Electrochemical investigation of corrosion in CO2 capture plants—Influence of amines

CATEGORY: CORROSION
Electrochimica Acta, Available online 16 February 2013, In Press, Corrected Proof
Electrochemical investigation of corrosion in CO2 capture plants—Influence of amines
Pauline Pearson, Anthony F. Hollenkamp, Erik Meuleman
CSIRO Energy Technology, Bayview Avenue, Clayton, VIC 3168, Australia
Abstract
Post Combustion Capture (PCC) and storage of CO2 with amines appears to the best available technology for mitigation of rising atmospheric concentrations of CO2. However, a number of serious operational issues threaten its utility. Corrosion of PCC plant in which degradation of amines, particularly in the presence of oxygen, can lead to a range of corrosive products, represents one such issue.
Authors report a study using electrochemical methods to quantify the corrosiveness of well-known capture agents, such as monoethanolamine (MEA). Results are compared with novel solvent blends that have been developed at CSIRO. The amines used in the novel solvents also satisfy the standard PCC criteria of high rates of reaction with CO2, low energy requirements (for regeneration), low volatility and low toxicity.
The results of the corrosion tests on carbon steel reveal that reductions in corrosion rate, compared with those for MEA, are possible with the novel solvents.
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