Equation of state modeling for the vapor pressure of biodiesel fuels

Díaz, O. Castellanos; Schoeggl, F. F.; Yarranton, Harvey W.; Satyro, Marco A.

doi:10.1016/j.fluid.2014.12.050

Cited by 11 publications

(11 citation statements)

References 11 publications

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“…It was shown to increase almost linearly with temperature. Similar results but for canola and coconut biodiesel fuels and in a narrower temperature range (283 -328 K) were reported in [50].…”

Section: Appendix 3 Transport and Thermodynamic Properties Of Biodiessupporting

confidence: 87%

“…Similar results but for canola and coconut biodiesel fuels and in a graphical form in the temperature range from about 323 K to 473 K, using experimental data from [60], were reported in [50]. In general, the saturated vapour pressures for biodiesel fuel were shown to be much lower than those for Diesel fuel [58].…”

Section: Appendix 3 Transport and Thermodynamic Properties Of Biodiessupporting

confidence: 71%

“…The saturated vapour pressure (in Pa) of pure liquid methyl esters shown in Tables A1 and A2 can be estimated based on the following general formula, valid in the temperature range 260 K ≤ T ≤ 610 K [50]: Vapour density is calculated from the ideal gas law as:…”

Section: Saturated Vapour Pressurementioning

confidence: 99%

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Modelling of biodiesel fuel droplet heating and evaporation

Sazhin

Qubeissi

Kolodnytska

et al. 2014

Fuel

112

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Biodiesel fuel droplet heating and evaporation is investigated using the previously developed models, taking into account temperature gradient, recirculation, and species diffusion within droplets. The analysis is focused on four types of biodiesel fuels: Palm Methyl Ester, Hemp Methyl Esters, Rapeseed oil Methyl Ester, and Soybean oil Methyl Ester. These fuels contain up to 15 various methyl esters and possibly small amounts of unspecified additives, which are treated as methyl esters with some average characteristics. Calculations are performed using two approaches: 1) taking into account the contribution of all components of biodiesel fuels (up to 16); and 2) assuming that these fuels can be treated as a one component fuel with averaged transport and thermodynamic coefficients. It is pointed out that for all types of biodiesel fuel the predictions of the multi-component and single component models are rather close (the droplet evaporation times predicted by these models differ by less than about 5.5%). This difference is much smaller than observed in the case of Diesel and gasoline fuel droplets, and is related to the 1 Corresponding author, e-mail: S.Sazhin@brighton.ac.uk Preprint submitted to FuelMarch 28, 2013 fact that in the case of Diesel and gasoline fuel droplets the contribution of components in a wide range of molar masses and enthalpies of evaporation needs to be taken into account, while in the case of biodiesel fuels the main contribution comes from the components in a narrow range of molar masses and enthalpies of evaporation. As in the case of Diesel and gasoline fuel droplets, the multi-component model predicts higher droplet surface temperature and longer evaporation times than the single component model.

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Section: Appendix 3 Transport and Thermodynamic Properties Of Biodiessupporting

confidence: 87%

Section: Appendix 3 Transport and Thermodynamic Properties Of Biodiessupporting

confidence: 71%

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Modelling of biodiesel fuel droplet heating and evaporation

Sazhin

Qubeissi

Kolodnytska

et al. 2014

Fuel

112

View full text Add to dashboard Cite

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“…Furthermore, a carefully determined vapor pressure−temperature curve is essential to the assessment of other relevant properties of biodiesel, such as the cold weather properties and the heat of vaporization. 5,6 This property influences the rates of vaporization and injection characteristics of a fuel and, therefore, is crucial to the modeling of combustion processes. 6 The composition of biodiesel is mainly affected by the feedstock used in its production.…”

Section: ■ Introductionmentioning

confidence: 99%

“…5,6 This property influences the rates of vaporization and injection characteristics of a fuel and, therefore, is crucial to the modeling of combustion processes. 6 The composition of biodiesel is mainly affected by the feedstock used in its production. Different vegetable oils may generate biodiesels with very scattering compositions, and thus, with diverging physical properties.…”

Section: ■ Introductionmentioning

confidence: 99%

Estimation of Vapor Pressures and Enthalpies of Vaporization of Biodiesel-Related Fatty Acid Alkyl Esters. Part 1. Evaluation of Group Contribution and Corresponding States Methods

Evangelista

Carmo

Sant’Ana

2017

Ind. Eng. Chem. Res.

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Several models based on the Group Contribution concept and on the Corresponding States Principle were reviewed for the estimation of vapor pressures and enthalpies of vaporization of fatty acid methyl and ethyl esters commonly occurring in biodiesel. The accuracy of each model was tested by comparing its output values to experimental data obtained from the literature. For vapor pressures, the number of occurrences where the methods failed completely have also been analyzed. Efforts were made to identify the best method for the estimation of each property and it was observed that the models' reliability depend on the type of ester and on the operational conditions (pressure and temperature) considered.

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Determination of vapour pressures of FAME industrial mixtures by ebullioscopic and thermogravimetric experimental methods

Tonsi,

Zanella,

Grainca

et al. 2024

Can J Chem Eng

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Vapour pressure (VP) is a parameter that characterizes, by principle, only pure compounds. Nevertheless, it can refer also to mixtures in order to characterize their volatility or to be inserted in technical documents. The measurement of VP for mixtures is strongly dependent on the possible variation of the composition, during experiments, due to the different volatility of the constituent compounds. It is possible to calculate the VP of the mixture starting from its composition, but different thermodynamic scenarios must be considered. Moreover, for industrial samples, possible effects due to the presence of impurities must be considered. In this work, two different experimental methods have been employed to determine VP of some acetates esters and two industrial mixtures of fatty acid methyl esters (FAME). The first method is a direct ebullioscopic method, while the second is an indirect thermogravimetric analysis (TGA). An error function was calculated to compare the experimental results of VPs obtained with the two methodologies with the theoretical ones. Ebullioscopic measures resulted suitable only for acetates esters, as FAME mixtures are characterized by VPs too low to be quantified with this technique. On the contrary, TGA methodology is more accurate for FAME than acetates. It allows the collection of a great number of VP values with a very fast analysis. This method is less accurate than others, but it can be useful for a fast screening of the FAME mixtures, also contaminated with light impurities.

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Equation of state modeling for the vapor pressure of biodiesel fuels

Cited by 11 publications

References 11 publications

Modelling of biodiesel fuel droplet heating and evaporation

Modelling of biodiesel fuel droplet heating and evaporation

Estimation of Vapor Pressures and Enthalpies of Vaporization of Biodiesel-Related Fatty Acid Alkyl Esters. Part 1. Evaluation of Group Contribution and Corresponding States Methods

Determination of vapour pressures of FAME industrial mixtures by ebullioscopic and thermogravimetric experimental methods

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