A Comparative Study and Regression Analysis on Physico-Thermal Properties using Pongamia Pinnata - Waste Cooking Oil Methyl Ester Mixture

ABSTRACT

Development of alternative fuels over the past three decades is trending research for the replacement or supplement of the mineral-based fuels. In the present study, a combined biodiesel mixture was prepared volumetrically from methyl esters of pongamia pinnata and waste cooking oil (50:50). Physico-thermal properties (Density, viscosity and calorific value) for blends varying from 5 to 30% were determined, for both combined biodiesel blends and their respective sources. Further, a comparative study on the physico-thermal properties of combined biodiesel blends with their respective sources was made. Similar trends were observed between the combined biodiesel blends and their respective sources. i.e., density and kinematic viscosity increased with increase in blend percentage. Alternatively, a decreasing trend was observed in the calorific value. Statistical analysis using Minitab was carried out. Backward elimination method was used to develop a regression model to determine the coefficient of determination between the properties and the volumetric contribution of blends. The models were significant at a confidence interval of 95%. The R-Square value for predicting density, kinematic viscosity and the calorific value was 99.37%, 99.05% and 99.84% respectively.

KEYWORDS:

• Biodiesel
• physico-thermal properties
• regression analysis
• combined biodiesel. anova analysis

Nomenclature

PPO: Pongamia pinnata oil.

WCO: Waste cooking oil.

MPO: Methyl esters of pongamia pinnata.

MWCO: Methyl esters of Waste cooking oil.

CMPWCO: combined Methyl esters of Pongamia pinnata and Waste cooking oil.

R-Square: Coefficient of determination.

Vol: Volume.

IC: Internal combustion.

N: Normal

vs: Versus

ρ, γ and CV: Density, Kinematic Viscosity@40°Celsius and Calorific Value, respectively.

Cst: Centi stokes

Additional information

Notes on contributors

Balaji Rao Khale

Balaji Rao K is presently pursuing his Doctoral programme in Department of Mining Engineering, National Institute of Technology Karnataka, Surathkal. he has put up n experience of more than 10 years in the field of education.

Bijay Mihir Kunar

Dr. Bijay Mihir Kunar pursued his doctoral degree from IIT, Kharagpur and  is presently working as Assistant Professor, Department of Mining Engineering, National Institute of Technology Karnataka, Surathkal. he has put up an experience of more than 15 years in the field of education.

Chivukula Suryanarayana Murthy

Dr. Chivukula Suryanarayana Murthy pursued his doctoral degree from IIT, Kharagpur and  is presently working as Professor-HAG, Department of Mining Engineering, National Institute of Technology Karnataka, Surathkal. he has put up an experience of more than 30 years in the field of education.