Determination of upper flammability limits of C H O compounds in air at reference temperature and atmospheric pressure

Mendiburu, Andrés Z.; Carvalho, João Andrade de; Coronado, Christian R.

doi:10.1016/j.fuel.2016.10.009

Cited by 12 publications

(17 citation statements)

References 33 publications

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“…The assumption (i) establishes that the process is adiabatic and at constant pressure, this has already been explained in a previous work [29]. Nevertheless, it is important to point out that in order to obtain a reliable experimental measurement of the FL the heat losses to the vessel and to the exterior must be minimized.…”

Section: Quantification Of the Diluent's Effect At The Flmentioning

confidence: 82%

“…This is due to the appearance of species of incomplete combustion that introduce more unknowns to the problem. This assumption has also been applied in previous works [29,30].…”

Section: Quantification Of the Diluent's Effect At The Flmentioning

confidence: 96%

“…As aforementioned, when the reaction is representing the LFL, then, complete combustion can be assumed and the products include CO 2 , H 2 O, O 2 , N 2 and M d [31,32]. On the other hand, if the reaction is representing the UFL, then, incomplete combustion is expected and the products may include CO 2 , CO, H 2 O, H 2 , N 2 and M d , and, even C (carbon graphite) in some cases [30,29].…”

Section: Co 2 (%)mentioning

confidence: 99%

“…A more detailed discussion on the assumption of this global reaction can be found in previous works by Mendiburu et al [29,30]. The assumptions presented in Section 2 are also adopted in the following development.…”

Section: Fipmentioning

confidence: 99%

“…The equilibrium constant and enthalpies are determined by applying the procedures explained in Section 5, using the value of T FIP for the products and 298.15 K for the reactants. v. The parameters m and n are obtained from Eqs (29). and(30).Then, the parameters a, a v , b v and c v are determined by Eqs.…”

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confidence: 99%

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Method for determination of flammability limits of gaseous compounds diluted with N2 and CO2 in air

Mendiburu

Carvalho

Coronado

2018

Fuel

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The present work studies the flammability limits of combustible-diluent-air mixtures at 25°C and 1 atm pressure. The diluent species, considered in this study, were nitrogen and carbon dioxide. A factor called k FL was obtained from mass and energy conservation, this factor relates the flammability limit of a combustible-air mixture to that of a combustible-diluent-air mixture. The factor k FL varies with diluent concentration. Nevertheless, it was shown that an average value of this factor k () FL av can represent, with good accuracy, the variation of the flammability limits with diluent concentration. An empirical method to determine the flammability limits of combustible-diluent-air mixtures was developed. The method approximates k FL av by means of correlations. For the total set of experimental data, it was found that, for dilution with N 2 and CO 2 respectively: (a) at the LFL the Average of the relative errors (AARE) were 4.02% and 7.01%, the squared correlation coefficients (R 2) were 0.9833 and 0.9660; and (b) at the UFL the AAREs were 3.91% and 5.57%, the R 2 were 0.9920 and 0.9792. At the Fuel Inertization Point (FIP) there is an inert concentration above which the mixture is non-flammable. A method was developed to determine the diluent mole fraction in the combustible-inert mixture at the FIP. The AAREs of 0.82% and 1.95% were obtained for dilution with N 2 and CO 2 , respectively.

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Section: Quantification Of the Diluent's Effect At The Flmentioning

confidence: 82%

“…This is due to the appearance of species of incomplete combustion that introduce more unknowns to the problem. This assumption has also been applied in previous works [29,30].…”

Section: Quantification Of the Diluent's Effect At The Flmentioning

confidence: 96%