1. Lower energy density: Alcohol has a lower energy density compared to diesel. This means that it produces less energy per unit volume, requiring a larger amount of alcohol to be used for the same amount of power output. As a result, the fuel efficiency of a diesel engine would be significantly reduced if alcohol were used.
2. Higher vapor pressure: Alcohol has a higher vapor pressure than diesel. This means that it evaporates more easily, forming vapors that can cause vapor lock in the fuel system. This can lead to difficulties in starting the engine, fuel starvation, and irregular engine operation.
3. Corrosiveness: Alcohol is corrosive to certain metals and materials used in diesel engines, such as aluminum and rubber components. Prolonged use of alcohol as a fuel can lead to damage and deterioration of these components, affecting the engine's performance and reliability.
4. Viscosity and lubrication: Alcohol has a lower viscosity and lubricity compared to diesel. This can result in inadequate lubrication of the moving parts in the engine, leading to increased wear and tear.
5. Octane rating: Diesel engines require fuel with a high cetane rating (typically above 40) for efficient combustion. Alcohol has a low cetane rating, meaning it ignites slower and is less suitable for diesel engines.
6. Emission characteristics: Alcohol combustion in diesel engines can produce higher emissions of certain pollutants, such as aldehydes and unburned hydrocarbons, compared to diesel fuel.
Due to these factors, alcohol is not a suitable fuel for diesel engines and can cause performance issues, damage to engine components, and increased emissions. Diesel engines are designed to run on diesel fuel, which has the appropriate properties and characteristics for efficient and reliable operation.
