Raw coke oven gas contains approximately _____________ gm/Nm3 of ammonia.
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Answer: B. 5
Explanation
Ammonia is released from the nitrogen compounds in coal during the carbonization process. Industrial measurements show typical raw gas concentrations hover around five grams per cubic meter. Chemical scrubbing systems are designed to capture approximately this specific mass of ammonia. Coke oven gas is a complex mixture generated by heating coal without oxygen. Nitrogen present in the original coal structure breaks down into volatile ammonia gas. Normal cubic meters measure gas volumes corrected to standard temperature and pressure conditions.
Ammonia recovery is vital for producing commercial ammonium sulfate fertilizers in industrial plants. Removing ammonia prevents corrosion in downstream gas distribution pipelines and equipment components. Environmental regulations strictly limit ammonia emissions from steel manufacturing facility operations. Option A underestimates the typical ammonia concentration found in standard coke oven gas streams. Option C overestimates the baseline ammonia concentration by an order of magnitude. Option D represents an unrealistically high concentration that exceeds normal operating plant data.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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