Abstract
The roles of O2 and SO2 in the degradation of aqueous monoethanolamine (MEA) in the concentration range of 5 - 7 kmol/m3 were investigated using simulated flue gas containing O2 of 6 - 100%, and SO2 concentration in the range of 10?11 ? 11 ppm, as typically present in polished flue gas streams, at degradation temperatures in the range of 328 - 393 K. An analysis of a power law rate expression formulated to represent the degradation process showed that the degradation was most susceptible to O2 followed by MEA and then SO2. SO2 played a significant role by giving rise to additional MEA oxidative degradation. An increase in O2 and SO2 concentrations, the initial MEA concentration, and temperature all resulted in an increase of the degradation rate.
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