(a) Explain why solid fuels must be pulverised and liquid fuels atomised in modern combustion systems (b) What is the H C range for common fossil fuels and how does this ratio affect the combustion stochiometric AFR and CO2 emissions Give two examples How does this ratio affect the radiative heat transfer from the flames (c) For combustion of octane in air (i) Sketch plots showing concentration of the three combustion products, H2O, CO2,and CO, against flame temperature (1000K to 3000K) for 1 2 For each molecule state its origin(s) and explain why they depend on temperature (ii) Explain how the CO emissions would change over the same temperature range for 0 8 and why (iii) In which of the above conditions would you get the highest NO and why

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Question: (a) Explain why solid fuels must be pulverised and liquid fuels atomised in modern combustion systems. (b) What is the H/C range for common fossil

(a) Explain why solid fuels must be pulverised and liquid fuels atomised in modern combustion systems.

(b) What is the H/C range for common fossil fuels and how does this ratio affect the combustion stochiometric AFR and CO2 emissions? Give two examples. How does this ratio affect the radiative heat transfer from the flames?

(i) Sketch plots showing concentration of the three combustion products, H2O, CO2,and CO, against flame temperature (1000K to 3000K) for = 1.2. For each molecule state its origin(s) and explain why they depend on temperature.

(ii) Explain how the CO emissions would change over the same temperature range for = 0.8 and why.

(iii) In which of the above conditions would you get the highest NO and why?

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