Membrane Reactor for Water Detritiation: a Parametric Study on Operating Parameters

Mascarade, Jérémy; Liger, Karine; Joulia, Xavier; Troulay, Michèle; Meyer, A.; Perrais, Christophe

doi:10.13182/fst14-t55

Cited by 1 publication

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“…The lumen and shell pressures were, respectively 2.5 bar and 0.5 bar. For each experiment, the dedeuteration factor (DF) was determined as the ratio of the amount of deuterium in the feed stream to the amount of remaining deuterium leaving the lumen [20]. Fig.…”

Section: Modeling Assessmentmentioning

confidence: 99%

On the study of catalytic membrane reactor for water detritiation: Modeling approach

Liger

Mascarade

Joulia

et al. 2016

Fusion Engineering and Design

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Experimental results for the conversion of tritiated water (using deuterium as a simulant of tritium) by means of a catalytic membrane reactor in view of tritium recovery.• Phenomenological 2D model to represent catalytic membrane reactor behavior including the determination of the compositions of gaseous effluents.• Good agreement between the simulation results and experimental measurements performed on the dedicated facility.• Explanation of the unexpected behavior of the catalytic membrane reactor by the modeling results and in particular the gas composition estimation.In the framework of tritium recovery from tritiated water, efficiency of packed bed membrane reactors have been successfully demonstrated. Thanks to protium isotope swamping, tritium bonded water can be recovered under the valuable Q 2 form (Q = H, D or T) by means of isotope exchange reactions occurring on catalyst surface. The use of permselective Pd-based membrane allows withdrawal of reactions products all along the reactor, and thus limits reverse reaction rate to the benefit of the direct one (shift effect). The reactions kinetics, which are still little known or unknown, are generally assumed to be largely greater than the permeation ones so that thermodynamic equilibriums of isotope exchange reactions are generally assumed. This paper proposes a new phenomenological 2D model to represent catalytic membrane reactor behavior with the determination of gas effluents compositions. A good agreement was obtained between the simulation results and experimental measurements performed on a dedicated facility. Furthermore, the gas composition estimation permits to interpret unexpected behavior of the catalytic membrane reactor. In the next future, further sensitivity analysis will be performed to determine the limits of the model and a kinetics study will be conducted to assess the thermodynamic equilibrium of reactions.

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Section: Modeling Assessmentmentioning

confidence: 99%