Report on Straight Vegetable Oil as Additive In Diesel Engine to Reduce NOxemission

Abstract

There is notable research is going on to use various Straight Vegetable Oil (SVO) as alternative fuels in diesel engine however the physical property of SVO limits direct use of SVO in diesel engine. The addition of SVO in diesel reduces the combustion temperature in cylinder which leads to higher ubHC and CO emissions, higher carbon deposits and improper combustion. In another side Addition of SVO also reduces NOx emissions significantly. Reduction in cylinder combustion temperature leads to decrease in thermal efficiency of engine and drop in power output. The present project focuses on reduction of NOx emissions from diesel engine by using various SVO in small proportion as additive in diesel to reduce NOx emission. In present assessment SVO such as palm, cotton seed castor and karanja are selected to use as additive in diesel. CI engines are most widely used in transportation, agriculture, building and construction equipment and it is most versatile engine to use alternate fuels. Considering above single-cylinder, 4-stroke, 18 CR,water cooled diesel engine of 3.5 kW at 1500 rpm was selected for the present investigation.The experiments are going to carry out to test the selected fuel to measure the engine performance and emissions. The various blends of SVO and diesel is prepared to carry out the engine performance tests along with the corresponding emission measurements at various load.The performance and NOx emission characteristics of engine will be studied by using diesel, palm, cotton seed castor and Karanja and their blends with diesel and by analyzing the performance characteristics and emission characteristics at the rated load and compared with pure diesel finding out most suitable SVO along with optimum blend ratio.