A method has been investigated for regeneration of CO2-saturated monoethanolamine (MEA) aqueous solution at low temperature and atmospheric pressure, with a rapid regeneration rate and low evaporation solution loss. The solution of 50 wt % MEA, 35 wt % water, and 15 wt % glycol was saturated with CO2 through addition of dry ice, and the regeneration rate was measured as a function of temperature and flow rate of an inert gas through the solution in a packed bubble reactor. An infrared CO2 detector was used to measure the CO2 concentration in the flushing gas to determine total percent regeneration over a period of time at a given temperature. The bubbling flow through the reactor was found to greatly enhance the regeneration rate and total amount of regeneration. It is possible with the packed bubble reactor to regenerate MEA solutions to 40% CO2 at temperatures below 90°C.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering