Measurements and correlations of physico-chemical properties to composition of pseudo-binary mixtures with biodiesel

Nita, Irina; Geacai, Sibel; Iulian, Olga

doi:10.1016/j.renene.2011.05.020

Cited by 47 publications

(31 citation statements)

References 15 publications

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“…In Figure 9 can be seen that as biodiesel concentration increased in the fuel blend, the refractive index decreased. The values are found within the rank reported in the literature [24,25]. The specific gravity increased linearly as the biodiesel concentration augmented in the fuel blend.…”

Section: Refractive Index and Specific Gravity Resultssupporting

confidence: 88%

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Quality Assessment of Biodiesel Blends Proposed by the New Mexican Policy Framework

et al. 2017

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Nowadays, biodiesel is being promoted worldwide as a sustainable and alternative to diesel fuel. However, there is still a lack of a biodiesel market in Mexico. Hence, a new initiative to reform the Mexican biofuels framework by decree includes the production and use of biodiesel. This regulation can ensure and contribute to the development of the biodiesel market in Mexico. The initiative proposes to start from the B5.8 blend by the end of 2017 and reach the B10 by 2020. Therefore, the objective of the present work was the quality assessment of biodiesel blends proposed by the new Mexican policy framework. The techniques applied were Fourier transform infrared (FT-IR) spectroscopy, X-ray fluorescence analysis, scanning electron microscopy analysis, viscosity, higher heating value, thermogravimetric analysis, refractive index, acid number, specific gravity, flash point, and copper strip corrosion based on ASTM standards. The results indicate that the biodiesel and its blends B5.8 and B10 fulfilled relevant quality specifications established in the ASTM D6751 and EN14214 standards for fuels. However, the fuel blends presented a higher heating value (HHV) diminution. The experimental HHV percentages decrease for the mandatory mixtures compared to diesel were 2.29% (B10), and 0.29% (B5.8).

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Section: Refractive Index and Specific Gravity Resultssupporting

confidence: 88%

“…The specific gravity for diesel was 0.838 and for B100 was 0.888. The specific gravity measured for each fuel was within the values reported by the EN 12214 regulations and other authors [25]. Figure 10 describes the viscosity profile for each fuel from 50 °C to 91 °C.…”

Section: Refractive Index and Specific Gravity Resultssupporting

confidence: 60%

Quality Assessment of Biodiesel Blends Proposed by the New Mexican Policy Framework

et al. 2017

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“…Some of the important properties of diesel fuel+biodiesel blends can be evaluated from other blends properties. For example, density and viscosity of biodiesel blends can be predicted based on blend refractive index [15] using a linear or respectively polynomial equation:…”

Section: Introductionmentioning

confidence: 99%

Estimation of the refractive index of diesel fuel+biodiesel blends

Nita

Geacai

Neagu

et al. 2013

Analele Universitatii "Ovidius" Constanta - Seria Chimie

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For now, biodiesel is the commonly accepted biofuel as a substitute for diesel fuel in internal combustion engines. Diesel fuel blends with up to 20% biodiesel can be used in diesel engines without any modification. A lot of studies regarding diesel fuel+biodiesel blends properties are presented in the literature. Some of the important properties of diesel fuel+biodiesel blends can be evaluated from other blends properties. For example, density and viscosity of biodiesel blends can be predicted based on blend refractive index. More than that, refractive index can be used as a reliable physical property to predict transesterification reaction progress. As a result, the refractive index of diesel fuel+biodiesel blends is important in order to characterize these blends or to monitor the evolution of transesterification process of vegetable oils or animal fats. The refractive index of diesel fuel+biodiesel blends can be experimentally determined or evaluated based on refractive indices of diesel fuel and biodiesel. The aim of this study was to estimate the accuracy of refractive index of diesel fuel +biodiesel blends calculation, using models initially proposed to evaluate the refractive index of a binary liquid mixture. It was shown that the refractive index of diesel fuel+biodiesel blends can be accurately predicted from refractive indices of the components of the blend. Wiener, Heller and Edward equations can be recommended to predict with a great accuracy the refractive index of diesel fuel+biodiesel blends.

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“…The molecule vibration modes have been observed by visualization software GaussView, manifesting that esters show a higher vibration tension than hydrocarbons molecule due to the vibration coupling between C-chain and ester group at the end of it. For these reason, biodiesel has a higher terahertz absorption than conventional diesel fuel and α increased with the volume fraction of biodiesel, which was similar to CN and SP [24,25].…”

Section: Resultsmentioning

confidence: 88%

Fuel Property Determination of Biodiesel-Diesel Blends By Terahertz Spectrum

Zhao

Bao

2012

J Infrared Milli Terahz Waves

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The frequency-dependent absorption characteristics of biodiesel and its blends with conventional diesel fuel have been researched in the spectral range of 0.2-1.5 THz by the terahertz time-domain spectroscopy (THz-TDS). The absorption coefficient presented a regular increasing with biodiesel content. A nonlinear multivariate model that correlating cetane number and solidifying point of bio-diesel blends with absorption coefficient has been established, making the quantitative analysis of fuel properties simple. The results made the cetane number and solidifying point prediction possible by THz-TDS technology and indicated a bright future in practical application.

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Measurements and correlations of physico-chemical properties to composition of pseudo-binary mixtures with biodiesel

Cited by 47 publications

References 15 publications

Quality Assessment of Biodiesel Blends Proposed by the New Mexican Policy Framework

Quality Assessment of Biodiesel Blends Proposed by the New Mexican Policy Framework

Estimation of the refractive index of diesel fuel+biodiesel blends

Fuel Property Determination of Biodiesel-Diesel Blends By Terahertz Spectrum

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