Premium
CO 2 capture in a multistage CFB: Part II: Riser with multiple cooling stages
Author(s) -
Boonprasop Sutthichai,
Gidaspow Dimitri,
Chalermsinsuwan Benjapon,
Piumsomboon Pornpote
Publication year - 2017
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.15777
Subject(s) - flue gas , fluidized bed combustion , materials science , sorbent , heat exchanger , stack (abstract data type) , power station , nuclear engineering , coal , waste management , mechanics , environmental science , petroleum engineering , thermodynamics , mechanical engineering , engineering , chemistry , adsorption , physics , organic chemistry , computer science , programming language
A 1 m in diameter and 3.55 m tall fluidized bed riser internally with water tubes, which required six equilibrium stage of riser‐sorber for capturing about 95% of CO 2 emitted from a coal power plant, were designed to replace the multisingle risers. At the optimum operating condition, the temperature of the cooling tubes in the bottom, the middle and the top of the riser were kept constant values at 50, 40, and 30°C, respectively. The hot water (57°C) from lowest exchanger section can be used to preheat the spent sorbent for the regeneration in a downer. The rest of the heat for the regenertion is obtained from the stack gas (100–130°C). This new concept promises to reduce the energy consumption for CO 2 removal from flue gas. The only energy requirement is for pumping fluid and fluidizing particles in the bed. © 2017 American Institute of Chemical Engineers AIChE J , 63: 5280–5289, 2017