quasi426 said:
Do you know him?Clausius2 said:Another possibility is to ask to F.A. Williams, the combustion expert of your University.You know, in some class, hand up and ask, and then you tell me what he says to you.
quasi426 said:
The ignition temperature refers to the minimum temperature at which a substance will ignite and sustain combustion. The ignition temperature of gasoline is approximately 257 degrees Celsius, while the ignition temperature of ethanol is about 360 degrees Celsius. This means that ethanol is more difficult to ignite than gasoline.
One reason for the higher ignition temperature of ethanol is its chemical composition. Ethanol contains a higher percentage of oxygen compared to gasoline, which makes it more resistant to ignition. Additionally, ethanol also has a lower vapor pressure, which means it requires a higher temperature to vaporize and ignite.
Yes, the ignition temperature can have an impact on the efficiency of fuel combustion. A higher ignition temperature means the fuel will require more heat to ignite, resulting in a longer ignition delay. This can lead to incomplete combustion and reduced fuel efficiency. However, other factors such as the engine design and fuel composition also play a role in combustion efficiency.
Yes, the higher ignition temperature of ethanol can pose safety concerns in certain situations. For example, in a car accident where the fuel tank may rupture, gasoline is more likely to ignite and cause a fire compared to ethanol. However, ethanol has a lower flammability limit, meaning it requires a certain concentration in the air to ignite, making it less likely to cause an explosion.
The ignition temperature of a fuel is primarily determined by its chemical composition. Therefore, altering the composition of gasoline or ethanol can potentially change their ignition temperatures. However, this can also affect other properties of the fuel and may not be a viable solution for practical purposes.