Use of Carbon Steel for Construction of Post-combustion CO₂ Capture Facilities: A Pilot-Scale Corrosion Study

Abstract

Corrosion studies were carried out on metal coated and noncoated carbon steel as well as stainless steel in a pilot-scale post-combustion CO2 capture process. Aqueous 30 wt % monoethanolamine (MEA) solvent was used without any chemical additive for antioxidation to examine a worst-case scenario where corrosion is not mitigated. The corrosion rate of all carbon steels was almost zero in the absorber column and CO2 lean amine piping except for Ni-coated carbon steel (<1.8 mm/yr). Ni2Al3/Al2O3 precoated carbon steels showed initial protection but lost their integrity in the stripping column and CO2 rich amine piping, and severe corrosion was eventually observed for all carbon steels at these two locations. Stainless steel was found to be stable and corrosion resistant in all of the sampling locations throughout the experiment. This study provides an initial framework for the use of carbon steel as a potential construction material for process units with relatively mild operating conditions (temperature less than 80 °C), such as the absorber and CO2 lean amine piping of a post-combustion CO2 capture process. It also warrants further investigation of using carbon steel with more effective corrosion mitigation strategies for process units where harsh environments are expected (such as temperatures greater than 100 °C).

Experimental and Theoretical Investigation of Thiazolyl Blue as a Corrosion Inhibitor for Copper in Neutral Sodium Chloride Solution

“…In Table 1 , the values of C dl and C f decrease with the increase of MTT, which can be explained by Equations (5) and (6) [ 38 ]: where S is the surface area of the electrode exposed to the corrosive solution, F is the Faraday’s constant, ε 0 is the permittivity constant of the air, ε is the local dielectric constant of the film, and d is the thickness of the electric double layer. As more corrosion inhibitor molecules replace water molecules occupying the active sites with the increase of MTT concentration, which cause distinct electric double layer thickness increases, the area of copper electrode exposed to corrosion solution and local dielectric constant ( ε ) decreases [ 39 ]. The values of R ct and R p both have a reverse change, suggesting that the corrosion reaction is inhibited effectively.…”

Advanced Theory and Simulation to Guide the Development of CO2 Capture Solvents

“…To help the design of corrosion inhibitor, various molecular modeling methods including DFT, MD and Monte Carlo (MC) simulations, artificial neural networks (ANN), and quantitative structure–activity relationship (QSAR) modeling have been employed to test the effectiveness of a wide range of organic corrosion inhibitors, as illustrated in detail in recent review articles. , In addition, theoretical and computational modeling methods have explored several less corrosive ionic liquids for both pre- and postcombustion CO 2 capture, − but a thorough understanding of solvent blends of different compounds still needs to be addressed. The use of carbon steel has also been studied to reduce the capital cost in carbon capture by replacing the costly stainless steel with less expensive materials. , The use of water-lean solvents can partially alleviate this corrosion issue; however, the CrO coating that is commonly used to reduce corrosion is a known oxidative catalyst for alcohols and amines, two chemical moieties that are ubiquitous in water-lean solvents.…”

Comparación de la velocidad de corrosión del acero A-36 recubierto con nanopartículas de ZnO y TiO 2 utilizando la resistencia de polarización lineal

“…In the case of a non-autonomous procedure, the effects of healing are activated by an outside source that becomes the cause of compound reactions that are useful for bonding. For the current study A-36 low carbon steel is used that has a density of 7800 kg•m -3 , Young's modulus value of 200 GPa, Poisson's ratio of 0.26, and shear modulus of 75 GPa (Dai et al, 2017;Li et al, 2017). Many authors investigated the corrosion rate of material using experimental methods like linear polarization resistance (LPR), weight-loss method, etc.…”