Paper Titles

Maximum Density Effects on Natural Convection over an Isothermal Vertical Plate Embedded in an Anisotropic Porous Medium
p.1

Peristaltic Flow of a Jeffery Fluid with Heat Transfer in an Inclined Porous Tube under the Influence of Slip and Variable Viscosity
p.16

Analytical Study of Transient Heat Transfer in a Triangular Moving Porous Fin with Temperature Dependant Thermal Properties
p.31

Effect of Variable Thermal Conductivity Calibration Functions on Fin Temperature Distribution
p.47

Reactant Consumption and Thermal Decomposition Analysis in a Two-Step Combustible Slab
p.59

Magnetohydrodynamics Boundary Layer Slip Casson Fluid Flow over a Dissipated Stretched Cylinder
p.73

Chemical Reaction Effect on Nonlinear Radiative MHD Nanofluid Flow over Cone and Wedge
p.83

Heat and Mass Transfer of MHD Dissipative Casson Nanofluid Flow over a Stretching or Shrinking Sheet with Multiple Slip Boundary Conditions
p.103

A Semi-Analytical Approach to Time Dependent Squeezing Flow of Cu and Ag Water-Based Nanofluids
p.121

HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 393Reactant Consumption and Thermal Decomposition...

Reactant Consumption and Thermal Decomposition Analysis in a Two-Step Combustible Slab

Article Preview

Abstract:

The significance of this paper is to analyse thermal decomposition and reactant consumption in a stockpile of reactive materials, such as that of coal, hay or wood, for example. The study is modelled in a rectangular slab and a two-step combustion process like the one taking place in fuel combustion of an automobile is assumed. The coupling of Runge-Kutta-Fehlberg (RKF) method and Shooting technique is applied to solve the differential equations governing the problem. The combustion process that is so complicated is investigated by consideration of effects of some embedded kinetic parameters, such as the activation energy, on the temperature and the reactant (O2) consumption. It was discovered that parameters such as the activation energy, tend to lower the temperature of the system and correspondingly reduce the O2 consumption rate, whereas parameters like the rate of reaction, increase the temperature during the combustion process, to reduce the O2 concentration of the system. The results also indicate that parameters like the rate of reaction, which increase the temperature profiles, fast-track the exothermic chemical reaction to deplete the reactant faster. However, those that reduce the temperature of the system preserve the reactant concentration.

You might also be interested in these eBooks

Transfer Phenomena in Fluid and Heat Flows IX

Info:

Periodical:

Defect and Diffusion Forum (Volume 393)

Pages:

59-72

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.393.59

Citation:

Cite this paper

Online since:

June 2019

Authors:

Ramoshweu Solomon Lebelo*, Radley Kebarapetse Mahlobo, Samuel Olumide Adesanya

Keywords:

Exothermic Chemical Reaction, Radiative Heat Transfer, Reactive Slab, Two-Step Combustion Process

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2019 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

* - Corresponding Author

[1] R. S. Lebelo, Thermal Stability Investigation in a Reactive Sphere of Combustible Material, Adv. Math. Phys., (2016) 1 – 6.

[2] R. S. Lebelo, BR Mabuza, Numerical investigation of thermal stability in media of different physical geometries, J. Eng. Appl. Sci. 12(24) (2017) 7555-7561.

[3] R. S. Lebelo and O. D. Makinde, Numerical investigation of CO2 emission and thermal stability of a convective and radiative stockpile of reactive material in a cylindrical pipe, Adv. Mech. Eng., 7 (12) (2015) 1–11.

DOI: 10.1063/1.4898446

[4] R. S. Lebelo, KC Moloi, Heat loss analysis in a radiating slab of variable thermal conductivity, Int. J. Eng. Tech., 7 (2.23) (2018) 228-231.

DOI: 10.14419/ijet.v7i2.23.11924

[5] RS Lebelo, OD Makinde, T Chinyoka, Thermal decomposition analysis in a sphere of combustible materials. Adv. Mech. Eng., 9(2) (2017) 1–14.

DOI: 10.1177/1687814017692515

[6] O. D. Makinde, Hermite-Pade´ approach to thermal stability of reacting masses in a slab with asymmetric convective cooling,, J Frankl Inst., 349 (2012) 957–965.

DOI: 10.1016/j.jfranklin.2011.12.001

[7] O.D. Makinde, M.S. Tshehla, 2013, Analysis of thermal stability in a convecting and radiating two-step reactive slab, Adv. Mech. Eng. (2013) 1-9.

DOI: 10.1155/2013/294961

[8] RS Lebelo, KC Moloi, KO Okosun, M Mukamuri, SO Adesanya, MS Muthuvalu, 2018, Two-step low-temperature oxidation for thermal stability analysis of a combustible sphere, AEJ (2018) 57 2829–2835.

DOI: 10.1016/j.aej.2018.01.006

[9] O.S. Makinde, K.S. Adegbie, O.A. Fasoranbaku, Mathematical modelling of two-step exothermic reactions with and without reactants consumption, FUTA J. Res. Sci. 1(2013)44-53.

[10] J.C. Quick, D. C. Glick, Carbon dioxide from coal combustion: variation with rank of US coal, Fuel, 79 (7) (2000) 803–812.

DOI: 10.1016/s0016-2361(99)00197-0

[11] O.D. Makinde, T. Chinyoka, and R. S. Lebelo, 2011, Numerical Investigation into CO2 Emission, O2 Depletion, and Thermal Decomposition in a Reacting Slab, Math. Probl. Eng. (2011) 1-19.

DOI: 10.1155/2011/208426

[12] R. S. Lebelo, O.D. Makinde, Modelling the impact of radiative heat loss on CO2 emission, O2 depletion and thermal stability in a reactive slab, IJST, Trans. Mech. Eng. 39(M2) (2015)351-365.

[13] A. R. A. Aitken, et al., Repeated large-scale retreat and advances of Totten Glacier indicated by inland bed erosion, Nature, 533 (2016) 385-389.

DOI: 10.1038/nature17447

[14] A. Arisoy, B.B. Beamish, E. Cetezen, Modelling spontaneous combustion of Coal, Turk. J. Eng. Environ. Sci. 30 (2006) 193–201.

[15] R Hendershot, TD. Lebrecht, NC Easterbrook, Use Oxygen to Improve Combustion and Oxidation, Chem. Eng. Prog. 106(7) (2010) 57-61.

[16] BS Haynes, Combustion research for chemical processing, Proc. Comb. Inst., 37 (1)2019 1-32.