Amidoximes: promising candidates for CO(2) capture

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Monoethanolamine (MEA) dominates power plant carbon dioxide (CO2) scrubbing processes, though with major disadvantages such as a 8-35% energy penalty. Here we report that structurally comparable amidoximes are promising CO2 capture agents based on RIMP2 electronic structure calculations. This was experimentally verified by the synthesis and testing of representative amidoximes for capture efficiencies at pressures as high as 180 bar. Acetamidoxime, which has the highest percent amidoxime functionality showed the highest CO2 capacity (2.71 mmol g(-1)) when compared to terephthalamidoxime (two amidoximes per molecule) and tetraquinoamidoxime (four amidoximes per molecule). Polyamidoxime surpassed activated charcoal Norit RB3 for CO2 capture per unit surface area. Adsorption isotherms exhibit Type IV behavior and acetamidoxime found to increase CO2 capture with temperature, a less observed anomaly. Porous amidoximes are proposed as valuable alternatives to MEA.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2011-11
Language
English
Article Type
Article
Citation

ENERGY ENVIRONMENTAL SCIENCE, v.4, no.11, pp.4528 - 4531

ISSN
1754-5692
DOI
10.1039/c1ee02264d
URI
http://hdl.handle.net/10203/97768
Appears in Collection
EEW-Journal Papers(저널논문)CBE-Journal Papers(저널논문)
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