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). (Figure Presented).
|Number of pages||12|
|Journal||Industrial and Engineering Chemistry Research|
|State||Published - Apr 26 2017|
Bibliographical noteFunding Information:
The authors would like to acknowledge the Department of Energy National Energy Technology Laboratory (NETL) for the primary financial support of this project (DE-FE0007395). Additional financial support was provided by Louisville Gas & Electric (LG&E) and Kentucky Utilities (KU), Duke Energy, Electric Power Research Institute (EPRI), Kentucky Power, and the Kentucky Department of Energy Development and Independence (KY-DEDI). The authors would like to thank the UKy-CAER technical and operations staff including Len Goodpaster, Otto Hoffmann, Marshall Marcum, Andy Placido, and Amanda Warriner as well as Roger Perrone for the machining of the corrosion racks. The authors would also like to thank everyone at KU E.W. Brown Station for serving as the host site and for their support of this project.
© 2017 American Chemical Society.
ASJC Scopus subject areas
- Chemistry (all)
- Chemical Engineering (all)
- Industrial and Manufacturing Engineering