Formation, structure, and rheological properties of ricinelaidic acid-vegetable oil organogels

In this investigation, the effects of the temperature on the flow characteristics of waste vegetable oil biodiesel modified bentonite drilling mud were quantified. The biodiesel contents in the drilling muds are varied from 0 to 9% of the volume of the water in order to reduce the yield point and upper shear stress limit produced by the mud during drilling activities under simulated thermal condition ranging from 28°C to 180°C. The results revealed that the bentonite drilling mud loaded with 6 vol.% waste vegetable oil biodiesel demonstrates fairly favorable rheological properties compared to others when exposed to similar heat treatment. Moreover, the rheological behavior of biodiesel-free bentonite mud and samples loaded with biodiesel were quantified using the Vipulanandan model and compared with others existing models used in the industry such as: Bingham plastic model and Herschel-Bulkley model. It was observed that the Vipulanandan model predicts satisfactorily the shear thinning relationship between the shear stress and shear strain rate of the modified bentonite drilling muds. Furthermore, by using the Vipulanandan model, the maximum shear stress values for 0%, 3%, 6% and 9% biodiesel content at 28°C are found to be 63.67 Pa, 84.54 Pa, 84.64 Pa and 85.02 Pa, respectively. When exposed to heat treatment at 180°C, the maximum shear stress values recorded for 0%, 3%, 6% and 9% are 53.18 Pa, 67.39 Pa, 64.52 Pa and 72.70 Pa, respectively, which represent a reduction of 14% to 16% in the upper shear stress limit.

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RHEOLOGICAL PROPERTIES OF BRINE/VEGETABLE OIL/POLYETHOXYLATED NON-IONIC SURFACTANTS BASED MICROEMULSION

HOLOS - ISSN 1807-1600 ◽

10.15628/holos.2018.6227 ◽

2018 ◽

Vol 2 ◽

pp. 16-25

Author(s):

Elayne Andrade Araújo ◽

Fabíola Dias da Silva Curbelo ◽

Alfredo Ismael Curbelo Garnica ◽

Roxana Pereira Fernandes Sousa ◽

Edson De Andrade Araújo ◽

...

Keyword(s):

Rheological Properties ◽

Vegetable Oil ◽

Ionic Surfactants

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Diethyl Ether as an Oxygenated Additive for Fossil Diesel/Vegetable Oil Blends: Evaluation of Performance and Emission Quality of Triple Blends on a Diesel Engine

Energies ◽

10.3390/en13071542 ◽

2020 ◽

Vol 13 (7) ◽

pp. 1542 ◽

Cited By ~ 5

Author(s):

Laura Aguado-Deblas ◽

Jesús Hidalgo-Carrillo ◽

Felipa M. Bautista ◽

Diego Luna ◽

Carlos Luna ◽

...

Keyword(s):

Diesel Engine ◽

Rheological Properties ◽

Vegetable Oil ◽

Diethyl Ether ◽

Vegetable Oils ◽

Flow Properties ◽

High Oxygen Content ◽

Performance And Emission ◽

Cold Flow ◽

Cold Flow Properties

The aim of this work is to analyze the effect of using diethyl ether (DEE) as an oxygenated additive of straight vegetable oils (SVOs) in triple blends with fossil diesel, to be used in current compression ignition (C.I.) engines, in order to implement the current process of replacing fossil fuels with others of a renewable nature. The use of DEE is considered taking into account the favorable properties for blending with SVO and fossil diesel, such as its very low kinematic viscosity, high oxygen content, low autoignition temperature, broad flammability limits (it works as a cold start aid for engines), and very low values of cloud and pour point. Therefore, DEE can be used as a solvent of vegetable oils to reduce the viscosity of the blends and to improve cold flow properties. Besides, DEE is considered renewable, since it can be easily obtained from bioethanol, which is produced from biomass through a dehydration process. The vegetable oils evaluated in the mixtures with DEE were castor oil, which is inedible, and sunflower oil, used as a standard reference for waste cooking oil. In order to meet European petrodiesel standard EN 590, a study of the more relevant rheological properties of biofuels obtained from the DEE/vegetable oil double blends has been performed. The incorporation of fossil diesel to these double blends gives rise to diesel/DEE/vegetable oil triple blends, which exhibited suitable rheological properties to be able to operate in conventional diesel engines. These blends have been tested in a conventional diesel engine, operating as an electricity generator. The efficiency, consumption and smoke emissions in the engine have been measured. The results reveal that a substitution of fossil diesel up to 40% by volume can be achieved, independently of the SVO employed. Moreover, a significant reduction in the emission levels of pollutants and better cold flow properties has been also obtained with all blends tested.

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