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mifarris
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Homework Statement
I want to figure out what pressure would need to be applied onto a 5% methane 95% air mixture to heat it up to the autoignition temp of 853 K.
Homework Equations
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mifarris said:Thank you very much for the link. Looks like I will find some useful information in this source!
The required pressure for this combustion to reach 853 K will depend on various factors such as the initial temperature, volume, and composition of the mixture. However, in general, a higher pressure is needed for a lower initial temperature and larger volume of the mixture. On average, a pressure of around 10-20 atmospheres (atm) is needed for this combustion to reach 853 K.
The percentage of methane in the mixture will have a direct impact on the required pressure for combustion. This is because methane is the main combustible component in the mixture and therefore, a higher percentage of methane will require a higher pressure for the combustion to occur. For example, if the percentage of methane is increased from 5% to 10%, the required pressure may increase from 10 atm to 15 atm.
Yes, the required pressure for combustion can be calculated using the ideal gas law, which states that pressure is directly proportional to temperature and volume. The formula for the ideal gas law is P = nRT/V, where P is pressure, n is the number of moles of gas, R is the gas constant, T is temperature, and V is volume. By rearranging this formula, we can calculate the required pressure for combustion based on the other known variables.
Heating the mixture to 853 K is important because it is the temperature at which the combustion reaction will occur and sustain itself. This is known as the ignition temperature. If the mixture is not heated to this temperature, the combustion reaction will not take place, and no energy will be produced.
Yes, there are several safety considerations to keep in mind when determining the required pressure for this combustion. Since high pressures are involved, it is important to ensure that all equipment and containers used for the combustion are properly designed and can withstand the pressure. Additionally, proper safety precautions should be taken to prevent any potential accidents or explosions during the combustion process.