What percentage of CO₂ in a boiler flue gas...

Question 1 / 270705eccefa0bacbc34ba4d46e9b

Question 1 of 270705eccefa0bacbc34ba4d46e9b

What percentage of CO₂ in a boiler flue gas analysis would indicate perfect combustion?

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Question 1 of 27070

Q

What percentage of CO₂ in a boiler flue gas analysis would indicate perfect combustion?

🔍 Key Concepts

• Relationship between CO₂ percentage and excess air in combustion • Difference between no excess air (theoretical or perfect combustion) and excess air • Typical range of CO₂ values in flue gas for oil-fired or diesel-fired boilers at perfect vs. practical combustion

💭 Think About

• How does increasing excess air affect the percentage of CO₂ in flue gas: does it make CO₂ go up or down? • For perfect (theoretical) combustion with just enough air, would the CO₂ percentage be relatively high, very low, or zero? • Among the options, which value best represents a realistic CO₂ percentage in flue gas when there is no excess air?

✅ Before You Answer

• Remember that 0% CO₂ would mean no combustion products from carbon at all – is that realistic for a firing boiler? • Think about whether 0,12 (12%) CO₂ is a realistic upper limit for perfect combustion in marine boiler practice. • Consider that practical operation often uses excess air, giving CO₂ lower than the theoretical maximum – so which choice best fits the theoretical maximum CO₂ in flue gas?

Question 1 of 27070

Q

What percentage of CO₂ in a boiler flue gas analysis would indicate perfect combustion?

A

0

B

0,03

C

0,06

D

0,12

Question 1 / 270705eccefa0bacbc34ba4d46e9b

Question 1 of 270705eccefa0bacbc34ba4d46e9b

What percentage of CO₂ in a boiler flue gas analysis would indicate perfect combustion?

Back

Question 1 of 27070

Q

What percentage of CO₂ in a boiler flue gas analysis would indicate perfect combustion?

🔍 Key Concepts

• Relationship between CO₂ percentage and excess air in combustion • Difference between no excess air (theoretical or perfect combustion) and excess air • Typical range of CO₂ values in flue gas for oil-fired or diesel-fired boilers at perfect vs. practical combustion

💭 Think About

• How does increasing excess air affect the percentage of CO₂ in flue gas: does it make CO₂ go up or down? • For perfect (theoretical) combustion with just enough air, would the CO₂ percentage be relatively high, very low, or zero? • Among the options, which value best represents a realistic CO₂ percentage in flue gas when there is no excess air?

✅ Before You Answer

• Remember that 0% CO₂ would mean no combustion products from carbon at all – is that realistic for a firing boiler? • Think about whether 0,12 (12%) CO₂ is a realistic upper limit for perfect combustion in marine boiler practice. • Consider that practical operation often uses excess air, giving CO₂ lower than the theoretical maximum – so which choice best fits the theoretical maximum CO₂ in flue gas?