Fifteen Years of Operation of CECE Experimental Industrial Plant in PNPI

Alekseev, I. A.; Bondarenko, S. D.; Fedorchenko, O. A.; Vasyanina, Т. V.; Konoplev, K. A.; Arkhipov, E. A.; Uborsky, V. V.

doi:10.13182/fst60-1117

Cited by 18 publications

(4 citation statements)

References 7 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%

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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%

“…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. Hydrogen generated in electrolysis is passed into a column mixed with kogel catalyst and Dixon rings.…”

mentioning

confidence: 99%

Study of Deuterium Isotope Separation by PEFC

Shibuya

Matsushima

Ueda

2016

J. Electrochem. Soc.

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“…This technology is used at the Canada Deuterium Uranium (CANDU) nuclear power reactor plant for heavy water production in combination with electrolysis, which is called the Combined Electrolytic Catalytic Exchange-Heavy Water Process (CECE-HWP) [21]. This technology is also being used in Petersburg Nuclear Physics Institute at the industrial plant scale for heavy water detritiation [44]. Figure 3 shows the general process flow diagram for hydrogen isotope separation using LPCE technology.…”

Section: Hydrogen Isotope Separation Via Liquid Phase Catalytic Exchangementioning

confidence: 99%

A Mini Review on Liquid Phase Catalytic Exchange for Hydrogen Isotope Separation: Current Status and Future Potential

Mhd Yusof,

Lock,

Abdul Talib

et al. 2024

Sustainability

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Liquid phase catalytic exchange (LPCE) appears a highly promising technology for separating hydrogen isotopes due to being less energy-intensive and having a high separation factor. This paper provides an overview of the current development of the hydrophobic catalysts used in the LPCE process, including the LPCE fundamentals, factors influencing its effectiveness, and proposals for future research areas. This paper specifically reviews the active metal catalysts, catalyst supports, operating temperatures, and molar feed ratio(gas-to-liquid,G/L). The addition of a second metal such as Ir, Fe, Ru, Ni, or Cr and modified catalyst supports showed enhancement of LPCE performance. Additionally, the validated optimized temperature of 60–80 °C and G/L of 1.5–2.5 provide an important basis for designing LPCE systems to improve separation efficiency. This paper concludes by highlighting potential research areas and challenges for future advancements in the sustainability of LPCE for hydrogen isotope separation, which include the optimization, scalability, techno-economic analysis, and life-cycle analysis of modified catalyst materials.

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“…Upgrading of recycled water from a nuclear power station usually contains low abundances of deuterium (D) and radioactive tritium (T), which are needed to separate these hydrogen isotopes and decrease their toxicity. − In general, separation technologies include physical processes such as distillation and thermal diffusion and chemical reactions like catalytic exchange. As one of the catalytic exchange technologies, liquid-phase catalytic exchange (LPCE) has attracted much attention because of mild operating conditions, low energy consumption, and high separation efficiency. − …”

Section: Introductionmentioning

confidence: 99%

Liquid-Phase Catalytic Exchange of Hydrogen Isotopes over Platinum on Dual-Modified Graphene

Feng

Jiang

et al. 2021

ACS Appl. Mater. Interfaces

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Although liquid-phase catalytic exchange is an environmentally friendly treatment of hydrogen isotopes in recycled water of a nuclear power station, the successive development of hydrophobic catalysts is still needed to meet much higher catalytic exchange efficiency and stability. Herein, a dual-modified graphene with Pt loading was designed by amination and silanization to anchor Pt nanoparticles uniformly, as well as obtain higher hydrophobicity. After coating the reactor walls with poly(dimethylsiloxane), the catalytic exchange efficiency of the dual-modified graphene with lower Pt loadings (Pt/200-S-NH2-GR) improved up to 91% at 80 °C, which was higher than 80% of only animated graphene (Pt/NH2-GR) at the same condition. Furthermore, the Pt/200-S-NH2-GR maintained high stability for at least 10 h in the temperature range of 40–80 °C, while the Pt/NH2-GR decreased 17% of catalytic exchange efficiency at 80 °C within 10 h. Using the dual-modified strategy for graphene support, high efficiency and stability was achieved for heavy water dedeuteration.

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Fifteen Years of Operation of CECE Experimental Industrial Plant in PNPI

Cited by 18 publications

References 7 publications

Study of Deuterium Isotope Separation by PEFC

Study of Deuterium Isotope Separation by PEFC

A Mini Review on Liquid Phase Catalytic Exchange for Hydrogen Isotope Separation: Current Status and Future Potential

Liquid-Phase Catalytic Exchange of Hydrogen Isotopes over Platinum on Dual-Modified Graphene

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