermic chemical reactions has a wide range of industrial applications These applications include processes such as heavy oil recovery, incineration of waste material, storage of cellulose material, combustion of solids, pyrolysis of biomass and coal, and in design of internal combustion engines and automobile exhaust systems.[2,3,4] The heat generated as a result of exothermic chemical reaction in a stockpile of combustible material may exceed the heat loss to the surrounding environment, leading to the phenomenon called thermal explosion.[5,6,7,8] Analysis of thermal explosion criticality was explored by Frank-Kamenetskii[9] who developed the steadystate theory of exothermic reactive materials.
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