Results from MEA testing at the CO2 Technology Centre Mongstad. Part II: Verification of baseline results

Independent verification protocol (IVP) work has been conducted at the CO2 Technology Centre Mongstad (TCM DA) during treatment of flue gas from a natural gas-fired combined heat and power (CHP) plant. The testing applied an aqueous 30 wt% monoethanolamine (MEA) solvent system treating flue gases with a flow rate of about 47.000 Sm3/hr and a CO2 content of about 3.5%. The CO2 capture rate was about 90% and the thermal steam consumption was about 4.1 GJ/t CO2. Emissions of MEA were very low and MEA-related degradation products were all below detection levels, and all within the emission limits set by the Norwegian environmental authorities. The current work may be considered an independently verified baseline for a non- proprietary post-combustion amine based solvent system carried out at an industrial-scale plant facility. Long-term performance indices, such as material corrosion, MEA solvent degradation, etc., have not been considered in the current IVP work. Additional minor process adaption to the aqueous MEA solvent system, such as increased MEA concentrations, the use of anti-foam solutions, etc., may lead to lower thermal steam consumptions than aforementioned.