Design and Operational Experience with a Pilot-Scale CECE Detritiation Process

Miller, J.M.; Graham, William R.C.; Celovsky, S. L.; Tremblay, J.R.R.; Everatt, A. E.

doi:10.13182/fst02-a22749

Cited by 40 publications

(11 citation statements)

References 5 publications

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“…One of the most practical methods is CECE (combined electrolysis catalytic exchange) method [9][10][11][12][13]. This method combines electrolysis with chemical exchange reaction.…”

Section: Introductionmentioning

confidence: 99%

Study of Deuterium Isotope Separation by PEFC

Shibuya

Matsushima

Ueda

2016

J. Electrochem. Soc.

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Hydrogen evolution and oxidation reactions were studied on a polycrystalline platinum electrode in 0.05 M D 2 SO 4 solution at 298 K by using a rotating disk electrode, focusing on the kinetic isotope effect on reactivity. The polarization measurements in the evolution reaction regime, on the one hand, revealed two Tafel regions: at low overpotentials close to the equilibrium potential, the Tafel slope was 0.039 V dec -1 , suggesting a Volmer-Tafel mechanism; and at potentials around 0.05 V or lower, a slope of 0.168 V dec -1 indicated that a transition to a Heyrovsky-Tafel mechanism occurred.In the oxidation reaction regime, on the other hand, a single Tafel slope of 0.055 V dec -1 was observed at potentials of 0.08 V or lower. Comparing between the deuterium and protium data for the kinetic factors supported the presence of an isotope effect, whereby the deuterium was more easily dissociated on the platinum electrode. The present kinetic result supported the deuterium separation of polymer electrolyte fuel cell (PEFC) in which the mixture gases of H 2 and D 2 were purged. The deuterium separation factor increased with increasing in the hydrogen utilization. This suggests a new isotope separation technique and also provides useful data for fuel cells.

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“…One of the most practical methods is CECE (combined electrolysis catalytic exchange) method [9][10][11][12][13]. This method combines electrolysis with chemical exchange reaction.…”

Section: Introductionmentioning

confidence: 99%

Study of Deuterium Isotope Separation by PEFC

Shibuya

Matsushima

Ueda

2016

J. Electrochem. Soc.

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“…From the literature and Table 2, reveals that only in three countries (Canada, Russia, Romania) have taken application of mixed catalytic packing in the LPCE process and achieved experimental pilot plant status [6,12,18] and only in Korea (at Wolsong Tritium Removal Facility) [17] was applied at an industrial level. The complete characteristics and separation performances for applied mixed catalytic packing are not entirely described in the literature and therefore it is difficult to make a complete scientific correlation between these properties and the decision to use them in industrial or pilot plant tritium removal facilities.…”

Section: Current Status Of Mixed Catalytic Packing Used In Lpce Processmentioning

confidence: 99%

“…Only Wolsong Tritium Removal Facility [17] reached industrial status (in operation since 2007) while other similar facilities still have the status of experimental pilot plants [6,18].…”

Section: Introductionmentioning

confidence: 99%

An assessment on hydrogen isotopes separation by liquid phase catalytic exchange process

Ionitã

Bucur

Ștefănescu

2015

J Radioanal Nucl Chem

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Based upon the authors' long experience and upon a literature review, this paper presents an assessment regarding up-to-date R&D activities related to development and application of liquid phase catalytic exchange (LPCE) technology for tritium separation from tritiated water, produced in fission and fusion nuclear reactors. The assessment is focused on key elements of the LPCE process, mixed catalytic packing and as a result of the assessment, few recommendations for selecting the most suitable mixed catalytic packing are given. A new improved mixed catalytic packing (COMPACK C-P 001) was manufactured and proposed to be used in the future Tritium Removal Facility from Cernavoda CANDU NPP (Romania).

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“…The LPCE technology is the basis for the novel processes for heavy water production}namely the combined industrial reforming and catalytic exchange (CIRCE)}and also for removal of tritium ( 3 H) and protium ( 1 H) isotopes from the heavy water by combined electrolysis and catalytic exchange (CECE). The effectiveness of the proprietary wet-proofed catalysts has been demonstrated in prototype scale demonstrations of the CIRCE at Hamilton, Ontario (Spagnolo et al, 2002) and of the CECE at Chalk River, Ontario (Graham et al, 2001;Miller et al, 2002). The wet-proofed catalysts used for LPCE technology are very similar to the catalysts used in the PEM fuel cells.…”

Section: Pem Fuel Cell Electrode Catalyst Developmentmentioning

confidence: 99%

Leveraging nuclear research to support hydrogen economy

Sadhankar

2007

Int. J. Energy Res.

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SUMMARYAtomic Energy of Canada Limited (AECL), a leading integrated nuclear services company and developer of CANDU 1 reactors, is proactively leveraging its nuclear technology base to support the emerging hydrogen economy. In particular, the heavy water technologies and hydrogen safety expertise developed as part of the CANDU 1 technology development are being exploited to advance the hydrogen economy. The catalysts developed for hydrogen isotopes separation, for production and processing of heavy water, are equally relevant for the proton exchange membrane type fuel cells. Similarly, the catalytic devices developed for hydrogen mitigation in the nuclear reactors could be useful for safety applications for indoor hydrogen facilities. The new-generation, cost-effective heavy water processes developed by AECL are synergistic with hydrogen production by conventional means}steam-methane reforming and water electrolysis. Consequently, AECL's knowledge base has led to innovative ideas for 'greener' hydrogen production. Recently, AECL is engaged in international collaborations to develop novel technologies for hydrogen production by 'water-splitting'}thermochemical cycles integrated with high-temperature nuclear reactors that are under development as Generation IV systems.

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Design and Operational Experience with a Pilot-Scale CECE Detritiation Process

Cited by 40 publications

References 5 publications

Study of Deuterium Isotope Separation by PEFC

Study of Deuterium Isotope Separation by PEFC

An assessment on hydrogen isotopes separation by liquid phase catalytic exchange process

Leveraging nuclear research to support hydrogen economy

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