Effect of n-butanol on cotton seed oil biodiesel: an approach for improving the emission behavior of DI diesel engine
M.A. Asokan, S. Senthur Prabu
Abstract
The broad applications of IC engines hasten the evolution of our civilization and society. In this research, the biodiesel is derived from cottonseed oil through trans-esterification process and various diesel blends with fuel additive (n-butanol) were prepared and tested in single cylinder and four stroke diesel engine. The results for blend B20 showed 11% higher SFC than diesel. Use of BN20 as a fuel helped a decrease by 3.45% with B20. There was a 5.58% rise in the BTE of BN20 compared to B20 at medium operating conditions. Carbon monoxide (CO) emission of B20 was 33% lower than diesel and BN20 blend 16.7% lower than B20. A hydrocarbon (HC) emission from pure biodiesel (B100) resulted in a 10.5% reduction compared to diesel while the increase with respect to BN20 was 13.6%. The NOx emission for B20 and B100 were 7.4% and 16% increases compared to diesel respectively. The NOx value decreases with addition of n- butanol to B20 was 2.4% compared to B20. It was observed that the CSOME with n-butanol a good choice of fuel in terms of performance and improved emissions than diesel and would be a better substitute fuel for a diesel engine.