Experimental analysis of a mini truck CRDI diesel engine fueled with n-Amyl alcohol/diesel blends with selective catalytic reduction (SCR) as a DeNOx technique under the influence of EGR

Abstract

ABSTRACTThe current work aims to investigate the compatibility of n-Amyl alcohol in a mini-truck common rail direct injection (CRDI) compression ignition (CI) engine with exhaust gas recirculation (EGR) and selective catalytic reduction (SCR) as a DeNOx technique. The n-Amyl alcohol is a renewable biofuel it effectively mitigates the demand for fossil fuels and reduces greenhouse gas emission. Palladium and Rhodium coated SCR catalyst was used to reduce the nitrogen oxides (NOx) emission. For SCR of NOx ammonia was used as a reductant. From the experimental results, it was noted that with an increase in the percentage of alcohol in the blends, a slight drop in brake thermal efficiency (BTE) and higher brake specific energy consumption (BSEC) was observed. Both NOx and hydrocarbon (HC) emissions could be reduced with the use of n-Amyl alcohol and a combination of SCR and EGR techniques. The maximum reduction of NOx can be successfully achieved with the use of 40N60D (40% n-Amyl alcohol & 60% Diesel v/v) blend with SCR and 20% EGR at the slight cost of BTE. The engine can be successfully worked up to 40% of n-Amyl alcohol/diesel blends without causing any visible damage to the engine, with less NOx emissions. It is concluded that n-Amyl alcohol will be a sustainable next-generation biofuel for commercial vehicles.