Background and activities
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: http://www.vista.no/project/vis.html?tid=63287
Scientific, academic and artistic work
A selection of recent journal publications, artistic productions, books, including book and report excerpts. See all publications in the database
- (2017) The Nasal Geometry of the Reindeer Gives Energy-Efficient Respiration. Journal of Non-Equilibrium Thermodynamics. vol. 42 (1).
- (2017) Entropy Production Minimization as Design Principle for Membrane Systems: Comparing Equipartition Results to Numerical Optima. Industrial & Engineering Chemistry Research. vol. 56 (16).
- (2016) Enhancing the understanding of heat and mass transport through a cellulose acetate membrane for CO2 separation. Journal of Membrane Science. vol. 513.
- (2014) Extending the nonequilibrium square-gradient model with temperature-dependent influence parameters. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics. vol. 90 (3).