Objective
This article delineates the list of impurity species currently available in MSE and MSE-SRK, which are typical of CO2-rich streams in CCTUS applications.
Disclaimer: The following lists pertain to OLI software Version 12.5.
MSE (V12.5)
| Impurities that may cause acid (sulfuric or nitric) formation and corrosion or elemental sulfur dropout | • H2O • H2S • O2 • NOx (N2O, NO, N2O3, NO2, N2O5) • SOx (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 • Light hydrocarbons (C1-C6) interactions with sulfuric acid species • Ar |
| 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 • CO • H2 |
| Solids | • Elemental sulfur • Solid H2SO4 and HNO3 • Salts associated with acid dropout in the presence of other impurities (e.g., ammonium sulfates) |
MSE-SRK (V12.5)
| Impurities that may cause acid (sulfuric or nitric) formation and corrosion or elemental sulfur dropout | • H2O • H2S • O2 |
| Impurities that do not cause acid dropout, but alter the phase behavior | • Alcohols (methanol) • Some Hydrocarbons • N2 • Ar |
| Other impurities, such as heavy metal or non-condensable gases, that cause other transport challenges | • Hg • CO • H2 |
Upcoming Software Release
The following impurities for CO2-rich streams will be available in the MSE framework in the next software release:
| Impurities that do not cause acid dropout, but alter the phase behavior | • Methyl species (CH3ONO, CH3ONO2) • Methanol interactions with SOx and NOx |
| Solids | • Nitrosyl sulfuric acid (NOHSO4) |