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Abbreviations
AR
Air Reactor
CCS
Carbon Capture and Storage
CFB
Circulating Fluidized Bed
CFD
Computational Fluid Dynamics
CLC
Chemical Looping Combustion
CLOU
Chemical Looping with Oxygen Uncoupling
CSTR
Continuously Stirred Tank Reactor
FR
Fuel Reactor
iG-CLC
In situ Gasification-CLC
OC
Oxygen Carrier
PFR
Plug Flow Reactor
S
Siphon/loop seal
SP
Standpipe
Nomenclature
a
Decay constant in the freeboard region (–)
Ar
Archimedes number (–)
A r
Cross-sectional area of reactor (m
2 )
a s
Share ratio of flow which is in inner cyclone vortex (–)
a t
Ratio of interfacial area between bubble and suspension phase to the
volume of a reactor element (1/m)
C
Weir coefficient (–)
C b,l
Gas concentration of gas component l in bubble phase (mol/m
3 )
C d,l
Gas concentration of gas component l in dense suspension phase
(mol/m
3 )
C f,l
Gas concentration of gas component l in the freeboard (mol/m
3 )
c v
Solids concentration (–)
c v,i,∞
Solids concentration above the transport disengagement height (–)
c v,mf
Solids concentration at minimum fluidization velocity (–)
c v,suspension Solids concentration in the dense suspension phase (–)
D
Molar binary diffusion coefficient (m
2 /s)
D c
Cyclone design parameter (–)
d*
Cyclone cut size diameter (m)
d i,p
Average particle size in class i (m)
d p
Particle diameter (m)
d v
Bubble size (m)
d v,0
Initial bubble size (m)
E a
Activation energy for the reaction (J)
F g
F d gravitational and drag force (kg m/s
2 )