Corrosion and degradation in MEA based post-combustion CO2 capture

Abstract

Two of the main challenges in post-combustion CO2 capture with ethanolamine are solvent degradation and material corrosion. It has been shown that there is a correlation between degradation and corrosion. The present paper examines this correlation by studying the effect of 10 MEA degradation products on corrosion. Thermal degradation experiments were conducted under stripper conditions for 5 weeks. 30wt% MEA solution with 1wt% of the various degradation products were placed in 316 SS cylinders and stored in a thermostat chamber at 135 °C. ICP-MS was used for the metal concentration analyses for all the solutions, while ion chromatography was used for the quantitative determination of heat stable salts anions and MEA concentrations. The solutions were also analyzed for degradation products in order to study the formation and thermal stability of these compounds. For corrosion monitoring, in addition to ICP-MS analyses, SEM-EDS was used for examining the cylinders surface morphology and elemental composition while XRD was used for corrosion product identification. In the present paper, the influence of the secondary degradation products on corrosion is studied. Results show that some specific degradation products, like bicine, HeGly and HEEDA enhance corrosion while others don't seem to have a significant effect on corrosion of stainless steel.

Energy Consumption for CO2 Capture by means of the Calcium Looping Process: A Comparative Analysis using Limestone, Dolomite, and Steel Slag

“…However, Boundary Dam (100 MWe) in Canada is up to date the only commercial CFPP that applies CCS using chemical absorption by monoethanolamine (MEA). The expansion of this mature technology for CO 2 capture at a large scale is hindered by a number of challenges such as amine toxicity and degradation, equipment corrosion, and the high energy consumption for sorbent regeneration . Thus, there is a need for developing new large‐scale capture technologies with reduced energy penalty and capture cost, which should rely on environmentally friendly, abundantly available, and inexpensive materials.…”

Microbiota in a cooling-lubrication circuit and an option for controlling triethanolamine biodegradation

“…In the CLC, bicine concentrations were monitored to serve as a proxy for cooling liquid decay and bacterial contamination since plant operators observed a correlation between bacterial abundance and bicine concentration. Several mechanisms for bicine formation have been proposed before, mainly in connection with gas treatment (Fytianos et al 2016). Oxidation of TEA or the influence of heat on methyldiethanolamine or diethanolamine can accelerate bicine formation (Lawson et al 2003).…”

Understanding and Modelling the Effect of Dissolved Metals on Solvent Degradation in Post Combustion CO2 Capture Based on Pilot Plant Experience

“…Several experimental studies report an increase in degradation rates due to concentrations of dissolved metals [35,37,38,40]. However, no work has explicitly quantified this relationship.…”