Table 2.
Relative variations in performance and emissionssaboutmethyl estermixture B20 at full load ((+) indicates of increase and (−) of decrease).
| Relative change (%) | B20 + 25 TiO2 (%) | B20 + Al2O3 (%) | B20 + 25 TiO2 + 25 Al2O3 (%) |
|---|---|---|---|
| Specific fuel consumption | − 4 | − 6 | − 11 |
| Thermal efficiency | + 4.5 | + 6.5 | + 12.5 |
| Exhaust gas temperature | + 5 | + 7 | + 12 |
| HC emission | − 7 | − 13 | − 20 |
| Carbon monoxide emission | − 6 | − 12 | − 16 |
| Smoke concentration | − 8 | − 15 | − 21 |
| NOx concentration | + 7 | + 15 | + 23 |
| Peak cylinder pressure, bar | + 1.3 | + 2 | + 2.5 |
| Peak heat release rate, Joule/CA | + 1.3 | + 2.2 | + 3.3 |
| Ignition delay | − 7 | − 10 | − 14 |