Modeling of CO2 absorption into 4-diethylamino-2-butanol solution in a membrane contactor under wetting or non-wetting conditions

In this work, 4-diethylamino-2-butanol (DEAB) as a new type of alkanolamine solvent is used for CO2 capture in a hollow fiber membrane contactor (HFMC). A model describing the gas and liquid reactions and transport inside the membrane contactor under the wetting or non-wetting conditions was built....

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Bibliographic Details
Published in:Carbon Capture Science & Technology 2022-12, Vol.5, p.100069, Article 100069
Main Authors: Yuan, Cuiting, Li, Linlin, Li, Yifu, Pan, Zhen, Zhang, Na, Borhani, Tohid N., Zhang, Zhien
Format: Article
Language:English
Subjects:
4-diethylamino-2-butanol
Carbon capture
Membrane contactor
Natural gas
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Summary:In this work, 4-diethylamino-2-butanol (DEAB) as a new type of alkanolamine solvent is used for CO2 capture in a hollow fiber membrane contactor (HFMC). A model describing the gas and liquid reactions and transport inside the membrane contactor under the wetting or non-wetting conditions was built. The countercurrent flow of natural gas and solvent was considered in the model. To investigate the influence of solvent type on decarburization efficiency, DEAB was used and compared with other common solvents such as potassium carbonate (K2CO3), triethylamine (TEA) and diethanolamine (DEA). Under the same operating conditions, the impact of parameters such as humidity, gas flow rate, liquid concentration, membrane length on the decarburization performance was examined. The results indicate that DEAB solvent had the best overall performance especially under the wetting conditions. It was noted that increasing liquid concentration, membrane length and decreasing gas flow rate enhanced decarburization.
ISSN:2772-6568
2772-6568
DOI:10.1016/j.ccst.2022.100069