Multi-scale study of hydrodynamics in an interconnected fluidized bed for the chemical looping combustion process

RSC Advances ◽  
2015 ◽  
Vol 5 (66) ◽  
pp. 53404-53411 ◽  
Author(s):  
Shuai Wang ◽  
Juhui Chen ◽  
Huilin Lu ◽  
Guodong Liu ◽  
Liyan Sun
Keyword(s):  
Fluidized Bed ◽  
Bubble Diameter ◽  
Combustion Process ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Multi Scale ◽  
Variation Range

The variation range of bubble diameter in the FR is narrow compared to that in the AR.

Multi-scale simulation of chemical looping combustion in dual circulating fluidized bed

2015 ◽  
Vol 155 ◽  
pp. 719-727 ◽  
Author(s):  
Shuai Wang ◽  
Juhui Chen ◽  
Huilin Lu ◽  
Guodong Liu ◽  
Liyan Sun
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Multi Scale

Optimizing the Fuel Reactor for Chemical Looping Combustion

2003 ◽  
Author(s):  
Juan Ada´nez ◽  
Francisco Garci´a-Labiano ◽  
Luis F. de Diego ◽  
Ainhoa Plata ◽  
Javier Celaya ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Oxygen Carrier ◽  
Bubble Diameter ◽  
Operating Conditions ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Oxygen Carriers ◽  
Solid Contact ◽  
Fuel Reactor ◽  
Contact Efficiency

A mathematical model for a bubbling fluidized bed has been developed to optimize the performance of the fuel reactor in chemical looping combustion systems. This model considers both the hydrodynamic of the fluidized bed (dense bed and freeboard) and the kinetics of the oxygen carrier reduction. Although the model is valid for any of the possible oxygen carriers and fuels, the present work has been focused in the use of a carrier, CuO-SiO2, and CH4 as fuel. The shrinking core model has been used to define the particle behavior during their reduction. The simulation of the fuel reactor under different operating conditions was carried out to set the operating conditions and optimize the process. The effect of different design or operating variables as the bed height, the oxygen carrier/fuel ratio, and the gas throughput was analyzed. Finally, a sensitivity analysis to the solid reactivity, the bubble diameter, and to the gas/solid contact efficiency in the freeboard was done. At vigorous fluidization, solid present in the freeboard can strongly contribute to the gas conversion in the fuel reactor. However, the gas/solid contact efficiency in this zone must be determined for each particular case.

A Multi-Scale Approach for Reverse Engineering Chemical Looping Combustion

2019 ◽  
Author(s):  
Matthias Schnellmann ◽  
Stuart Scott ◽  
Gareth Williams ◽  
John S. Dennis
Keyword(s):  
Reverse Engineering ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Multi Scale

scholarly journals Investigation of biomass alkali release in a dual circulating fluidized bed chemical looping combustion system

Fuel ◽  
2021 ◽  
Vol 297 ◽  
pp. 120743
Author(s):  
Ivan Gogolev ◽  
Toni Pikkarainen ◽  
Juho Kauppinen ◽  
Carl Linderholm ◽  
Britt-Marie Steenari ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Circulating Fluidized Bed ◽  
Chemical Looping Combustion ◽  
Chemical Looping ◽  
Combustion System
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