Abstract
Environmentally friend biodiesel fuel from corn oil was tested in single-cylinder 4-stroke diesel engine operated. Three blends of fuels were prepared from corn oil and diesel fuel viz. 7, 15, and 20 % (designated as B7, B15, and B20, respectively). Tests were conducted on this engine using these blends at a constant speed (1500 rpm) and varying loads (0 % to 100 %). The emissions of carbon monoxide, carbon dioxide, unburned hydrocarbons, nitrogen oxides (NOX) and smoke opacity were measured. In all engine loads, results showed that the emission of CO, HC, and smoke emissions were reduced, while that of NOX and CO2 were increased. Biodiesel blend (B20) showed the highest decrease of the CO and HC and smoke emissions by 22.13 %, 18.5 %, and 25.8 % respectively. While that of NOX and CO2 emissions were increased by 22.3 % and 22%, respectively. It can be recommended as a sound environment friend and renewable for use in diesel engines and can be used without any significant modifications in the engine design.
Highlights
The diesel engine as an internal combustion engine finds wide application in many sectors such as transport, industry, and agriculture, because of its higher efficiency, fuel consumption and greater capacity [1]
The engine is run again three times using biodiesel blends of corn oil B7, B15, and B20 respectively, the emissions were recorded under similar operating conditions to that of pure diesel fuel in terms of engine speed and loading and the data were presented in Figures 3 -7
The results showed that the HC emissions of corn oil biodiesel blend B7, B15 and B20 were less by 6.8%, 12.7%, and 18.5% respectively, compared with pure diesel fuel
Summary
The diesel engine as an internal combustion engine finds wide application in many sectors such as transport, industry, and agriculture, because of its higher efficiency, fuel consumption and greater capacity [1] Their main drawback was the emissions of carbon monoxide, nitrogen oxides, and smoke, which are the main air pollution, which affects human health and the environment. De Serio, et al conducted experiments on direct injection diesel engine with exhaust gas recirculation (EGR) system and examine the emissions They found that on using 7.5 % of unspecified biodiesel blend, it reduce NOX emissions by 30 %, while a slight increase in CO, CO2 and HC emissions [19]. The performance of blends of waste sunflower oil in diesel fuel in compression ignition engine at different speeds and loads was examined and found reduce the emissions by 20-35 % for CO and HC. The emission results for the biodiesel blends were discussed and compared with pure diesel fuel [20,21]
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