The influence of non-steady state operation of a PEM electrolyzer on hydrogen isotope separation in a CECE process

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Fusion Engineering and Design Pub Date : 2025-04-29 DOI:10.1016/j.fusengdes.2025.115127

O. Balteanu, A. Bornea, I. Ștefan, I. Făurescu, G. Ana, C. Bucur, M. Zamfirache

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Abstract

The electrolyzer is one of the main components of the Combined Electrolysis and Catalytic Exchange (CECE) process used to provide isotopic enrichment of hydrogen. The CECE process demands that the electrolyzer run under constant operating parameters (mainly the flowrate and water hold-up). The influence of the non-steady state regime for an electrolyzer equipped with a proton exchange membrane (PEM) stack cell, has been investigated, considering variations of the water hold-up, induced by the water management in the cathode and anode circuits. Based on a mathematical model written for a constant hold-up, a new mathematical model was developed to simulate the tritium enrichment, considering different variation of the hold-up between two limits determined from experimental data. Tests with tritiated water were carried out to evaluate the influence of the electrolyzer’s water hold-up variation on the isotopic separation process and to verify the mathematical model.

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质子交换膜电解槽非稳态运行对CECE过程中氢同位素分离的影响

电解槽是联合电解和催化交换（CECE）过程的主要组成部分之一，用于提供氢的同位素富集。CECE工艺要求电解槽在恒定的运行参数（主要是流量和持水量）下运行。考虑到阴极和阳极电路中水管理引起的持水量变化，研究了配备质子交换膜（PEM）堆叠电池的电解槽的非稳态状态的影响。在恒持率数学模型的基础上，考虑了实验数据确定的两个极限之间持率的不同变化，建立了一个新的模拟氚富集的数学模型。用氚化水进行了试验，评价了电解槽持水量变化对同位素分离过程的影响，并对数学模型进行了验证。

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来源期刊

Fusion Engineering and Design 工程技术-核科学技术

CiteScore

3.50

自引率

23.50%

发文量

275

审稿时长

3.8 months

期刊介绍： The journal accepts papers about experiments (both plasma and technology), theory, models, methods, and designs in areas relating to technology, engineering, and applied science aspects of magnetic and inertial fusion energy. Specific areas of interest include: MFE and IFE design studies for experiments and reactors; fusion nuclear technologies and materials, including blankets and shields; analysis of reactor plasmas; plasma heating, fuelling, and vacuum systems; drivers, targets, and special technologies for IFE, controls and diagnostics; fuel cycle analysis and tritium reprocessing and handling; operations and remote maintenance of reactors; safety, decommissioning, and waste management; economic and environmental analysis of components and systems.