CO₂ Impurities Available in MSE and MSE-SRK

Impurities that may cause acid (sulfuric or nitric) formation and corrosion or elemental sulfur dropout

• H₂O

• H₂S

• O₂

• NO_x (N₂O, NO, N₂O₃, NO₂, N₂O₅)

• SO_x (SO₂, SO₃)

Impurities that do not cause acid dropout, but alter the phase behavior

• Alcohols (methanol, monoethylene glycol, diethylene glycol, triethylene glycol)

• Hydrocarbons (CH₄, C₂H₆)

• Aldehydes (formaldehyde, acetaldehyde)

• COS

• N₂

Potential inhibitors

• Amines (MEA, DEA, DMEA, DMIPA, MDEA, piperazine, DGA, alkyl amines, oxygenated amines)

• NH₃ (also a potential solid former, i.e., NH₂CO₂NH₄)

Other impurities, such as heavy metal or non-condensable gases, that cause other transport challenges

• Hg

Solids

• Elemental sulfur

Impurities that may cause acid (sulfuric or nitric) formation and corrosion or elemental sulfur dropout

• H₂O

• H₂S

Impurities that do not cause acid dropout, but alter the phase behavior

• Alcohols (methanol)

• Some Hydrocarbons

• N₂

Other impurities, such as heavy metal or non-condensable gases, that cause other transport challenges

• Hg

Impurities that do not cause acid dropout, but alter the phase behavior

• Light hydrocarbons (C1-C6) interactions with sulfuric acid species

• Ar

Other impurities such as heavy metal or non-condensable gases that cause other transport challenges

• CO

• H₂

Solids

• Solid H₂SO₄ and HNO₃

• Salts associated with acid dropout in the presence of other impurities (e.g., ammonium sulfates)

Impurities that may cause acid (sulfuric or nitric) formation and corrosion or elemental sulfur dropout

• O₂

Impurities that do not cause acid dropout, but alter the phase behavior

• Ar

• N₂

Other impurities such as heavy metal or non-condensable gases that cause other transport challenges

• CO

• H₂