Reduction of Vegetable Oil‐Derived Fatty Acid Methyl Esters toward Fatty Alcohols without the Supply of Gaseous H
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Abstract The ohmic-assisted esterification method was compared and contrasted with the conventional esterification method for biodiesel (fatty acid methyl esters) production from vegetable oil refinery waste containing high free fatty acids. The reaction variables were free fatty acid:methanol molar ratio (1:1, 1:5, 1:10, and 1:15), catalyst concentration (1%, 2%, and 3%) and reaction time (5, 30, and 60 min). By increasing the conversion yield of free fatty acids to fatty acid methyl esters, density increased while viscosity and refractive index decreased. Optimum reaction conditions were a molar ratio of 1:10 and a catalyst concentration of 3% after 60 min of esterification reaction, while having a 95.74% conversion yield. There was no significant difference between fatty acid methyl esters produced with ohmic-assisted esterification and conventional esterification methods in terms of fatty acid profile, physicochemical and heating properties. Meanwhile, energy consumption by the conventional esterification method was about 25% higher than that of ohmic-assisted esterification. In fact, ohmic-assisted esterification can be considered as a green, cost-effective alternative method for the production of biodiesel from vegetable oil refinery waste.

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Impact of hydrotreated vegetable oil and biodiesel on properties in blends with mineral diesel fuel

Thermal Science ◽

10.2298/tsci180228315s ◽

2019 ◽

Vol 23 (Suppl. 5) ◽

pp. 1769-1777

Author(s):

Pavel Simacek ◽

Ivan Soucek ◽

Milan Pospisil ◽

Dan Vrtiska ◽

Hugo Kittel

Keyword(s):

Fatty Acid ◽

Low Temperature ◽

Physicochemical Properties ◽

Vegetable Oil ◽

Diesel Fuel ◽

Fatty Acid Methyl Esters ◽

Methyl Esters ◽

The Other ◽

Acid Methyl ◽

Two Samples

Physicochemical properties of three biofuels suitable for combustion in automotive diesel engines were compared. Two samples represented commercial hydrotreated vegetable oil (HVO) with different low temperature properties, one sample represented traditional biodiesel, fatty acid methyl esters (FAME). One HVO sample and FAME were blended into mineral diesel fuel to form two series of mixed fuels. One series represented mixed fuels containing 7, 20, 30, and 50 vol.% of HVO, the other series represented mixed fuels containing the same amount of FAME. All pure fuels as well as all prepared blends were then analyzed and evaluated. The composition and properties of HVO samples are discussed in detail as well as the influence of biocomponents on properties of mixed fuels.

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Synthesis of fatty acid methyl esters from used vegetable oil using activated anthill as catalyst

Nigerian Journal of Technology ◽

10.4314/njt.v39i1.15 ◽

2020 ◽

Vol 39 (1) ◽

pp. 140-147 ◽

Cited By ~ 1

Author(s):

E.O. Babatunde ◽

H.B. Saka ◽

M.A. Olutoye ◽

U.G. Akpan ◽

M. Auta

Keyword(s):

Fatty Acid ◽

Vegetable Oil ◽

Fatty Acid Methyl Esters ◽

Positive Impact ◽

Methyl Esters ◽

Chemical Properties ◽

Catalyst Loading ◽

Acid Methyl ◽

Bet Analysis ◽

Used Vegetable Oil

In this present study transesterification of used vegetable oil (UVO) using synthesized activated anthill as catalyst was investigated. The catalyst was prepared via calcination process, characterized by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD) and Fourier transform infrared (FTIR) techniques. From the BET analysis; calcination temperature has a positive impact on the textural properties. The XRD shows that the catalyst is crystalline in nature. Fatty acid methyl esters (FAME) was produced using thermally activated anthill as catalyst. The optimal FAME yield of 94.85 % was obtained at Methanol/Oil (M/O) 9:1, catalyst loading 1.5 wt%, reaction temperature of 65 ᵒ𝑪 and reaction time of 2 h. The physico-chemical properties of UVO – FAME produced was found to be within the American Society for Testing and Methods (ASTM). Hence, the study reveals that used vegetable oil catalyzed by novel activated anthill could be an effective feedstock to produce sustainable energy. Keywords: Anthills, FAME, Central composite design, Heterogeneous, used vegetable oil.

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