Biodiesel preparation in a batch emulsification reactor

Hájek, Martin; Skopal, František; Kwiecień, J.

doi:10.1002/ejlt.200900012

Cited by 6 publications

(1 citation statement)

References 14 publications

(14 reference statements)

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“…Methanol, as well as ethanol, are immiscible with oil and form a heterogeneous two-phase system. The reaction proceeds at the interface, and intense stirring is necessary [53]. The heterogeneous system can be "removed" by the addition of another liquid (co-solvent), such as tetrahydrofuran, acetone, hexane [54], which forms one phase.…”

Section: Alcoholsmentioning

confidence: 99%

The Catalysed Transformation of Vegetable Oils or Animal Fats to Biofuels and Bio-Lubricants: A Review

et al. 2021

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This review paper summarizes the current state-of-the-art of the chemical transformation of oils/fats (i.e., triacylglycerols) to the use of biofuels or bio-lubricants in the means of transport, which is a novelty. The chemical transformation is necessary to obtain products that are more usable with properties corresponding to fuels synthesized from crude oil. Two types of fuels are described—biodiesel (the mixture of methyl esters produced by transesterification) and green diesel (paraffins produced by hydrogenation of oils). Moreover, three bio-lubricant synthesis methods are described. The transformation, which is usually catalysed, depends on: (i) the type and composition of the raw material, including alcohols for biodiesel production and hydrogen for green diesel; (ii) the type of the catalyst in the case of catalysed reactions; (iii) the reaction conditions; and (iv) types of final products. The most important catalysts, especially heterogeneous and including reaction conditions, for each product are described. The properties of biodiesel and green diesel and a comparison with diesel from crude oil are also discussed.

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Section: Alcoholsmentioning

confidence: 99%

The Catalysed Transformation of Vegetable Oils or Animal Fats to Biofuels and Bio-Lubricants: A Review

et al. 2021

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Study of effects of some reaction conditions on ethanolysis of rapeseed oil with dispergation

Černoch

Hájek

Skopal

2010

Bioresource Technology

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The alkaline-catalyzed (KOH) ethanolysis of rapeseed oil with the help of a mechanical disperser was researched in this study. The effects of chosen reaction conditions (independent variables: the reaction temperature and time, the amount of catalyst, the molar ratio ethanol to oil and the rotation frequency of the disperser) on the ethanolysis process and ways for the improvement of the transesterification and separation process were studied. The transesterification of oil, the separation of the ester phase from the glycerol phase and qualitative properties of the ester phase were monitored by many dependent variables (e.g. the yield of the ester phase, the weight concentration of glycerides, the content of potassium ions etc). The measured data was analyzed by multi-linear regression with the help of many statistical tests (significance of parameters, exclusion of outliers etc.). The created mathematical models describing the relations between the independent and dependent variables were verified by several independent experiments.

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Relationships among flash point, carbon residue, viscosity and some impurities in biodiesel after ethanolysis of rapeseed oil

Černoch

Hájek

Skopal

2010

Bioresource Technology

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Many samples of rapeseed oil ethyl ester were prepared by alkaline-catalyzed transesterification at various conditions (reaction time, temperature, amount of catalyst, the molar ratio of ethanol to oil, the rotations of a disperser and the purification by water). The concentrations of the key impurities for biodiesel quality (the concentrations of monoglycerides, diglycerides, triglycerides, free glycerol, ethanol, free fatty acids, water) and some qualitative parameters (flash point, carbon residue, kinematics viscosity at 40 °C) were determined and then the relationships among them were found out. The relationships were characterized by the linear or non-linear statistical models.The found models enable the better understanding of the significance of the qualitative parameters and estimate them from the concentrations of impurities. The temperature 2 dependence was also measured in the case of the viscosity of ethyl ester and used rapeseed oil.

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Biodiesel preparation in a batch emulsification reactor

Cited by 6 publications

References 14 publications

The Catalysed Transformation of Vegetable Oils or Animal Fats to Biofuels and Bio-Lubricants: A Review

The Catalysed Transformation of Vegetable Oils or Animal Fats to Biofuels and Bio-Lubricants: A Review

Study of effects of some reaction conditions on ethanolysis of rapeseed oil with dispergation

Relationships among flash point, carbon residue, viscosity and some impurities in biodiesel after ethanolysis of rapeseed oil

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