New Amines for CO2 Capture. IV. Degradation, Corrosion, and Quantitative Structure Property Relationship Model

Degradation of 22 compounds was evaluated in stainless steel batch reactors at 140 °C for 14 days under a pressure of 0.5 MPa (mixture of 75% CO2, 20% N2, and 5% O2). For each run, two corrosion coupons, one carbon steel (XC38) and one stainless steel (304Ti), were immersed in aqueous solutions of amines to determine corrosion due to degraded solutions. Two additional coupons were put in the vapor phase above solutions. At the end of the run, corrosion rates were evaluated through weight-loss measurements. The amounts of remaining starting material were determined with a quantitative gas chromatography method. Corrosion and degradation data were compared with those of a benchmark molecule (MEA, monoethanolamine), tested under the same conditions. Results indicate that some molecules are less corrosive and have a better chemical stability than MEA. In addition, a quantitative structure property relationship (QSPR) model was built that can be applied to predict compound degradation.

[1]  P. Carrette,et al.  New Amines for CO2 Capture. III. Effect of Alkyl Chain Length between Amine Functions on Polyamines Degradation , 2010 .

[2]  P. Carrette,et al.  New Amines for CO2 Capture. I. Mechanisms of Amine Degradation in the Presence of CO2 , 2009 .

[3]  Michel Tenenhaus,et al.  PLS generalised linear regression , 2005, Comput. Stat. Data Anal..

[4]  J. Martens,et al.  Experimental and statistical modeling study of low coverage gas adsorption of light alkanes on meso-microporous silica , 2012 .

[5]  B. Gierczyk,et al.  Reaction of some strong N-bases with chloropentafluorobenzene in the presence of water molecules. , 2003, The Journal of organic chemistry.

[6]  Paitoon Tontiwachwuthikul,et al.  Analysis of Monoethanolamine and Its Oxidative Degradation Products during CO2 Absorption from Flue Gases: A Comparative Study of GC-MS, HPLC-RID, and CE-DAD Analytical Techniques and Possible Optimum Combinations , 2006 .

[7]  P. Carrette,et al.  New Amines for CO2 Capture. II. Oxidative Degradation Mechanisms , 2009 .

[8]  Jean-Pierre Gauchi,et al.  Selecting both latent and explanatory variables in the PLS1 regression model , 2003 .

[9]  Gary T. Rochelle,et al.  Oxidative Degradation of Monoethanolamine , 2002 .

[10]  Curt M. White,et al.  Degradation Pathways for Monoethanolamine in a CO2 Capture Facility , 2003 .

[11]  Paitoon Tontiwachwuthikul,et al.  Corrosion in MEA units for CO2 capture: Pilot plant studies , 2009 .

[12]  A. Meisen,et al.  Degradation of aqueous DEA solutions in a heat transfer tube , 1984 .

[13]  P. Jurs,et al.  Development and use of charged partial surface area structural descriptors in computer-assisted quantitative structure-property relationship studies , 1990 .