In a combined steel manufacturing facility, NH3 found in coke oven gas is generally salvaged as_________________?
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Answer: A. (NH4)2SO4
Explanation
Ammonia in coke oven gas is recovered by scrubbing the gas stream with sulfuric acid. The chemical reaction precipitates ammonium sulfate salt which is separated and dried. Ammonium sulfate serves as an excellent nitrogen and sulfur containing agricultural fertilizer. Coke oven gas is a byproduct of destructive distillation of coal in steel manufacturing plants. Scrubbing towers remove basic ammonia vapors to prevent corrosion and air pollution. Chemical recovery systems turn steel mill waste gases into valuable commercial byproducts.
Integrated steel mills optimize resource recovery by capturing chemical byproducts from coking ovens. Agricultural markets consume large amounts of ammonium sulfate for crop fertilization. Environmental regulations mandate the removal of toxic ammonia and sulfur compounds from industrial gases. Ammonium chloride is produced via alternative chemical routes rather than standard coke oven scrubbing. Ammonium nitrate is manufactured by neutralizing nitric acid with synthetic ammonia. Liquid ammonia requires high pressure refrigeration systems rather than simple acid scrubbing.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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