Study of Deuterium Isotope Separation By Anion Exchange Membranes Water Electrolysis

聚合物电解质膜电解 电解 电解水 化学 电解质 阳极 高压电解 无机化学 分析化学(期刊) 制氢 质子交换膜燃料电池 同位素分离 离子交换 离子 色谱法 同位素 电极 核物理学 物理化学 生物化学 物理 有机化学
作者
Hiroji Sato,Hisayoshi Matsushima,Mikito Ueda,Hiroshi Ito
出处
期刊:Meeting abstracts 卷期号:MA2021-01 (51): 1983-1983
标识
DOI:10.1149/ma2021-01511983mtgabs
摘要

1. Introduction Hydrogen energy is one of solutions for decarbonized society. Water electrolysis is promising as hydrogen production. Currently, water electrolysis with a solid polymer electrolyte membrane has been developed. The electrolysis using a cation-exchange membrane (PEM) has been widely used, while one using an anion-exchange membrane (AEM) is studied as a next-generation method with nonprecious catalysts. Hydrogen isotope separation is applied as a new application of water electrolysis. The nuclear fusion reactor ITER, which uses deuterium and tritium as fuel, will be operated around 2035 when the isotope separation/enrichment technology will be required. We have studied deuterium (D) separation by both PEM- and AEM-type. The separation ability of PEM electrolysis remarkably depended on the ratio of water supplied to the current density (stoichiometric ratio: λ) [1]. Interestingly, AEM one was better than PEM [2]. In this study, AEM electrolysis was investigated at various λ in order to improve the separation performance. 2. Experimental The electrolyte was 0.1 M KOH with 10 at% D. The D concentration was adjusted by D 2 O. The electrolyte was supplied from the lower part of only the anode side. The ready-made AEM (A201, Tokuyama) was employed as electrolyte. Pt catalyst was used as the anode catalyst and CuCoO x was used as the cathode one. The electrolysis was conducted at constant current densities or water feed at room temperature. The hydrogen gas was analyzed by a quadrupole mass spectrometer to determine the mass number ( m = 2 (H 2 ), 3 (HD), 4 (D 2 )), while the solution discharged from the anode was investigated by FTIR using the attenuated total reflection (ATR) method with a diamond prism. 3. Results and discussion Figure 1 shows the D content in hydrogen gas evolving from the cathode. In the figure, α gas indicates the separation factor, which is the ratio of protium (H) atomic concentration of the gas to the supplied water. The value of α gas decreased with decreasing λ. The present result suggests H dilution in the gas as well as PEM-type. It should be noted that AEM one could be electrolyzed and keep draining the electrolyte from the anode even at λ ≤ 4, while PEM-type discharged the almost all volume of the electrolyte from the cathode side [1]. This might be explained by the mass transportation by the diffusion and electroosmosis whose flows direction depend on the membrane type. In our presentation, the other results such as D concentration in electrolyte and pH variation depending on λ will be introduced. We will discuss the D separation mechanism by AEM electrolysis from the viewpoints of the water distribution and the mass transportation in the membrane. References K. Harada et al., Int. J. Hydrog. Energy , 45 (2020) 31389-31395. .H. Matsushima et al., Int. J. Electrochemical Society , 166 (10) F566-F568 (2019) Figure 1

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
七安完成签到,获得积分10
1秒前
yinmuchen完成签到,获得积分10
1秒前
王蔚染完成签到,获得积分10
2秒前
超级雨完成签到,获得积分10
2秒前
依依完成签到,获得积分10
3秒前
英姑应助lzhgoashore采纳,获得10
4秒前
zsy完成签到 ,获得积分10
5秒前
苹果花完成签到,获得积分10
5秒前
6秒前
7秒前
从别后忆相逢完成签到 ,获得积分10
7秒前
9秒前
10秒前
10秒前
chihirovvvv完成签到,获得积分10
10秒前
内向映天完成签到 ,获得积分10
11秒前
一多完成签到 ,获得积分10
11秒前
小葫芦完成签到 ,获得积分10
11秒前
Cheung2121发布了新的文献求助10
12秒前
zzz发布了新的文献求助10
12秒前
小麦完成签到,获得积分10
14秒前
风中的非笑完成签到,获得积分10
14秒前
SICHEN发布了新的文献求助10
15秒前
大模型应助程公子采纳,获得10
16秒前
zhao完成签到,获得积分10
16秒前
旺仔同学发布了新的文献求助10
17秒前
RX信完成签到,获得积分10
18秒前
mumufan完成签到,获得积分10
18秒前
无花果应助晴云采纳,获得10
18秒前
啊标完成签到,获得积分10
18秒前
耕牛热完成签到,获得积分10
18秒前
bsn完成签到 ,获得积分10
19秒前
Akim应助乌拉拉采纳,获得10
20秒前
夏傥完成签到,获得积分10
21秒前
21秒前
彭博完成签到 ,获得积分10
22秒前
SICHEN完成签到,获得积分10
22秒前
韩_完成签到,获得积分10
23秒前
nnnnn完成签到 ,获得积分10
24秒前
鉨汏闫完成签到,获得积分10
24秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
Research on Disturbance Rejection Control Algorithm for Aerial Operation Robots 500
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038426
求助须知:如何正确求助?哪些是违规求助? 3576119
关于积分的说明 11374556
捐赠科研通 3305834
什么是DOI,文献DOI怎么找? 1819339
邀请新用户注册赠送积分活动 892678
科研通“疑难数据库(出版商)”最低求助积分说明 815029