Elucidating the corrosion of carbon steel in hybrid monoethanolamine solutions containing methanol or n-methyl-2-pyrrolidone
DOI:
https://doi.org/10.55713/jmmm.v35i2.2157Keywords:
CO2 absorption, Carbon steel corrosion, CO2 capture, Hybrid MEA solutionAbstract
Corrosion has been a persistent issue in carbon dioxide (CO2) absorption unit that needs to be resolved in order to prolong the life span of the absorber unit. In this regard, understanding the corrosion behaviour, particularly in hybrid monoethanolamine (MEA) solutions, is crucial. This study aims to give detail information on the role of different process parameters, encompassing types of amine solution, temperature, and CO2 loading on the corrosion behaviour of carbon steel in system containing hybrid solution of monoethanolamine (MEA) and methanol (MeOH) or N-methyl-2-pyrrolidone (NMP). Here, the corrosion extent of the carbon steel was evaluated using gravimetric experiments. The results indicated that the corrosion rate of carbon steels, when submerged in various amine solutions, increased with higher solution temperatures and the presence of CO2. In line with the Raman spectroscopy results and the surface morphology analysis, results also showed that the carbon steel coupons immersed in MEA+MeOH had the lowest corrosion rate.
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