The influence of various sized zircaloy-4 oxidation products on hydrogen generation of the water solution by Co-60 gamma radiolysis

In this work, we have experimentally studied the effect of particle size of the oxidized zircaloy-4 on the observed yield of Hydrogen generation by Co-60 gamma radiolysis of water. The oxidation products were obtained by high-temperature oxidation of zircaloy-4 under dry air atmosphere for 2 and 4...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Yoshinobu MATSUMOTO, Tatsuya SUZUKI, Toru OGAWA, Masao INOUE, Ryuji NAGAISHI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2020
Materias:	hydrogen generation water radiolysis zircaloy-4 oxidation particle size Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/f94c83c29de04b9fa7081fbcdde04c2f
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:f94c83c29de04b9fa7081fbcdde04c2f
record_format	dspace
spelling	oai:doaj.org-article:f94c83c29de04b9fa7081fbcdde04c2f2021-11-29T05:56:31ZThe influence of various sized zircaloy-4 oxidation products on hydrogen generation of the water solution by Co-60 gamma radiolysis2187-974510.1299/mej.19-00562https://doaj.org/article/f94c83c29de04b9fa7081fbcdde04c2f2020-05-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/7/3/7_19-00562/_pdf/-char/enhttps://doaj.org/toc/2187-9745In this work, we have experimentally studied the effect of particle size of the oxidized zircaloy-4 on the observed yield of Hydrogen generation by Co-60 gamma radiolysis of water. The oxidation products were obtained by high-temperature oxidation of zircaloy-4 under dry air atmosphere for 2 and 4 hours. We crushed them into various sizes from 3 to 484 μm after the oxidation. The crushed particles of the product of 4 hours oxidation consisted of almost monoclinic zirconium oxide and the 2 hours oxidation product contained from 26 to 56% of tetragonal zirconium oxide. These particles had specific surface areas from 0.73 to 2.58 m2/g and band gaps 5.1 eV all. The oxidation products of the weight fraction of 10% and distilled water were mixed into a 4 ml glass vial to examine the Hydrogen generation by Co-60 gamma radiolysis. The experiments have presented that the observed hydrogen yield, G(H2) was increased by decreasing the median particle diameter of both the oxidation products. Especially, the G(H2) of water added the particles with 3 or 5 μm became larger than that of only distilled water. This enhancement was not caused by the bandgap of the oxidation product. Calculated G(H2) per surface area of the oxidation product, G(H2)/S was constant on all particle sizes. Furthermore, G(H2)/S of the water added the oxidation products with the median particle diameter 3 or 5 μm were larger than the commercial zirconium oxides (m-ZrO2, t-ZrO2) whose median particle diameters are 3 μm. In conclusion, Hydrogen generation of water by Co-60 gamma radiolysis was influenced by the particle size added into water. We have considered that the surface area of the oxidation product was the predominant factor of this effect because the G(H2) per specific surface area was constant regardless of particle size of the crushed oxidation products in this experiment.Yoshinobu MATSUMOTOTatsuya SUZUKIToru OGAWAMasao INOUERyuji NAGAISHIThe Japan Society of Mechanical Engineersarticlehydrogen generationwater radiolysiszircaloy-4oxidationparticle sizeMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 7, Iss 3, Pp 19-00562-19-00562 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	hydrogen generation water radiolysis zircaloy-4 oxidation particle size Mechanical engineering and machinery TJ1-1570
spellingShingle	hydrogen generation water radiolysis zircaloy-4 oxidation particle size Mechanical engineering and machinery TJ1-1570 Yoshinobu MATSUMOTO Tatsuya SUZUKI Toru OGAWA Masao INOUE Ryuji NAGAISHI The influence of various sized zircaloy-4 oxidation products on hydrogen generation of the water solution by Co-60 gamma radiolysis
description	In this work, we have experimentally studied the effect of particle size of the oxidized zircaloy-4 on the observed yield of Hydrogen generation by Co-60 gamma radiolysis of water. The oxidation products were obtained by high-temperature oxidation of zircaloy-4 under dry air atmosphere for 2 and 4 hours. We crushed them into various sizes from 3 to 484 μm after the oxidation. The crushed particles of the product of 4 hours oxidation consisted of almost monoclinic zirconium oxide and the 2 hours oxidation product contained from 26 to 56% of tetragonal zirconium oxide. These particles had specific surface areas from 0.73 to 2.58 m2/g and band gaps 5.1 eV all. The oxidation products of the weight fraction of 10% and distilled water were mixed into a 4 ml glass vial to examine the Hydrogen generation by Co-60 gamma radiolysis. The experiments have presented that the observed hydrogen yield, G(H2) was increased by decreasing the median particle diameter of both the oxidation products. Especially, the G(H2) of water added the particles with 3 or 5 μm became larger than that of only distilled water. This enhancement was not caused by the bandgap of the oxidation product. Calculated G(H2) per surface area of the oxidation product, G(H2)/S was constant on all particle sizes. Furthermore, G(H2)/S of the water added the oxidation products with the median particle diameter 3 or 5 μm were larger than the commercial zirconium oxides (m-ZrO2, t-ZrO2) whose median particle diameters are 3 μm. In conclusion, Hydrogen generation of water by Co-60 gamma radiolysis was influenced by the particle size added into water. We have considered that the surface area of the oxidation product was the predominant factor of this effect because the G(H2) per specific surface area was constant regardless of particle size of the crushed oxidation products in this experiment.
format	article
author	Yoshinobu MATSUMOTO Tatsuya SUZUKI Toru OGAWA Masao INOUE Ryuji NAGAISHI
author_facet	Yoshinobu MATSUMOTO Tatsuya SUZUKI Toru OGAWA Masao INOUE Ryuji NAGAISHI
author_sort	Yoshinobu MATSUMOTO
title	The influence of various sized zircaloy-4 oxidation products on hydrogen generation of the water solution by Co-60 gamma radiolysis
title_short	The influence of various sized zircaloy-4 oxidation products on hydrogen generation of the water solution by Co-60 gamma radiolysis
title_full	The influence of various sized zircaloy-4 oxidation products on hydrogen generation of the water solution by Co-60 gamma radiolysis
title_fullStr	The influence of various sized zircaloy-4 oxidation products on hydrogen generation of the water solution by Co-60 gamma radiolysis
title_full_unstemmed	The influence of various sized zircaloy-4 oxidation products on hydrogen generation of the water solution by Co-60 gamma radiolysis
title_sort	influence of various sized zircaloy-4 oxidation products on hydrogen generation of the water solution by co-60 gamma radiolysis
publisher	The Japan Society of Mechanical Engineers
publishDate	2020
url	https://doaj.org/article/f94c83c29de04b9fa7081fbcdde04c2f
work_keys_str_mv	AT yoshinobumatsumoto theinfluenceofvarioussizedzircaloy4oxidationproductsonhydrogengenerationofthewatersolutionbyco60gammaradiolysis AT tatsuyasuzuki theinfluenceofvarioussizedzircaloy4oxidationproductsonhydrogengenerationofthewatersolutionbyco60gammaradiolysis AT toruogawa theinfluenceofvarioussizedzircaloy4oxidationproductsonhydrogengenerationofthewatersolutionbyco60gammaradiolysis AT masaoinoue theinfluenceofvarioussizedzircaloy4oxidationproductsonhydrogengenerationofthewatersolutionbyco60gammaradiolysis AT ryujinagaishi theinfluenceofvarioussizedzircaloy4oxidationproductsonhydrogengenerationofthewatersolutionbyco60gammaradiolysis AT yoshinobumatsumoto influenceofvarioussizedzircaloy4oxidationproductsonhydrogengenerationofthewatersolutionbyco60gammaradiolysis AT tatsuyasuzuki influenceofvarioussizedzircaloy4oxidationproductsonhydrogengenerationofthewatersolutionbyco60gammaradiolysis AT toruogawa influenceofvarioussizedzircaloy4oxidationproductsonhydrogengenerationofthewatersolutionbyco60gammaradiolysis AT masaoinoue influenceofvarioussizedzircaloy4oxidationproductsonhydrogengenerationofthewatersolutionbyco60gammaradiolysis AT ryujinagaishi influenceofvarioussizedzircaloy4oxidationproductsonhydrogengenerationofthewatersolutionbyco60gammaradiolysis
_version_	1718407624201863168

The influence of various sized zircaloy-4 oxidation products on hydrogen generation of the water solution by Co-60 gamma radiolysis

Ejemplares similares