Solid properties¶
This property package provides the solid phase properties for the chemical looping combustion of an iron-based oxygen carrier. The components modeled are Fe2O3, Fe3O4, and Al2O3.
Flow basis: Mass
Units: SI units
State Variables:
The state block supports the following state variables:
Component mass flowrate in kg/s,
Particle porosity in (dimensionless),
Component mass fraction in (dimensionless),
Temperature in K
Lists:
Component list - [Fe2O3, Fe3O4, Al2O3]
Shomate parameter list - [1 to 8]
Parameters:
Parameter Name |
Symbol |
Description |
Units |
Reference |
---|---|---|---|---|
|
\(mw_{j}\) |
Molecular weights of solid components indexed by component list |
kg/mol |
[1] |
|
\(\rho_{skeletal,j}\) |
Skeletal density of solid components indexed by component list |
kg/m3 |
[1] |
|
\(CP_{j,i}\) |
Heat capacity parameters indexed by component list and shomate list |
J/ mol.K |
[1] |
|
\(H_{form,j}\) |
Component molar heats of formation indexed by component list |
J/mol |
[1] |
|
\(d_{p}\) |
Diameter of solid particles |
m |
[2] |
|
\(v_{mf}\) |
Velocity at minimum fluidization |
m/s |
[2] |
|
\(\varepsilon_{mf}\) |
Voidage at minimum fluidization |
None |
[2] |
|
\(k_{sol}\) |
Thermal conductivity of solid particles |
kJ/m.K.s |
[2] |
Variables:
Variable Name |
Symbol |
Description |
Units |
---|---|---|---|
|
\(F_{mass}\) |
Component mass flowrate |
kg/s |
|
\(\phi\) |
Porosity of oxygen carrier |
None |
|
\(x_{j}\) |
Component mass fractions indexed by component list |
None |
|
\(T\) |
Temperature |
K |
|
\(\rho_{skeletal}\) |
Skeletal density of oxygen carrier |
kg/m3 |
|
\(\rho_{particle}\) |
Particle density of oxygen carrier |
kg/m3 |
|
\(c_{p,mol,j}\) |
Pure component solid heat capacities indexed by component list |
J/mol.K |
|
\(c_{p,mass}\) |
Mixture heat capacity, mass-basis |
J/kg.K |
|
\(H_{mol,j}\) |
Pure component enthalpies indexed by component list |
J/mol |
|
\(H_{mass}\) |
Mixture specific enthalpy |
J/kg |
Methods:
Sum of component fractions:
Skeletal density of oxygen carrier:
Particle density of oxygen carrier:
Molar heat capacity of component, see reference [1]:
Mass heat capacity of oxygen carrier:
Molar enthalpy of component, see reference [1]:
Mass enthalpy of oxygen carrier:
References:
National Institute of Standards and Technology, NIST Chemistry WebBook, (n.d.). (accessed March 10, 2018).
Stevens R., Newby R., Shah V., Kuehn N., Keairns D., Guidance for NETL’s oxycombustion R&D program: Chemical looping combustion reference plant designs and sensitivity studies, 2014.