Abstract
Biodiesel is biodegradable, clean-burning, non-toxic, renewable, high-quality, and cheap diesel fuel made primarily from waste vegetable oil which can be used without any alterations in engine design. The paper is concerned with the extraction and quality evaluation of the biodiesel fuels synthesized from waste soya bean cooking oil. Waste soya bean cooking oil had high amount of free fatty acid. Thus, single step transesterification process with the aid of homogeneous catalyst as 1% potassium hydroxide were implemented in this experiment. Methanol was chosen as alcohol solvent. In the transesterification process, the triglycerides in waste cooking oil was reacted with a methanol to form esters and glycerol as by product.The biodiesel were extracted for different oil to methanol ratio as 1:2, 1:3 and 1:4. The highest biodiesel yield of 76% was obtained at 1:3 volumetric ratio for 60 ºC reaction temperature and 1250 rpm stirring speed. Results show that the optimal methyl ester yield of 90% occurred at methanol: oil volume ratio of 3:1. The product met the ASTM fuel standards for relative density, acid value, relative density, calorific value, flash point and kinematic viscosity.
Highlights
Biofuels are the energy carriers that store the energy derived from biomass, commonly produced from plants, animals and micro-organisms and organic wastes
The highest biodiesel yield was obtained (71.2%) under the conditions of 1:1 volumetric oil-to-methanol weight ratio, 0.5% NaOH catalyst at 50°C reaction temperature and 320 rpm stirring speed.The results showed that biodiesel produced from different oil to methanol ratios, alcohol types and shaking time exhibited considerable
The relative density of different samples of waste soya bean at room temperature were found in the range of 880 to 905 kg/m3 which was in the range 800 to 900 kg/m3 at 150c temperature recommended by ASTM D 6751
Summary
Biofuels are the energy carriers that store the energy derived from biomass, commonly produced from plants, animals and micro-organisms and organic wastes. After a few years later in 1970s, the world petroleum reserves depleted and the earth start fighting with the environmental problems This make biodiesel was taken into consideration as one of the efficient alternatives fuel. The production of biodiesel from waste cooking oil is one of the better ways to utilize it efficiently and economically. It was concluded that the use of waste cooking oils is an effective way to reduce the cost of biodiesel production. The advantages of using waste cooking oils to produce biodiesel are the low cost and prevention of environment pollution. These oils need to be treating before dispose to the environment to prevent pollution. There was a considerable difference of biodiesel yield produced by using methanol, ethanol and 1butanol
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
