Particle Mixing in Bubbling Fluidized Bed Reactors with Immersed Heat Exchangers and Continuous Particle Exchange

2020 ◽  
Vol 59 (44) ◽  
pp. 19736-19750
Author(s):  
Christoph Eder ◽  
Gerhard Hofer ◽  
Julius Beer ◽  
Tobias Pröll
Keyword(s):  
Fluidized Bed ◽  
Heat Exchangers ◽  
Fluidized Bed Reactors ◽  
Particle Mixing ◽  
Bubbling Fluidized Bed ◽  
Particle Exchange ◽  
Continuous Particle

Particle mixing in bubbling fluidized bed reactors with continuous particle exchange

2019 ◽  
Vol 195 ◽  
pp. 585-597 ◽  
Author(s):  
G. Hofer ◽  
T. Märzinger ◽  
C. Eder ◽  
F. Pröll ◽  
T. Pröll
Keyword(s):  
Fluidized Bed ◽  
Fluidized Bed Reactors ◽  
Particle Mixing ◽  
Bubbling Fluidized Bed ◽  
Particle Exchange ◽  
Continuous Particle

CFD-DEM Modeling of CO2 Capture using Alkali Metal-Based Sorbents in a Bubbling Fluidized Bed

2014 ◽  
Vol 12 (1) ◽  
pp. 441-449 ◽  
Author(s):  
Zhonglin Zhang ◽  
Daoyin Liu ◽  
Yaming Zhuang ◽  
Qingmin Meng ◽  
Xiaoping Chen
Keyword(s):  
Fluidized Bed ◽  
Gas Flow ◽  
Fluidized Bed Reactors ◽  
Solid Sorbents ◽  
Bubbling Fluidized Bed ◽  
Shrinking Core ◽  
Simulation And Experiment ◽  
Kinetics Simulation ◽  
Reaction Processes ◽  
Back Mixing

Abstract This paper describes a CFD-DEM modeling of CO2 capture using K2CO3 solid sorbents in a bubbling fluidized bed, which takes into heat transfer, hydrodynamics, and chemical reactions. Shrinking core model is applied in reaction kinetics. Simulation and experiment results of bed pressure drop and CO2 concentration in the reactor exit agree well. Instantaneous dynamics as well as time-averaged profiles indicate detailed characteristics of gas flow, particle motion, and chemical reaction processes. The simulation results show an obvious core-annular flow and strong back-mixing flow pattern. CO2 concentration decreases gradually along the bed height, while regards on the lateral distribution CO2 concentration near the wall is lower than that in the middle zone where gas passes through faster. The effect of bubbles on CO2 reaction is two-sided: it can promote mixing which strengthens reaction, while it can be a short pass of gas which is not beneficial to reaction. The simulation is helpful for further understanding and optimal design of fluidized bed reactors of CO2 capture.

Sign in / Sign up

Export Citation Format

Share Document