Mechanistic Modeling of Carbon Steel Corrosion in a Methyldiethanolamine (MDEA)-Based Carbon Dioxide Capture Process

• Published in: Corrosion (Houston, Tex.) Vol. 69; no. 6; pp. 551 - 559
• Main Authors: CHOI, Yoon-Seok, DUAN, Deli, SHENGLI JIANG, NESIC, Srdjan
• Format: Journal Article
• Language: English
• Published: Houston, TX NACE International 01.06.2013
• Subjects: Activity coefficients; Amines; Applied sciences; Aqueous solutions; Bicarbonates; Carbon dioxide; Carbon sequestration; Carbon steel; Carbon steels; Carbonates; Chemical reactions; Chemical reduction; Coal-fired power plants; Coefficients; Construction; Corrosion; Corrosion environments; Corrosion potential; Corrosion tests; Electric currents; Electrochemical corrosion; Electrochemistry; Electrode polarization; Exact sciences and technology; Mathematical models; Metals. Metallurgy; Methyldiethanolamine; Modelling; pH effects; Prediction models; Reduction; Steel; Tafel slopes; Thermodynamic equilibrium; Uniform attack (corrosion); Water chemistry; USA, Texas, Houston; carbon capture and storage; corrosion model; Storage; Corrosion; Carbon dioxide; MDEA; carbon dioxide capture; Carbon steel; Modeling

A 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−],...