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Carbon dioxide capture using solid sorbents in a fluidized bed with reduced pressure regeneration in a downer
Author(s) -
Kongkitisupchai Sunti,
Gidaspow Dimitri
Publication year - 2013
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.14215
Subject(s) - flue gas , regenerative heat exchanger , scrubber , fluidized bed , fluidized bed combustion , waste management , power station , process engineering , pressure drop , wet scrubber , inlet , carbon dioxide , chemical engineering , materials science , heat exchanger , chemistry , engineering , mechanics , mechanical engineering , physics , electrical engineering , organic chemistry
The most common technology for postcombustion CO 2 capture for existing power plants is the amine solvent scrubber. The energy consumption for capturing CO 2 from flue gases using amine solvent technology is 15 to 30% of the power plant electricity production. Hence, there is a need to develop more efficient methods of removing CO 2 . Here, we show a novel design, obtained using multiphase CFD, and of a fluidized‐bed reduced pressure regenerator, coupled with a fluidized‐bed sorber, which has the potential to reduce the energy consumption. The undesirable core‐annular flow regime in the riser‐sorber is eliminated using multiple jet inlets and large particles leading to a shorter height. Up to 88% of the heat liberated in the riser‐sorber is recovered in the downer‐regenerator. © 2013 American Institute of Chemical Engineers AIChE J , 59: 4519–4537, 2013