Methyl Ethanol Amine MEA

Methyl Ethanol Amine (MEA) degrades in the presence of oxygen and COz, resulting in extensive amine loss and equipment corrosion as well as generating environmental impacts. Rochelle and Chi (2001), in their report on Oxidative Degradation of Monoethanolamine, explain the oxidation mechanism for MEA by Single Electron Oxidation as follows (Figure 13.4):

Peroxide radical

Peroxide

Hydroxyacetaidehyde

2hch + nh3 Formaldehyde

Figure 13.4 Degradation of MEA.

Once again, the above depiction does not account for the pathway followed by synthetic products. This is expressed through the £/(t) factor that includes all products, including matter accumulated from catalysts and other trace particles from various materials used during processing. If this factor were included in the above equation, the formaldehyde shown above would not be considered the same as the organic form of formaldehyde, even when the bulk concentration is the same. It is important to note that the bulk concentration is not a mitigating factor when it comes to long-term material properties that affect the environment and, ultimately, sustainability.

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