Engine performance, exhaust emissions and combustion characteristics of a CI engine fuelled with croton megalocarpus methyl ester with antioxidant

Effect of antioxidant on the performance and emission characteristics of a diesel engine fueled with palm biodiesel blends

“…The addition of antioxidants to B20 reduces its calorific value further (Table 3). However, this contributes to decreasing the BSFC, a finding that is concordant with previous studies [24,25]. The addition of BHA and BHT to B20 resulted in mean reductions in BSFC of 0.64% and 0.18%, respectively.…”

“…With TBHQ, there was no significant change in smoke, HC, or NOx compared to the untreated fuel. Kivevele et al [25] Palm biodiesel/PME B20 20% PME + 80% B0 B20 + BHA 20% PME + 80% B0 + 1000 ppm BHA B20 + BHT 20% PME + 80% B0 + 1000 ppm BHT compared to stabilized biodiesel, while having little effect on CO, HC, and NOx emissions. However, at full load condition, stabilized biodiesel showed heat release similar to that of diesel.…”

“…Then the oxygen content of biodiesel comes into play, which enhances the combustion process. The oxygen content ensures a higher in-cylinder combustion temperature, promoting more complete combustion and thereby greater conversion of CO to CO 2 than for diesel fuel [25]. Addition of the antioxidants BHA and BHT produced mean increases in CO emission of 12.3% and 8.6% compared to B20.…”

Influence of metal contaminants and antioxidant additives on storage stability of biodiesel produced from non-edible oils of Eastern Africa origin (Croton megalocarpus and Moringa oleifera oils)

“…The most remarkable feature of C. megalocarpus oil biodiesel was the cold flow properties; it yielded a cloud point (CP) and pour point (PP) of À4 and À9°C, respectively [15,16]. Kivevele and Mbarawa [2], Kivevele et al [17,18] and Kivevele and Huan [13] studied the production of biodiesel from C. megalocarpus and M. oleifera and also investigated their oxidation stability. It was found that biodiesel made from C. megalocarpus was rich in polyunsaturated fatty acids (78.5%) displaying lower oxidation stability than M. oleifera which had high percentage of saturated fatty acids (26.5%).…”

Effects of antioxidants on oxidation and storage stability of Croton megalocarpus biodiesel

“…They observed that addition of antioxidants greatly improved the stability. Kivevele et al [20] reported that although addition of antioxidants greatly improved the oxidative stability of croton biodiesel, it had little effects on engine exhaust emissions.…”