Ammonia emission from CO2 capture pilot plant using aminoethylethanolamine

Abstract

Amine post-combustion carbon capture technology is based on washing the flue gas with a solvent that captures CO 2 . Thus, a small fraction of this solvent can be released together with the cleaned flue gas. This release may cause environmental concerns, both directly and indirectly through subsequent solvent degradation into other substances in the atmosphere. The paper presents the ammonia emission from CO 2 capture pilot plant (1 tonne CO 2 per day) using 40 wt% aminoethylethanolamine solvent, along with the efficiency of the water wash unit. In addition, the temperature effect of lean amine entering the absorber on ammonia emission was studied. Furthermore, the concentrations of other compounds such as SO 2 , SO 3 , NO 2 , CS 2 and formaldehyde were monitored. The literature review on the NH 3 emission from a pilot plant using aminoethylethanolamine solvent has not been published. The results show that the main source of ammonia emission is the absorber and that emission (in the range 27-50 ppm) corresponds to typical NH 3 release from CO 2 capture pilot plant using an amine solvent. The emission of amines and amine degradation products is a complex phenomenon which is difficult to predict in novel solvents, and for this reason the significance of new solvents testing in a pilot scale has been highlighted.

Amine-Enhanced Methanesulfonic Acid-Driven Nucleation: Predictive Model and Cluster Formation Mechanism

“…One is to preliminarily predict the EP of emerging amines within the AD for MSA-driven nucleation. In this regard, with the emissions of volatile chemical products becoming an increased source of atmospheric volatile organic compounds (VOCs), , emerging amines such as aminoethylethanolamine , and 1,3-diphenylguanidine could enter into atmosphere, and therefore their possible EP for MSA-driven nucleation should be evaluated. Another application is to roughly evaluate the collective contribution of all atmospheric amines on MSA-driven nucleation, which can be realized by converting the EP of each atmospheric amine into one specific amine (e.g., MA).…”

Aerosol Emissions of Amine-Based CO2 Absorption System: Effects of Condensation Nuclei and Operating Conditions

“…Amine emissions after an absorber have been reported in many works − and can be divided into vapor-type and aerosol-type emissions. Vapor emissions obey Henry’s law and are mainly affected by the temperature of the flue gas and the composition of the solvent.…”

Understanding the physical and thermodynamic properties of monoethanolamine‐ionic liquids for solvent screening in CO2 capture process

“…Because of its higher absorption capacity and CO 2 reactivity, MEA is used as a benchmarking absorbent in the post‐combustion CO 2 collection process. However, it still has significant limitations such as solvent degradation, low thermal stability, oxygen‐induced equipment corrosion, high operating costs, and energy consumption 7–9 . Ionic liquids (ILs) have emerged as a viable alternative to MEA aqueous solution for removing CO 2 from flue gas in coal‐fired power plants 10,11 Minimum vapor loss, non‐volatility, and good thermal and chemical stability distinguish IL as a green and sustainable solvent for gas separation procedures 12,13 .…”

“…However, it still has significant limitations such as solvent degradation, low thermal stability, oxygen-induced equipment corrosion, high operating costs, and energy consumption. [7][8][9] Ionic liquids (ILs) have emerged as a viable alternative to MEA aqueous solution for removing CO 2 from flue gas in coal-fired power plants 10,11 Minimum vapor loss, non-volatility, and good thermal and chemical stability distinguish IL as a green and sustainable solvent for gas separation procedures. 12,13 When compared to MEA, some of the limitations of ILs include their greater viscosity and poorer CO 2 absorption capacity.…”