Gas separation by a Pd-plated alumina membrane for a small-scale emergency atmospheric detritiation system

小型应急大气除氚系统的镀钯氧化铝膜气体分离

• 批准号: 07808056
• 负责人: FUKADA Satoshi
• 金额: $ 1.34万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07808056/
• 关键词: Tritium; Permeation; Emergency detritiation system; Palladium; Hydrogen; Gas separation membrane; Desublimation; 緊急浄化システム

I conducted an experiment of the hydrogen and water vapor separation by a Pd-plated alumina membrane for a small-scale emergency atmospheric detritiation system (ADS) and carried out numerical simulations of an integrated ADS.The following results were obtained.(1) Water vapor and hydrogen separation characteristics were numerically simulated for the case of an integrated ADS partially replaced by the gas separation membrane. The counter-current flow was found to be the most promising among the cross flow, counter-current flow, co-current flow and complete mixing flow from a viewpoint of the gas separation efficiency of ADS.Water vapor preferentially permeated near the inlet of the gas separation membrane for the case of the three-component system of water vapor, tritium and nitrogen. The best cut condition was determined.(2) The water vapor and hydrogen permeabilities of a cellulose-acetate membrane and a polyimido membrane agreed with values reported in the past elsewhere. This results shows a good performance of the experimental apparatus built here.(3) Electroless Pd plating on Zr_2Fe particles was conducted for the investigation of the hydrogen permeation performance of a Pd film. The Pd plating was stable even in heating up to 800ﾟC.Hydrogen effectively permeated through the Pd film at around room temperature in oxygen free atmospheres, while hydrogen gas changed to water vapor on Pd film in atmospheres including oxygen.(4) Mist formation occurred in gas streams at the critical supersaturation condition when water vapor permeating through the gas separation membrane of ADS was cooled for desublimation from the streams.In order to establishe a small-scale emergency atmospheric detritiation system, the gas separation membrane, the electroless Pd plating technique and the vapor desublimation system was integrally investigated and each system component was proved to perform expected characteristics.

本人在小型应急大气净化系统（ADS）中进行了镀Pd氧化铝膜分离氢气和水汽的实验，并对一体化ADS进行了数值模拟，得到了以下结果。(1)对气体分离膜部分替代一体化ADS的水蒸汽和氢气分离特性进行了数值模拟。从ADS的气体分离效率的角度来看，逆流流动被认为是最有前途的交叉流，逆流流动，并流流动和完全混合流。对于水蒸气，氚和氮气的三组分系统的情况下，水蒸气优先渗透的气体分离膜的入口附近。确定了最佳切割条件。(2)醋酸纤维素膜和聚酰亚胺膜的水蒸气和氢气渗透性与过去其他地方报道的值一致。实验结果表明，该实验装置具有良好的性能。(3)采用化学镀方法在Zr_2Fe颗粒表面镀Pd，研究了Pd膜的透氢性能。Pd镀层即使在加热至800 ° C时也是稳定的。在无氧气氛中，氢气在室温左右有效地渗透通过Pd膜，而在包括氧气的气氛中，氢气在Pd膜上变成水蒸气。(4)在临界过饱和条件下，通过ADS气体分离膜的水蒸气在冷却凝华过程中会形成雾状物质，为了建立小型应急常压降温系统，对气体分离膜进行了研究，对化学镀钯工艺和气相凝华系统进行了整体研究，并验证了系统各组成部分的性能特色

项目成果

Satoshi Fukada et al.: "Analysis of multi-component permeation through gas separation membrane and its applications to atmosphere detritiation system" Fusion Technology. (in printing). (1997)

Satoshi Fukada等：“气体分离膜多组分渗透分析及其在大气除氚系统中的应用”融合技术。

Satoshi Fukada et al.: "Frost formation under different gaseous atmosphere" Journal ov Chemical Engineering of Japan. Vol.28. 732-737 (1995)

Satoshi Fukada 等：“不同气体气氛下的霜形成”日本化学工程杂志。

Satoshi Fukada et al.: "Analysis of multi-component permeation through gas separation membrane and is applications to atmosphere detritiation system" Fusion Technology. (1997)

Satoshi Fukada等人：“气体分离膜多组分渗透分析及其在大气除氚系统中的应用”融合技术。

Satoshi Fukada: "Recovery of low-concentration hydrogen from different gas streams with Zr_2Fe particle beds" Fusion Engineering and Design. (1997)

Satoshi Fukada：“利用 Zr_2Fe 颗粒床从不同气流中回收低浓度氢气”聚变工程与设计。

Satoshi Fukada et al.: "Recovery of low-concentration hydrogen from different gas streams with Zr_2Fe particle beds" Fusion Engineering and Design. (in printing). (1997)

Satoshi Fukada 等人：“利用 Zr_2Fe 颗粒床从不同气流中回收低浓度氢气”聚变工程与设计。