MULTI-STAGE AMMONIA-BASED DECARBONIZATION
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United States of America Patent
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Issued Date -
Nov 23, 2023
app pub date -
May 16, 2023
filing date -
May 20, 2022
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Abstract
Multi-stage ammonia-based decarbonization, characterized in that ammonia is used as an absorbent to absorb CO2 in a process gas in an absorber, and the absorber may include four or more stages of absorption, where a first-stage absorption, a second-stage absorption, a third-stage absorption, a fourth-stage absorption, and higher-stage absorptions may be sequentially arranged along the flow direction of the process gas; and the temperature of the process gas in the second and third-stage absorptions may be controlled not to be lower than the temperature of the process gas in the first-stage absorption, and the temperature of the process gas in the fourth and any higher-stage absorptions may be controlled to be lower than the temperature of the process gas in the first-stage absorption.
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