.TransiEnt.Components.Gas.Reactor.Base.PartialFixedbedReactorIdealGas_L4

Information

1. Purpose of model

This partial model represents a discretized fixed bed reactor with reaction kinetics with constant effectiveness factors.

2. Level of detail, physical effects considered, and physical insight

The reactor is discretized and in each volume mass, impulse and energy balances are solved. These equations are taken from Nandasana et al. [1] except that the pressure loss is assumed to be constant and the effective reaction rates are calculated using constant effectiveness factors. Also the mass balances are stationary

so changes in density are neglected.

3. Limits of validity

The model is valid if the changes of the effectiveness factors and the pressure loss are negligible.

4. Interfaces

gasPortIn: ideal gas inlet

gasPortOut: ideal gas outlet

heat: heat port

5. Nomenclature

T[N_cv] "Gas and catalyst temperature in the control volumes"

p[N_cv] "Pressure in the control volumes"

xi[N_cv,N_comp-1] "Mass fraction in the control volumes"

6. Governing Equations

The used equations are described in [1] except for the changes described in 2. The pressure calculation for each volume can be done either using the pressure in the middle or at the end of the volume.

7. Remarks for Usage

(no remarks)

8. Validation

(no remarks)

9. References

[1] Nandasana, Anjana D.; Ray, Ajay K.; Gupta, Santosh K. (2003): Dynamic Model of an Industrial Steam Reformer and Its Use for Multiobjective Optimization. In: Ind. Eng. Chem. Res. 42 (17), S. 4028–4042. DOI: 10.1021/ie0209576.

10. Version History

Model created by Carsten Bode (c.bode@tuhh.de) on Tue Apr 05 2016