US 11,779,879 B2
Process and system for pretreating gaseous effluent for post-combustion CO2 capture
Florent Guillou, Rueil-Malmaison (FR); Berenice Moroy, Rueil-Malmaison (FR); and Vania Santos-Moreau, Rueil-Malmaison (FR)
Assigned to IFP Energies nouvelles, Rueil-Malmaison (FR)
Filed by IFP Energies nouvelles, Rueil-Malmaison (FR)
Filed on Jul. 13, 2021, as Appl. No. 17/374,312.
Claims priority of application No. 2008002 (FR), filed on Jul. 29, 2020.
Prior Publication US 2022/0040630 A1, Feb. 10, 2022
Int. Cl. B01D 53/96 (2006.01); B01D 53/14 (2006.01); B01D 53/40 (2006.01); B01D 53/62 (2006.01); B01D 53/78 (2006.01)
CPC B01D 53/1493 (2013.01) [B01D 53/1425 (2013.01); B01D 53/1475 (2013.01); B01D 2257/504 (2013.01); B01D 2258/0283 (2013.01)] 12 Claims
OG exemplary drawing
 
1. Process for separating at least one acidic gas contained in an incoming gaseous effluent, comprising at least the following steps:
contacting, in a separation unit, a cold gaseous effluent rich in acidic compounds with an absorbent solution low in acidic compounds so as to obtain a gaseous effluent low in acidic compounds and an absorbent solution rich in acidic compounds,
regenerating at least a fraction of the absorbent solution rich in acidic compounds in a regeneration column so as to obtain an absorbent solution low in acidic compounds and an effluent rich in acidic compounds, the absorbent solution low in acidic compounds being used in the step of contacting with the cold effluent rich in acidic compounds,
burning, in a combustion device, the incoming gaseous effluent with a fuel, so as to obtain a hot gaseous effluent rich in acidic compounds,
cooling the hot gaseous effluent rich in acidic compounds in an exchanger to give the cold effluent rich in acidic compounds used in the step of contacting with an absorbent solution low in acidic compounds,
introducing a fluid in high-pressure liquid form into the exchanger, from which a fluid in high-pressure vapour form is withdrawn, and
using the fluid in high-pressure vapour form as an energy source for operating the regeneration column by introducing the fluid in high-pressure vapour form into the regeneration column.