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Issue 12, 2015
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CO2 capture by dry alkanolamines and an efficient microwave regeneration process

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Abstract

Removal of acidic gases such as H2S and CO2 is performed during the purification of raw natural gas, most commonly using amine gas treatment. However, this industrially entrenched method is limited by significant shortcomings including low operational capture efficiency, amine pipeline corrosion and a large energy penalty due to the sorbent regeneration process. To address these shortcomings, we have studied the use of perfluorinated silica-stabilized dry alkanolamines (DAf) for CO2 capture. Due to their micronized liquid domains, DAf display high operational CO2 capture efficiency. Further, to minimize energy requirements for sorbent regeneration, microwave-assisted regeneration of the spent DAf sorbent was also studied and shown to decrease the energy requirements by about ten times. In contrast to very recent work, our results show that the use of DAf exhibits extraordinary recyclability, with a negligible decrease in absorption capacity over at least ten absorption–regeneration cycles, indicating the potential of this material for gas treatment applications.

Graphical abstract: CO2 capture by dry alkanolamines and an efficient microwave regeneration process

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Publication details

The article was received on 18 Nov 2014, accepted on 16 Feb 2015 and first published on 17 Feb 2015


Article type: Paper
DOI: 10.1039/C4TA06273F
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J. Mater. Chem. A, 2015,3, 6440-6446
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    CO2 capture by dry alkanolamines and an efficient microwave regeneration process

    J. Yang, H. Y. Tan, Q. X. Low, B. P. Binks and J. M. Chin, J. Mater. Chem. A, 2015, 3, 6440
    DOI: 10.1039/C4TA06273F

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