الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Biodiesel has generated increased interest in a lot of countries recently because of the growth of energy demand and limited of fossil fuel resources combined with growing concern over health related and environmental concerns. Biodiesel can be utilized as a direct replacement for conventional petroleum diesel or mixed with it to create blended fuels. Because it can be produced from domestic feedstocks such as soybeans, canola oil, and waste cooking oil, biodiesel can help reduce dependence on foreign petroleum.
The effect of using waste cooking oil biodiesel blends with diesel fuel of percentages (B10, B20, B30, B40, B50) are conducted in Johndeere direct injection diesel engine, 6-cylinders 6.6 liters, vertical in-line, turbocharged and eddy current dynamometer to evaluate the performance and emission associated with the use of biodiesel blends compared to diesel fuel. Evaluation of fuels is accomplished in performance sector of Misr petroleum research center (MPRC).
The results of engine performance with variable loads showed that the brake specific fuel consumption ( ) and exhaust gas temperature ( ) of biodiesel blends are higher than diesel fuel with ratios from (5.4 to 14.6%) and (0.4 to 5.2%) respectively, while the brake thermal efficiency ( ), volumetric efficiency ( ) and air to fuel ratio ( ) decreased with ratios from (4.8 to 8.3%), (1.9 to 2.5%) and (7.7 to 15.6%) respectively. The second part of results are of engine emissions which showed obvious reduction in carbon monoxide ( ), unburned hydrocarbons ( ) emissions and smoke opacity with ratios from (16.1 to 47.7%), (4.2 to 27.5%) and (6 to 19.2%) respectively, while there are a slight increase of carbon dioxide ( ) and increase in nitrogen oxides ( ) emissions with ratios from (0.6 to 2.7%) and (1.8 to 6.9%) respectively.