.TransiEnt.Producer.Gas.MethanatorSystem.EquilibriumModel.MethanationThreeStages

Information

1. Purpose of model

This model represents a three staged methanation reactor with intermediate cooling and a recirculation at the first reactor block

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

The detail of this model is the same as the detail of the single reactor blocks. The heat exchanger are simplified heat exchangers with a fixed output temperature. A detailed description is found in [1].

3. Limits of validity

4. Interfaces

gaPortsIn: input of process gas

gasPortOut: output of process gas

fluidPortIn: input of cooling fluid (e.g. water)

fluidPortOut: output of cooling fluid (e.g. water)

5. Nomenclature

6. Governing Equations

The recycle ratio defines the ratio of process gas that is recycled.

7. Remarks for Usage

The predefined parameter values come from a calibration with an input pressure of 25 bar and an input composition of 84.4884% CO2 and 15.5116% H2 which represents the composition for an ideal methanation. Herefore the recycle rate is calibrated to a value of 1.6, such that the hydrogen share in the product gas is always below 5 mol-% which is the maximum share according to the DVGW G 260/262 which regulated the conditions for the integration of gas into the natural gas grid in Germany.

8. Validation

Validated in [1] with data from [2].

9. References

[1] Schülting, Oliver - Vergleich von Power-to-Gas-Speichern mit Ziel der Rückverstromung unter derzeit gültigen technischen Restriktionen (Masterarbeit), Technische Universität Hamburg - Institut für Energietechnik, 2016

[2] Harms, Hans - Methanisierung kohlenmonoxidreicher Gase beim Energie-Transport, Chem.-Ing.-Tech, 1980

10. Version History

Model created by Oliver Schülting (oliver.schuelting@tuhh.de) in Nov 2019