Carbon Capture

A method of separating acidic gases from a gaseous mixture containing such acidic gases, the method comprising contacting the gaseous mixture with a dispersion of from 5 to 49% by weight of the dispersion of at least one organic base and from 10% to 90% by weight of the dispersion of a base oil, the dispersion further comprising 0.1% to 10% by weight of the dispersion, of at least one surfactant, said method comprising:

• a. providing, charging or loading a vessel with a composition comprising a dispersion of at least one organic base and a base oil, the dispersion further comprising at least one surfactant;
• b. introducing a gaseous mixture to the vessel, said gaseous mixture comprising acidic sulphur dioxide, nitrogenous oxides and/or carbon dioxide gases;
• c. removing the gaseous mixture from contact with or introduction to the dispersion,
• d. transferring the dispersion to a desorber, and/or
• e. heating the dispersion to a temperature from 20° C. to 100° C. above the dispersion temperature of the gaseous mixture when the gaseous mixture contacted the dispersion, to release the separated acidic gas;
• wherein:
• i. the at least one organic base is selected from Piperazine, N-Methyldiethanolamine, Monoethanolamine, 2-Amino-2-methyl-1-propanol, Diethanolamine, 1-Piperazineethanol, Diisopropanolamine, 2-(Methylamino)ethanol, 2-(Dimethylamino)ethanol, 1-Piperazineethanamine, 2-(Ethylamino)ethanol, (2-Hydroxyethyl)ethylenediamine, 1-Methylpiperazine, 2-Methylpiperazine, 1,4-Piperazinediethanol, Diethylenetriamine, 3-Amino-1-propanol, Piperidine, Ethylenediamine, Triethylenetetramine, N-Methyl-1,3-propanediamine, 2,2-Dimethyl-1,3-propanediamine, (±)-1-Amino-2-propanol, Triethylamine, Tetraethylenepentamine, Dabco, 1-Ethylpiperazine, 2,2′-(1,2-Ethanediyldiimino)bis[ethanol], Putrescine, Morpholine, Diethylamine, Tris(2-aminoethyl)amine, (±)-2-Amino-1-propanol, 2-Aminoethylpiperazine, 1,3-Diamino-2-propanol, Hexahydro-2,4,6-trimethyl-1,3,5-triazine, Propylenediamine, and mixtures thereof;
• ii. the at least one surfactant comprises the reaction product or mixture of a poly(olefin) succinic acid and/or poly(olefin) succinic anhydride with an organic amine, wherein wherein the poly(olefin) succinic acid or anhydride is selected from poly(isoprene) succinic acid, poly(isoprene) succinic anhydride, poly(isobutylene) succinic acid, poly(isobutylene) succinic anhydride or a mixture or combination thereof, and wherein the organic amine is selected from N-Methyldiethanolamine, Monoethanolamine, 2-Amino-2-methyl-1-propanol, Diethanolamine, 1-Piperazineethanol, Triethanolamine, Diethylethanolamine, Diisopropanolamine, Diglycolamine, 2-(Methylamino)ethanol, 2-(Dimethylamino)ethanol, 1-Piperazineethanamine, 2-(Ethylamino)ethanol, (2-Hydroxyethyl)ethylenediamine, 1,4-Piperazinediethanol, Diethylenetriamine, 3-Amino-1-propanol, Triethylenetetramine, (±)-1-Amino-2-propanol, Tetraethylenepentamine, 2,2′, -(1,2-ethanediyldiimino)bis[ethanol], Tris(2-aminoethyl)amine, (±)-2-Amino-1-propanol, 2-Aminoethylpiperazine, or mixtures thereof;
• preferably wherein the organic amine is selected from N-Methyldiethanolamine, Monoethanolamine, Diethanolamine, 1-Piperazineethanol, Diethylethanolamine, 1-Piperazineethanamine, Tetraethylenepentamine and mixtures thereof;
• iii. the base oil comprises one or more Group I base stocks, Group II base stocks, Group III base stocks, Group IV base stocks.