If an analysis of boiler flue gas determines...

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Question 1 of 205eccefa0bacbc34ba4d46e92

If an analysis of boiler flue gas determines there is 100% excess air for combustion, you should expect the flue gas to have a nitrogen content of approximately __________.

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5eccefa0bacbc34ba4d46e92

If an analysis of boiler flue gas determines there is 100% excess air for combustion, you should expect the flue gas to have a nitrogen content of approximately __________.

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🔍 Key Concepts

• Composition of dry air (percentages of oxygen and nitrogen by volume) • Meaning of 100% excess air in combustion calculations • How nitrogen behaves in the boiler furnace during combustion

💭 Think About

• Start from normal air: about 21% oxygen and 79% nitrogen by volume. If you use 100% excess air, how does the amount of nitrogen entering the furnace change compared to the theoretical air? • Consider that nitrogen is largely inert in the combustion process. Does it get consumed, or does it mostly pass through to the stack gas? • Think about what happens to the oxygen in excess air: some is used for combustion, some is left over. How does that affect the fraction of nitrogen in the final flue gas compared with its fraction in the incoming air?

✅ Before You Answer

• Be clear on the approximate nitrogen fraction in normal air (by volume). • Remember that with 100% excess air, the total amount of air supplied is twice the theoretical air; the nitrogen supplied increases in the same proportion. • Check which option is closest to a realistic nitrogen fraction in flue gas after complete combustion with excess air, knowing that nitrogen largely passes through unchanged.

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Question 1 of 205eccefa0bacbc34ba4d46e92

If an analysis of boiler flue gas determines there is 100% excess air for combustion, you should expect the flue gas to have a nitrogen content of approximately __________.

Back

Question 1 of 20

5eccefa0bacbc34ba4d46e92

If an analysis of boiler flue gas determines there is 100% excess air for combustion, you should expect the flue gas to have a nitrogen content of approximately __________.

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed