Solvent degradation in a major factor in the cost associated with carbon capture using amine solution. Heat stable salts (HSS) from oxidative amine degradation and acidic flue gas components, including SO2, NOx and HCl can accumulate in amine solvents and lead to corrosion, extra energy requirements and reduced capture efficiency. Accurate and reliable quantitation of HSS concentration is essential to monitor solvent degradation and corrosion. Two separate amine solvents were tested in a 0.1MWth carbon capture pilot plant.  30% MEA was used as a baseline solvent and compared to an amine solvent currently under development, CAER B2. Six HSS were identified in each solvent and the accumulation rates were determined and were similar in magnitude to other published amine based CO2 capture plant data. The 30% MEA solvent accumulates HSS at nearly twice the rate (48 ppm/hr vs. 22 ppm/hr) as the CAER B2.

Degradation and heat stable salt formation during solvent development in a pilot-scale CO<sub>2</sub> capture process using coal combustion flue gas

245th National Meeting (2013)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.

Degradation and heat stable salt formation during solvent development in a pilot-scale CO2 capture process using coal combustion flue gas

Degradation and heat stable salt formation during solvent development in a pilot-scale CO₂ capture process using coal combustion flue gas