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Simulation of the Carbonate Looping Process for Post‐Combustion CO 2 Capture from a Coal‐Fired Power Plant
Author(s) -
Ströhle J.,
Lasheras A.,
Galloy A.,
Epple B.
Publication year - 2009
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.200800569
Subject(s) - fluidization , fluidized bed combustion , chemical looping combustion , power station , process engineering , combustion , coal , calcium looping , carbonate , waste management , fraction (chemistry) , absorption (acoustics) , fluidized bed , mass fraction , pilot plant , coal combustion products , process (computing) , chemistry , environmental science , engineering , materials science , computer science , adsorption , metallurgy , sorbent , chromatography , composite material , operating system , electrical engineering , organic chemistry
The present contribution focuses on the carbonate looping process, i.e., post‐combustion CO 2 capture by means of CaO containing solid sorbents in a system of two circulating fluidized bed reactors. Material and energy balances were performed using the ASPEN PLUS TM software. Two different modeling approaches are applied to the carbonator. First, the entire active fraction of CaO is assumed to be converted; second, the CO 2 absorption efficiency in the circulating fluidized bed is calculated using an analytical 1D model for fast fluidization. The absorption of SO 2 by CaO is taken into account. The overall plant efficiency depends on the mass flows of fresh limestone and circulating CaO. The process is shown to be economically feasible, having low energy penalties in comparison with other CO 2 capture technologies and it seems to be suited for retro‐fitting existing power plants.