Analysis of a diesel engine fuelled with jojoba blend and coir pith producer gas

Abstract

The emission characteristics of Jojoba biodiesel and preheated Jojoba oil blends along with producer gas from coir pith, in a dual fuel diesel engine under two different experimental conditions, were measured. The present experiment the emission characteristics of a diesel engine that was operated in dual fuel mode. The producer gas is the main fuel and jojoba biodiesel blends and jojoba preheated oil are the injected fuel. Firstly, diesel, biodiesel blends, and preheated oils with coir pith generated producer gas were examined in both individual and dual fuel mode at a constant gas flow rate of 21.69 kg/hour at various loading conditions. Secondly, the same test fuels were taken at constant load and different gas flow rates at 10 KW in dual mode. An engine test analysis was carried out at varying load conditions (0 kW, 2 kW, 4 kW, 6 kW, 8 kW, and 10 kW) by keeping the producer gas flow rate constant i.e. at 21.69 kg/h. All emissions were seen to be on the higher side for preheated oil as compared to biodiesel producer gas dual fuel mode at all load conditions. The nitrogen oxides and smoke opacity were reduced, whereas carbon dioxide, carbon monoxide and hydrocarbon were increased for all test fuels in dual fuel operation as compared to a single style at different loading conditions. All fuel blends showed better emissions than that of diesel in both ways. Utilising jojoba biodiesel producer gas dual fuel mode, emission parameters like CO2, smoke and NOx are higher as compared to diesel producer gas operation. At optimal load condition, smoke emission for preheated oil producer gas dual fuel operation is 62% higher than the diesel producer gas mode. Diesel savings for diesel producer gas operation fetch up to 83% when correlated with B20 biodiesel producer gas blend up to 81.6%, at optimal load condition. Hence, it might be concluded that jojoba biodiesel producer gas up to 20% blend, i.e. B20, can be utilised as potential fuel for presenting diesel engine without much engine modification. Nevertheless, in the second case, with an increase in gas flow rate, all blended fuels showed better emissions with respect to diesel. The current paper also recommends further investigation to improve fuel properties and in-cylinder
combustion phenomena of jojoba biodiesel before its usage in a dual fuel operated diesel engine.