公开(公告)号：US11731078B2

公开(公告)日：2023-08-22

申请号：US17525562

申请日：2021-11-12

Applicant: SAIPEM S.P.A.

Inventor： Sylvain Lefebvre ,  Richard Surprenant ,  Ferrere Clerveaux ,  Gabriel Veilleux ,  David Zhang

IPC: B01D51/10 ,  B01D53/14 ,  B01D53/50 ,  B01D53/62 ,  B01D53/96

CPC classification number: B01D53/502 ,  B01D51/10 ,  B01D53/1406 ,  B01D53/1475 ,  B01D53/62 ,  B01D53/96 ,  B01D2251/304 ,  B01D2251/306 ,  B01D2251/606 ,  B01D2255/804 ,  B01D2258/0283

Abstract: A desulfurization gas process includes water vapor, CO2 and SOx (x=2 and/or 3). In a treatment unit, the gas contacts a cooled alkaline aqueous solution having a temperature lower than an initial gas temperature, water and a carbonate of an alkali metal, to cool the gas, condense some water vapor and absorb SOx in the carbonate-containing solution, produce an SOx-depleted gas and an acidic aqueous solution including sulfate and/or sulfite ions. The SOx-depleted gas and a portion of the acidic aqueous solution can then be withdrawn from the treatment unit. Carbonate of the alkali metal can be added to remaining acidic aqueous solution to obtain a made-up alkaline aqueous solution. This solution can be cooled and reused as the cooled alkaline aqueous solution. An SOx absorbent solution includes a bleed stream from a CO2-capture process, sodium or potassium carbonate, and an acidic aqueous solution obtained from desulfurization.

公开(公告)号：US11202988B2

公开(公告)日：2021-12-21

申请号：US16637217

申请日：2018-08-10

Applicant: SAIPEM S.P.A.

Inventor： Sylvain Lefebvre ,  Richard Surprenant ,  Ferrere Clerveaux ,  Gabriel Veilleux ,  David Zhang

IPC: B01D53/50 ,  B01D53/14 ,  B01D53/62 ,  B01D53/96 ,  B01D51/10

Abstract: A desulfurization gas process includes water vapor, CO2 and SOx (x=2 and/or 3). In a treatment unit, the gas contacts a cooled alkaline aqueous solution having a temperature lower than an initial gas temperature, water and a carbonate of an alkali metal, to cool the gas, condense some water vapor and absorb SOx in the carbonate-containing solution, produce an SOx-depleted gas and an acidic aqueous solution including sulfate and/or sulfite ions. The SOx-depleted gas and a portion of the acidic aqueous solution can then be withdrawn from the treatment unit. Carbonate of the alkali metal can be added to remaining acidic aqueous solution to obtain a made-up alkaline aqueous solution. This solution can be cooled and reused as the cooled alkaline aqueous solution. An SOx absorbent solution includes a bleed stream from a CO2-capture process, sodium or potassium carbonate, and an acidic aqueous solution obtained from desulfurization.