公开(公告)号：US20240278176A1

公开(公告)日：2024-08-22

申请号：US18566897

申请日：2022-05-31

申请人： CONSEJO SUPERIOR DE INVESTIGACIONES CIENTÍFICAS (CSIC)

发明人： Juan Carlos ABANADES GARCÍA ,  Borja ARIAS ROZADA ,  José Ramón FERNÁNDEZ GARCÍA

IPC分类号： B01D53/62 ,  B01D53/96 ,  C01B3/16 ,  C01B3/40 ,  C01B32/50 ,  C01F11/06 ,  C04B2/10 ,  C04B2/12 ,  F27B1/00 ,  F27B1/04

CPC分类号： B01D53/62 ,  B01D53/96 ,  C01B3/16 ,  C01B3/40 ,  C01B32/50 ,  C01F11/06 ,  C04B2/108 ,  C04B2/12 ,  F27B1/005 ,  F27B1/04 ,  B01D2251/404 ,  B01D2257/504 ,  B01D2258/0233 ,  B01D2258/0283 ,  C01B2203/0233 ,  C01B2203/0283 ,  C01B2203/1058 ,  C01B2203/1076 ,  F27M2003/03

摘要： This invention discloses a calcination process to produce high purity CO2 from solids containing CaCO3 which operates cyclically and continuously on the solids, arranged in a packed or a moving bed, and wherein each cycle comprises a first step where the combustion at atmospheric pressure of a fuel in the bed of solids containing CaCO3 heats them up to 800-900° C. and a second step wherein a vacuum pressure between 0.05 and 0.5 atm is applied to extract pure CO2 from the solids containing CaCO3 while cooling them by 30-200° C. Said combustion can be carried out directly with air, oxygen enriched air or O2/CO2 mixtures when the process is applied to the calcination of a continuous flow of limestone in a moving bed shaft kiln. The process is also applied to calcine CaCO3 formed in reversible calcium looping processes comprising a carbonation reaction step to form CaCO3 from CaO.