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Experimental investigation of a circulating fluidized‐bed reactor to capture CO 2 with CaO
Author(s) -
Rodríguez N.,
Alonso M.,
Abanades J. C.
Publication year - 2011
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.12337
Subject(s) - calcium looping , flue gas , sorbent , fluidized bed combustion , fluidized bed , waste management , process engineering , nuclear engineering , fluidization , environmental science , scaling , materials science , chemical engineering , chemistry , engineering , adsorption , mathematics , geometry , organic chemistry
Calcium looping processes for capturing CO 2 from large emissions sources are based on the use of CaO particles as sorbent in circulating fluidized‐bed (CFB) reactors. A continuous flow of CaO from an oxyfired calciner is fed into the carbonator and a certain inventory of active CaO is expected to capture the CO 2 in the flue gas. The circulation rate and the inventory of CaO determine the CO 2 capture efficiency. Other parameters such as the average carrying capacity of the CaO circulating particles, the temperature, and the gas velocity must be taken into account. To investigate the effect of these variables on CO 2 capture efficiency, we used a 6.5 m height CFB carbonator connected to a twin CFB calciner. Many stationary operating states were achieved using different operating conditions. The trends of CO 2 capture efficiency measured are compared with those from a simple reactor model. This information may contribute to the future scaling up of the technology. © 2010 American Institute of Chemical Engineers AIChE J, 57: 000–000, 2011