Journal
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
Volume 29, Issue -, Pages 16-21Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijggc.2014.07.008
Keywords
Amine degradation; Carbon dioxide; Sterically hindered alkanolamine; 2-Amino-2-hydroxymethyl-1,3-propanediol; Piperazine; High-performance liquid chromatography
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Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- FRQNT Centre in Green Chemistry and Catalysis (CGCC)
- Centre de recherche en Catalyse et Chimie Verte (C3V, Laval University)
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The stability to thermal and oxidative degradation of five single amine aqueous solutions (2-amino-2-hydroxymethyl-1,3-propanediol (AHPD), piperazine (Pz), 2-amino-1,3-propanediol (Serinol), 2-amino-2-methyl-1-propanol (AMP) and monoethanolamine (MEA)) and one mixed aqueous solution (AHPD + Pz), in the absence and the presence of CO2, was investigated by high-performance liquid chromatography. The results showed that the presence of O-2 and CO2 influenced significantly the degree of thermal degradation. The sterically hindered alkanolamines investigated (AMP and AHPD) were found more resistant to thermal degradation than conventional (unhindered) amines. However, in the absence of CO2, the oxygen degraded them more significantly. The addition of Pz to AHPD solution reduces the AHPD oxidative degradation. It was concluded that AHPD + Pz amine aqueous blend could be a potentially interesting absorbent to replace MEA for industrial CO2 capture applications, especially using membrane contactors. (C) 2014 Elsevier Ltd. All rights reserved.
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