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Fuel Quality Relationship with Emissions
Fuel properties can affect emissions directly as well as indirectly. Some fuel components by themselves may pose health hazards or adversely influence the environment. Some other fuel properties influence engine combustion and engine durability, while some other properties accelerate deterioration in the performance of emission control devices and systems. These fuel quality- emission interactions are given in Table 8.3
| Table 8.3 |
| Fuel Quality Interactions with Emissions |
| Type of Interactions |
Gasoline characteristics |
Diesel characteristics |
| Direct emission of pollutants |
Lead content, Front end volatility, vapour pressure, benzene content |
Sulphur, Poly aromatic hydrocarbon content |
| Effect on combustion |
Octane number, volatility, oxygen content, final boiling point |
Cetane number, Viscosity, Density, Volatility (mid – and tail-end boiling points), aromatic content |
| Effect on engine cleanliness and maintenance |
Lead content, Final boiling point, Oxidation stability, Storage stability, Corrosion resistance |
Tail-end volatility and final boiling point, Carbon residue, Sulphur content, Oxidation and storage stability, Sediments |
| Durability of emission control devices |
Lead content, Sulphur, Sediments |
Sulphur |
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