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Emission Testing and Engine Performance of Diesel Engine Using Stable Blends of Soya Methyl Esters and Diesel (2014-2015)

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  • Emission Testing and Engine Performance of Diesel Engine Using Stable Blends of Soya Methyl Esters and Diesel (2014-2015)

Thesis Archive

Emission Testing and Engine Performance of Diesel Engine Using Stable Blends of Soya Methyl Esters and Diesel (2014-2015)

Jian Carlo B. Bautista
Ynah Franchezca D. Bonifacio
Paul Joshua S. Segubre

Abstract:

-The rapid escalation of fuel demand initiated the subsequent depletion of its resources. This has raised interest in the research and production of unconventional fuels in order to provide renewable sources of energy, such as biodiesel, as alternatives. This study proposes the utilization of stable Soya Methyl Ester (SME)-diesel blends for engine performance and emission analysis in a diesel engine. The biodiesel used in the study is produced through the transesterification of soya oil with methanol using sodium hydroxide as catalyst. The biodiesel were mixed with commercially available diesel using the following volume ratios: B15, B25, B50 and B75. The determination of the stability was determined by storing the blends at room temperature for 7 days. All of the blends were found to be stable. The initial analyses involve essential properties which include cloud point, flash point, pour point, kinematic viscosity and density. The data resulting from the analyses was then compared with the Philippine National Standards wherein only the B15 was found to conform to the set values for biodiesel. Secondary analyses include cetane index, distillation temperature range and gross heating value. It was found that Flash point, Pour Point, Cetane Index, Kinematic Viscosity increases as the amount of SME increases; whereas a decrease in the value of Cloud Point and Heating value was observed when there is increasing concentration of SME. The determination of the performance of the fuel using the B15, B25 and B50 blends was done in a four-stroke common rail direct injection (CRDI) engine. The blends showed a decreasing values of brake power and break thermal efficiency when concentration of the biodiesel is increased. While brake specific fuel consumption when increases when there is more amount of SME in the blend. Emission testing in a diesel engine was done using the B15 blend and results show an increase on the emissions of CO2 and NOx compared to a diesel. A decrease in CO, Unburned Hydrocarbons and Smoke Opacity is also evident. The research was able to confirm the probable use of the B15 as a good fuel alternative. It was also determined the cost effective blend is B15 among the blends used in the study in terms of speed, fuel consumption and market cost of biodiesel.

Adviser:

Dr. Susan A. Roces
Dr. Nathaniel P. Dugos

[email protected]
[email protected]

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