Session: Corrosion in Carbon Capture, Transportation, and Utilization and Storage (CCTUS) (Part II of III)
Oxidation of nitrogen monoxide in CO2 streams (C2026-00026)
Wednesday, March 18, 2026
1:30 PM - 2:00 PM Central
Location: 342 DE
Earn .5 PDH
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Full-scale implementation of carbon capture and storage (CCS) will require transportation of large quantities of CO2. The captured CO2 may contain additional constituents (impurities), depending on the CO2 source and the capturing technique . Certain combinations and concentrations of reactive impurities can result in formation of corrosive species, or dropout of solid or liquid phases in the CO2-stream, and work is therefore in progress to establish a safe CO2-specification. Many combinations and concentrations of impurities have therefore been tested experimentally. These tests typically dose low concentrations (ppm-levels) of water, SOx, NOx and O2 in a CO2-stream to study the chemical reactions. However, NOx has mostly been introduced as NO2, even if several other nitrogen oxides may be present in captured CO2 – or they may be formed through various chemical reactions. The present work studied the chemical reactions that occurred when water, H2S, SO2 and O2 were mixed together with NO in liquid CO2. The results showed that NO and O2 reacts to form NO2. NO2 reacted with other impurities, like H2S, causing a series of different reactions. Dropouts were formed in a CO2-blend containing 5 ppm H2S, 5-10 ppm O2 and 5 ppm NO with and without water present.
