A novel deuterium separation system by the combination of water electrolysis and fuel cell

Matsushima, Hisayoshi; Kitabata, Takuya; Ito, Yasuhiko

doi:10.1016/j.energy.2004.11.013

Cited by 10 publications

(8 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, we have been proposing a new electrolytic deuterium separation system using a fuel cell. It is suggested by calculation that the new system remarkably should reduce electric energy consumption for heavy water production by reusing the hydrogen and oxygen gases at a fuel cell [23]. However, the hydrogen isotope effect of a fuel cell is not experimentally investigated very much.…”

Section: Introductionmentioning

confidence: 99%

Study of Deuterium Isotope Separation by PEFC

Shibuya

Matsushima

Ueda

2016

J. Electrochem. Soc.

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

Study of Deuterium Isotope Separation by PEFC

Shibuya

Matsushima

Ueda

2016

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…2(A) shows a schematic diagram of a D 2 O concentrator that combines a PEWE and PEFC used in the preliminary test. Because high isotope separation efficiency has been reportedly expected by a method called combined electrolysis fuel cell (CEFC), 34–37 it was investigated using the equipment in Fig. 2(A) to determine whether the method is suitable for the D 2 O recycling concentrator.…”

Section: Methodsmentioning

confidence: 99%

Heavy water recycling for producing deuterium compounds

et al. 2022

View full text Add to dashboard Cite

show abstract

“…To address these issues, we have proposed new a hydrogen separation system, named CEFC [15]. In this system, hydrogen and oxygen gases from electrolysis are used for electricity generation in a fuel cell.…”

Section: Introductionmentioning

confidence: 99%

Deuterium isotope separation by combined electrolysis fuel cell

Ogawa

Tanii

Dawson

et al. 2018

Energy

View full text Add to dashboard Cite

The framework about combined electrolysis fuel cell (CEFC) was reported previously [H. Matsushima et al., Energy, 2005; 30; 2413]. The purpose of the present study focused on measuring the separation factor and the energy reduction by assembling CEFC system. The separation of deuterium was studied with a 1-M KOH electrolyte containing 10 at% deuterium. Polarization plots of alkaline water electrolysis (AWE) revealed relationships between the catalytic activity of the hydrogen evolution reaction and the deuterium separation factor. The power loss was mainly attributed to gas bubble evolution. For polymer electrolyte fuel cells (PEFCs) with a Pt catalyst, approximately 21% of the electrical energy could be recovered by reusing hydrogen gas produced by the AWE. Furthermore, the PEFC could efficiently dilute protium in the gas phase, resulting in a high separation factor of 30.2 for the CEFC.

show abstract

A novel deuterium separation system by the combination of water electrolysis and fuel cell

Cited by 10 publications

References 9 publications

Study of Deuterium Isotope Separation by PEFC

Study of Deuterium Isotope Separation by PEFC

Heavy water recycling for producing deuterium compounds

Deuterium isotope separation by combined electrolysis fuel cell

Contact Info

Product

Resources

About