Bakgrunn og aktiviteter

CO2 in natural gas has to be removed for several reasons. For instance, it lowers the heat of combustion, and it might freeze in the LNG pipelines. Nowadays several technologies are available for CO2 removal, but the membrane technology has some interesting advantages over its competitors, especially when combined with Enhanced Oil/Gas Recovery.

Several physical phenomena may affect the performance of a membrane module. To capture these effects and to provide a realistic description of the membrane module, a proper model has to be prepared.  

With realistic models for the process units, the next step is to incorporate these in the overall process design in the combination with EOR. Once a reliable reference has been established, we propose to use optimal control theory to find the most energy efficient state. The conservation equations of the membrane module are used as constraints and the total entropy production is the objective function. It is possible then to characterize the state corresponding to the most energy efficient operation and design. The methodology has never been applied to membrane processes, and a large potential for improvement is expected.

We are also working on a project in collabolartion with UiT, on the study of heat and mass exchange inside a reindeer nose. Reindeer are known to be able to survive under very harsh climatic conditions, and the efficincy of their breathing system plays a fundamental rolein the energy balance of the animal. Further knowledge on this system might guide the development of new and more efficient Nature-inspired ingeneering processes.

The project is financed by VISTA:

Vitenskapelig, faglig og kunstnerisk arbeid

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  • Magnanelli, Elisa; Wilhelmsen, Øivind; Johannessen, Eivind; Kjelstrup, Signe. (2014) Modelling of membrane units for CO2 separation with Non-Equilibrium Thermodynamics. 27th European Symposium on Applied Thermodynamics ; Eindhoven. 2014-07-06 - 2014-07-09.