Development of Pt/ASDBC catalyst for room temperature recombiner of atmosphere detritiation system

Iwai, Yasunori; Sato, Katsumi; Yamanishi, Toshihiko

doi:10.1016/j.fusengdes.2011.04.028

Cited by 22 publications

(11 citation statements)

References 6 publications

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“…Deactivation was observed to depend on the catalyst supports. It did not occur when a hydrophobic polymer was used as support but it was pronounced on alumina (␣-Al 2 O 3 ) [58] or cordierite (Al-Cr-Fe) as the supports [59]. We reiterate, however, the type of active metal seems to be a more prominent factor in the water-induced deactivation than the hydrophilic/hydrophobic properties of support.…”

Section: Microcalorimetric Experimentsmentioning

confidence: 72%

Humidity induced deactivation of Al2O3 and SiO2 supported Pd, Pt, Pd-Pt catalysts in H2+O2 recombination reaction: The catalytic, microcalorimetric and DFT studies

Lalik

Kosydar

Tokarz-Sobieraj

et al. 2015

Applied Catalysis A: General

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Section: Microcalorimetric Experimentsmentioning

confidence: 72%

Humidity induced deactivation of Al2O3 and SiO2 supported Pd, Pt, Pd-Pt catalysts in H2+O2 recombination reaction: The catalytic, microcalorimetric and DFT studies

Lalik

Kosydar

Tokarz-Sobieraj

et al. 2015

Applied Catalysis A: General

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“…The inner diameter and length of the RTR/LTR were 27.5 mm and 152.0 mm, respectively. The volume of the catalysts packed in the RTR/LTR was selected to be 40 cm 3 . The RTR/LTR was thermally insulated.…”

Section: Tritium Test On the Influence Of Produced Gases From Burned mentioning

confidence: 99%

“…The activity of HTO trapped in the HTO Trap 2 was determined with a liquid scintillation counter. The numerical procedures for evaluating the overall reaction rate constant were similar as previously described elsewhere [2,3].…”

Section: Tritium Test On the Influence Of Produced Gases From Burned mentioning

confidence: 99%

“…A combined catalytic reactor and water absorber system has been applied to control the tritium release into the environment as low as reasonably achievable [1]. The oxidation performance of tritium both with hydrophobic Pt-catalysts for a room temperature reactor and with hydrophilic Pt-alumina catalysts for a low temperature reactor operated near 423 K has been systematically demonstrated [2,3]. The overall reaction rate constant for tritium oxidation with those catalysts was determined as a function of space velocity, hydrogen concentration in carrier, catalyst temperature, and water vapor concentration in carrier.…”

Section: Introductionmentioning

confidence: 99%

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Change in activity of catalysts for the oxidation of tritium during a fire event

Iwai

Sato

Yamanishi

2012

Fusion Engineering and Design

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“…As to the effect of water vapor on catalytic efficiency, it is well known that water vapor adsorbed on the surface of catalyst obstructs the transfer of tritium to the active sites of catalyst [5,6]. In order to overcome the negative effect of water vapor on catalytic efficiency, hydrophobic catalyst has successfully been developed [7,8]. As for the effect of hydrocarbons, the difference between the DS for the existing tritium handling facilities and that for the DEMO nuclear fusion power plant is the concentration of hydrocarbons to be considered.…”

Section: Introductionmentioning

confidence: 99%

Effect of hydrocarbons on the efficiency of catalytic reactor of detritiation system in an event of fire

Edao

Sato

Iwai

et al. 2016

Journal of Nuclear Science and Technology

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Detritiation system of a nuclear fusion plant is mandatory to be designed and qualified taking carefully into consideration all the possible extraordinary situations in addition to that in a normal condition. We focused on the change in the efficiency of tritium oxidation of a catalytic reactor in an event of fire where the air accompanied with hydrocarbons, water vapor, and tritium is fed into a catalytic reactor at the same time. Our test results on the effect of these gases on the efficiency of tritium oxidation of the catalytic reactor indicated; (1) tritiated hydrocarbon produces significantly by reaction between tritium and hydrocarbons in a catalytic reactor; (2) there is little possibility of degradation in the detritiation performance because the tritiated hydrocarbons produced in the catalyst reactor are combusted; (3) there is no possibility of uncontrollable rise in the temperature of the catalytic reactor by heat of reactions; and (4) saturated water vapor could temporarily poison the catalyst and degrades the detritiation performance. Our investigation indicated a saturated water vapor condition without hydrocarbons would be the dominant scenario to determine the amount of catalyst for the design of catalytic reactor of the detritiation system.

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Development of Pt/ASDBC catalyst for room temperature recombiner of atmosphere detritiation system

Cited by 22 publications

References 6 publications

Humidity induced deactivation of Al2O3 and SiO2 supported Pd, Pt, Pd-Pt catalysts in H2+O2 recombination reaction: The catalytic, microcalorimetric and DFT studies

Humidity induced deactivation of Al2O3 and SiO2 supported Pd, Pt, Pd-Pt catalysts in H2+O2 recombination reaction: The catalytic, microcalorimetric and DFT studies

Change in activity of catalysts for the oxidation of tritium during a fire event

Effect of hydrocarbons on the efficiency of catalytic reactor of detritiation system in an event of fire

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