US 12,465,882 B2
Carbon dioxide capture
Malcolm Hillel, Derby (GB); Philip Butler, Ashbourne (GB); and Christopher Clay, Derby (GB)
Assigned to ROLLS-ROYCE plc, London (GB)
Appl. No. 18/025,953
Filed by ROLLS-ROYCE plc, London (GB)
PCT Filed Aug. 23, 2021, PCT No. PCT/EP2021/073220
§ 371(c)(1), (2) Date Mar. 13, 2023,
PCT Pub. No. WO2022/058125, PCT Pub. Date Mar. 24, 2022.
Claims priority of application No. 2014830 (GB), filed on Sep. 21, 2020.
Prior Publication US 2023/0347276 A1, Nov. 2, 2023
Int. Cl. B01D 53/04 (2006.01); G21D 1/02 (2006.01)
CPC B01D 53/0462 (2013.01) [B01D 2253/206 (2013.01); B01D 2257/504 (2013.01); B01D 2258/06 (2013.01); G21D 1/02 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A system for capture of atmospheric carbon dioxide, comprising:
a carbon dioxide capture device having a capture medium operable to capture atmospheric carbon dioxide under a first set of thermodynamic conditions, and to release carbon dioxide under a second set of thermodynamic conditions different to the first set of thermodynamic conditions, the first set of thermodynamic conditions comprising a first temperature range and the second set of thermodynamic conditions comprising a second temperature range;
a heat engine configured receive a working fluid at an inlet temperature and arranged to discharge at least a portion of the working fluid at a discharge temperature in the second temperature range or higher;
a heat transfer arrangement configured to convey heat from discharged working fluid to the capture medium to release carbon dioxide therefrom, wherein the heat transfer arrangement comprises a heat exchanger configured to transfer heat from the working fluid to a separate, secondary fluid that conveys heat to the capture medium.
 
14. A method of capturing atmospheric carbon dioxide, comprising:
generating steam;
expanding the steam through a steam turbine and producing a steam exhaust;
directing heat from the steam exhaust to a direct air carbon capture plant;
transferring the heat in a heat exchanger configured to transfer heat from the steam to a separate, secondary fluid that conveys the heat to a carbon dioxide capture medium; and
desorbing, by the heat, the carbon dioxide captured in the capture medium in the direct air carbon capture plant.