Published at : 25 Oct 2018
Volume : IJtech
Vol 9, No 5 (2018)
DOI : https://doi.org/10.14716/ijtech.v9i5.1950
Minh Tuan Pham | Hanoi University of Science and Technology |
Anh Tuan Hoang | Ho Chi Minh city University of Transport |
Anh Tuan Le | Hanoi University of Science and Technology |
Abdel Rahman M.Said Al-Tawaha | Al-Hussein bin Talal University |
Van Huong Dong | Ho Chi Minh city University of Transport |
Van Vang Le | Ho Chi Minh city University of Transport |
Biodiesel has been considered as the potential fuel
type with many advantages such as environmental pollution reduction, no sulfur
production, and biodegradation. However, disadvantages
of biodiesel such as high viscosity and high density affected diesel engines
and fuel systems negatively. Thus, it is necessary to reduce the viscosity and
density of biodiesel fuel in unmodified diesel engines. Until now, a large number of empirical correlations have
been used to predict the viscosity and density of biodiesel–fossil diesel fuel
blend This study was conducted to predict the kinematic viscosity and
density of blends of biodiesel and fossil diesel fuel. Three
types of biodiesel were examined: Coconut oil-based biodiesel (COB), Jatropha oil-based
biodiesel (JOB), and Waste oil-based biodiesel (WOB). Twenty-four samples
of the three types of biodiesel–diesel fuel blends were created by blending 5%
(B5), 10% (B10), 20% (B20), 40% (B40), 50% (B50), 60% (B60), 75% (B75), and
100% (B100) of biodiesel with conventional diesel fuel to produce the
corresponding blends for experimental purposes. Experimental
correlations and mathematical equations for predicting the relationship between
the kinematic viscosity and the density of the biodiesel–fossil diesel fuel
blends, the dependence of the kinematic viscosity and the density of the
biodiesel–fossil diesel fuel blends on biodiesel fractions, and the effects of
temperature on the kinematic viscosity and density of pure biodiesel were
developed. The results of the experimental correlation data were near the
predicted mathematical equation with a confidence level of 95%.
Biodiesel; Biodiesel fraction; Density; Kinematic viscosity; Temperature
In this work, a dual model based on temperatures and volume fractions to estimate the density and kinematic viscosity of pure biodiesel and biodiesel–diesel fuel blends was developed. Three types of biodiesel, COB, JOB, and WOB, were used in both experiments. The main results are summarized as follows:
The density and kinematic viscosity of pure biodiesel were inversely proportional to temperature, whereas the density and kinematic viscosity of biodiesel–diesel fuel blend increased as the volume fractions of the biodiesel increased. Empirical equations with high confidence levels were established.
The results showed R2 = 0.9979 in predicting the dependence of the density of pure biodiesel on temperature and R2 = 0.9844 in predicting the dependence of the density of biodiesel–diesel fuel blends on volume fractions. Similarly, the results showed R2 = 0.9942 and R2 = 0.9957 in predicting kinematic viscosity. In the experimental results and the model, the relationship between density and kinematic viscosity was R2 = 0.9961.
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