AMMONIA CAPTURE AND RECYCLE IN AN AMMONIA CRACKER
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United States of America Patent
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Issued Date -
Oct 17, 2024
app pub date -
Apr 12, 2023
filing date -
Apr 12, 2023
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Abstract
A method of separating and reusing unconverted ammonia from cracked ammonia gas provided by an ammonia cracking unit is provided. The method includes introducing a cracked ammonia gas stream into a water wash column, thereby producing a clean gas stream and a water-containing effluent stream and introducing the water-containing effluent stream into a stripping column, thereby producing a cleaned wash water stream and a recovered ammonia stream. Wherein the cracked ammonia gas stream has an ammonia concentration of between 0.003 mol % and 10 mol %. Wherein the clean gas stream has an ammonia concentration of between 1 10 ppm and 2500 ppm. And wherein at least a portion of the recovered ammonia stream is used as fuel within the ammonia cracking unit.
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