Alcohol Combustion Which fuel is best

[Tido611]

What I have to do is find out which fuel would be best to use as an automotive fuel. My choices are methanol ethanol and propanol.

My guess so far is propanol because it has a molar enthalpy of combustion of 2021kJ/mol which is close to double ethanol (1367kJ/mol) but it needs much more oxygen as to burn without emmissions(carbon, sut)

But ethanol is much easier to make, says my teacher, and it also burns cleaner much easier.So right now I am kinda torn so and info or opinions would benift greaty.

 

[Astronuc]

Rather than calculate enthalpy/mole, determine enthalpy/kg, and also look at density - how much mass and volume must be transported.

Also, consider volatility (vapor pressure), and toxicity. Ethanol is the least toxic of the three.

 

[Blueshift5]

I would recommend considering various factors when determining the best fuel for automotive use. The molar enthalpy of combustion is certainly an important factor as it indicates the amount of energy released during combustion. However, there are other factors to consider such as the availability and cost of the fuel, its impact on the environment, and its compatibility with existing automotive technology.

Methanol has a high molar enthalpy of combustion and can be easily produced from natural gas. However, it is highly toxic and can cause damage to engine components. Ethanol, on the other hand, has a lower molar enthalpy of combustion but is renewable and can be easily produced from crops such as corn or sugarcane. Propanol has the highest molar enthalpy of combustion among the three options, but it is not as readily available and may require modifications to existing automotive engines.

In terms of emissions, ethanol is known to burn cleaner than both methanol and propanol. It produces less carbon monoxide and hydrocarbon emissions, making it a more environmentally friendly option.

Ultimately, the best fuel choice may depend on the specific needs and priorities of the automotive industry. It is important to consider not only the energy output but also the environmental impact and feasibility of production and use. Further research and testing may be needed to determine the most suitable fuel for automotive use.