Study on the Corrosion Mechanism of Air Cooler in a CO2 Removal System with Amine Solution

Journal of Chinese Society for Corrosion and protection

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Chun-Yu WANG²,Hao-Zhe JIN³

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Abstract Abstract: The corrosion leakage of air cooler in the CO2 removal system with amine solution has attracted much attention. In this paper, the Kent-Eisenberg(KE)model was used to establish the simulation model of low-amine liquid air cooler, and the variations of heat-stable salt, organic acid, CO2 and other corrosion media with the temperature(41.96℃-83.40℃) were analyzed by Aspen plus.The results show that the gas content in the first three rows of air cooler tube bundles is small, but the molar fraction of heat-stable salt and CO2 is 55% and 45%, respectively. In this paper, the Fluent software is used to analyze the flow characteristics in air-cooled tube bundles. The results show that the high-risk corrosion region are located at the inlet area of tube bundle numerbered as No.9~12、20、21、24、27~40, which is consistent with the actual corrosion location of the tube bundle during the operation of the lean amine liquid air cooler EC15401 in the factory.

Key words: Key words:heat-stabilized salt CO2 absorption KE model Lean amine liquid air cooler corrosion

Received: 21 May 2020

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中图分类号：TE624

Corresponding Authors: Hao-Zhe JIN

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Chun-Yu WANG Hao-Zhe JIN. Study on the Corrosion Mechanism of Air Cooler in a CO2 Removal System with Amine Solution. Journal of Chinese Society for Corrosion and protection, 0, (): 0-0.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y0/V/I/0

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