Browse Publications Technical Papers 2005-01-3674
2005-10-24

Fuel and Injection Characteristics for a Biodiesel Type Fuel from Waste Cooking Oil 2005-01-3674

The paper presents some experimental results concerning the use of a biodiesel type fuel (BTF).
The fuel was produced using waste cooking oil, collected from a local branch of the McDonalds' restaurants. Cooking oils, used for frying food, have a limited life in food production due to their contamination with debris from food and due to fatty acids formation. As a result, waste cooking oil can be seen as a “near to waste” by-product of food production industry; thus, the use of waste cooking oil instead of virgin oil in order to produce biodiesel is an effective way to reduce the raw material cost and helps to solve the problem of waste oil disposal. The base catalyzed method was used for producing the methyl ester.
Referring to the physical properties of the fuel, we noticed that the transesterification process has significantly decreased the viscosity of the methylester, which is very close to the one of Diesel fuel (5.7 mm2/s, compared to 4.9 mm2/s for Diesel fuel, in comparison with 34 mm2/s - the initial viscosity of the oil).
For the tests we used the injection equipment of a D.I. Diesel engine (in line type A, RO-PES4A90D410RS2240 injection pump, engine stroke/bore = 130/108 mm, four in-line cylinders, 65 HP/1800 rev/min. The use of methylester led to changes of the injection characteristics (increased injection pressure, lower average injection rate, and earlier start of combustion).

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