Experimental investigations of biodiesel operated ci engine using antioxidant additive in low heat rejection mode

Abstract

Biodiesel is one of the promising alternate fuel for CI engine newlinedepending on their heat content and combustion. Biodiesel is an oxygenated, newlinenon-toxic, sulfur free, biodegradable and renewable fuel. It can be used in CI newlineengines in any proportion blended with diesel without any major modification newlinein the engine. The use of biodiesel can reduce a CI engine s overall emission newlineup to 75 percent. It can also reduces engine wear and tear, improves durability newlineand help a CI engine vehicle last longer due to its high lubricity. Biodiesel is newlinealkyl esters of fatty acids and can be obtained by employing the transesterification of vegetable oils, animal fats, waste cooking oil, waste restaurant greases and third generation fuel such as algae etc.Even though, biodiesel is having lot of advantages, decrease of performance and increase of oxides of nitrogen are the major draw backs. Hence in the present investigation, an attempt has been made to study the newlineenvironmentally available biodiesel in CI engines. Numerous sources of newlinebiodiesel are presently available in India. Among these mango seed oil, newlinemahua oil and pungamia oil are promising biodiesels which can be utilized newlineeffectively in CI engines.A single cylinder 4-stroke water-cooled DI CI engine developing 5.2 newlinekW is selected for the experimental work. The engine cylinder head, piston newlinehead and valves of the engine are coated with lanthanum oxide using plasma newlinespray coating technique and the thickness is maintained as 0.5 mm. The newlinecoated and uncoated engine are tested with mahua oil, mango seed oil and newlinepungamia oil with different proportions. Further these biodiesels are added newlinewith L-ascorbic acid to suppress emissions, particularly NOx emission. newline newline