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Mechanistic Modeling of Carbon Steel Corrosion in a Methyldiethanolamine (MDEA)-Based Carbon Dioxide Capture Process
Y. S. Choi; D. L. Duan; S. L. Jiang; S. Nesic
2013
Source PublicationCorrosion
ISSN0010-9312
Volume69Issue:6Pages:551-559
AbstractA predictive model was developed for corrosion of carbon steel in carbon dioxide (CO2)-loaded aqueous methyldiethanolamine (MDEA) systems, based on modeling of thermodynamic equilibria and electrochemical reactions. The concentrations of aqueous carbonic and amine species (CO2, bicarbonate [HCO3-], carbonate [CO32-], MDEA, and protonated MDEA [MDEAH(+)]) as well as pH values in the MDEA solution were calculated. The water chemistry model showed a good agreement with experimental data for pH and CO2 loading, with an improved correlation upon use of activity coefficients. The electrochemical corrosion model was developed by modeling polarization curves based on the given species's concentrations. The required electrochemical parameters (e. g., exchange current densities, Tafel slopes, and reaction orders) for different reactions were determined from experiments conducted in glass cells. Iron oxidative dissolution, HCO3- reduction, and MDEAH(+) reduction reactions were implemented to build a comprehensive model for corrosion of carbon steel in an MDEA-CO2- water (H2O) environment. The model is applicable to uniform corrosion when no protective films are present. A solid foundation is provided for corrosion model development for other amine-based CO2 capture processes.
description.department[choi, yoon-seok ; nesic, srdjan] ohio univ, dept chem & biomol engn, inst corros & multiphase technol, athens, oh 45701 usa. [duan, deli ; jiang, shengli] chinese acad sci, inst met res, shenyang 110016, peoples r china. ; choi, ys (reprint author), ohio univ, dept chem & biomol engn, inst corros & multiphase technol, athens, oh 45701 usa. ; choiy@ohio.edu
KeywordCarbon Capture And Storage Carbon Dioxide Capture Carbon Steel Corrosion Model Mdea Heat-stable Salts Aqueous-solutions Co2 Separation Mild-steel Solubility Mea Mdea Absorption Behavior Systems
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71174
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Y. S. Choi,D. L. Duan,S. L. Jiang,et al. Mechanistic Modeling of Carbon Steel Corrosion in a Methyldiethanolamine (MDEA)-Based Carbon Dioxide Capture Process[J]. Corrosion,2013,69(6):551-559.
APA Y. S. Choi,D. L. Duan,S. L. Jiang,&S. Nesic.(2013).Mechanistic Modeling of Carbon Steel Corrosion in a Methyldiethanolamine (MDEA)-Based Carbon Dioxide Capture Process.Corrosion,69(6),551-559.
MLA Y. S. Choi,et al."Mechanistic Modeling of Carbon Steel Corrosion in a Methyldiethanolamine (MDEA)-Based Carbon Dioxide Capture Process".Corrosion 69.6(2013):551-559.
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