Experimental exploration on NO_x diminution by the combined effect of antioxidant additives with SCR in a diesel engine powered by neem biodiesel

ABSTRACT

The use of biodiesel in diesel engines leads to the reduction of tail pipe emissions; But, several researchers portray that the use of biodiesel produces more NO_x pollution than diesel-fuelled engines, which is an hindrance for the scope of biodiesel usage. In this work, an experimental investigation of the combined effect of antioxidant additive added in the fuel as a fuel modification technique and SCR (selective catalytic reduction) as after a treatment technique on NO_x reduction in a neem biodiesel-powered compression ignition engine has been conducted. Results show that the antioxidant additive combined with the SCR technique reduces the NO_x emission significantly by 82% and there was a slight increase in UBHC and CO emission due to the addition of oxidation-suppressing additives with neem biodiesel and aqueous urea solution injection at the exhaust without a major drop in BTE and fuel consumption.

KEYWORDS:

• neem biodiesel-fuel antioxidant
• SCR after treatment
• NO_x emission reduction

Acknowledgement

The authors extend their sincere thanks to the top office bearers of SVEC and SRMIST for extending us the necessary facilities to execute this investigation.

Disclosure statement

No potential conflict of interest was reported by the authors.