Journal of Membrane Science Letters最新文献

英文中文

Electrochemically-driven solid oxide tubular membrane reactor for efficient separation of oxygen and argon 用于高效分离氧和氩的电化学驱动固体氧化物管状膜反应器

IF 4.9 Q1 ENGINEERING, CHEMICAL

Journal of Membrane Science Letters

Pub Date : 2025-01-30 DOI: 10.1016/j.memlet.2025.100092

Yuanhui Tang , Yutao Hu , Sisi Wen , Song Lei , Yakai Lin , Li Ding , Haihui Wang

The high purity of Ar is crucial for industrial applications such as steel production, welding, and laboratory use, while the similar physical properties of O₂ and Ar make their efficient separation challenging. Existing technologies, such as cryogenic distillation and pressure swing adsorption, are well-established and widely utilized but are hindered by high energy consumption, operational complexity, or limited efficiency. Inspired by the principle that O₂ can permeate through the electrolyte as oxygen ions (O^2-) in a solid oxide electrolysis cell, for the first time, this study designed and developed an electrochemically-driven tubular inorganic membrane reactor to separate O₂/Ar mixtures, achieving high-purity Ar (≥99.99 %). The tubular membrane reactor featured an anode/electrolyte/cathode sandwich structure, offering a compact design particularly suited for gas separation. The reactor employs Ce_0.1Gd_0.9O_2-x (GDC) as the electrolyte, while GDC and Ba_0.9Co_0.7Fe_0.3Nb_0.1O_3-x are used as the electrode materials. The resulting membrane reactor was compact, defect-free, and capable of producing Ar with a purity of 99.99 %. Additionally, under a constant total current of 0.75 A and an operating temperature of 800 °C, the membrane reactor demonstrated stable performance for over 130 hours, maintaining a Faradaic efficiency exceeding 95 %. This study anticipates that the membrane reactor can serve as an effective and practical solution for separating O₂/Ar mixtures, particularly at low O₂ partial pressures.

Ar的高纯度对于钢铁生产、焊接和实验室使用等工业应用至关重要，而O2和Ar的相似物理性质使它们的有效分离具有挑战性。现有的技术，如低温蒸馏和变压吸附，已经建立并广泛应用，但受到高能耗、操作复杂或效率有限的阻碍。本研究利用固体氧化物电解池中O2以氧离子（O2-）形式渗透电解质的原理，首次设计开发了电化学驱动的管状无机膜反应器，用于分离O2/Ar混合物，获得了高纯度Ar（≥99.99%）。管状膜反应器采用阳极/电解质/阴极夹层结构，设计紧凑，特别适合气体分离。反应器采用Ce0.1Gd0.9O2-x （GDC）作为电解液，GDC和ba0.9 co0.7 fe0.3 nb0.1 10o2 -x作为电极材料。所得到的膜反应器结构紧凑，无缺陷，能够生产纯度为99.99%的Ar。此外，在恒定的0.75 a总电流和800℃的工作温度下，膜反应器表现出超过130小时的稳定性能，法拉第效率保持在95%以上。本研究预计膜反应器可以作为分离O2/Ar混合物的有效和实用的解决方案，特别是在低O2分压下。

{"title":"Electrochemically-driven solid oxide tubular membrane reactor for efficient separation of oxygen and argon","authors":"Yuanhui Tang , Yutao Hu , Sisi Wen , Song Lei , Yakai Lin , Li Ding , Haihui Wang","doi":"10.1016/j.memlet.2025.100092","DOIUrl":"10.1016/j.memlet.2025.100092","url":null,"abstract":"<div><div>The high purity of Ar is crucial for industrial applications such as steel production, welding, and laboratory use, while the similar physical properties of O2 and Ar make their efficient separation challenging. Existing technologies, such as cryogenic distillation and pressure swing adsorption, are well-established and widely utilized but are hindered by high energy consumption, operational complexity, or limited efficiency. Inspired by the principle that O2 can permeate through the electrolyte as oxygen ions (O2-) in a solid oxide electrolysis cell, for the first time, this study designed and developed an electrochemically-driven tubular inorganic membrane reactor to separate O2/Ar mixtures, achieving high-purity Ar (≥99.99 %). The tubular membrane reactor featured an anode/electrolyte/cathode sandwich structure, offering a compact design particularly suited for gas separation. The reactor employs Ce0.1Gd0.9O2-x (GDC) as the electrolyte, while GDC and Ba0.9Co0.7Fe0.3Nb0.1O3-x are used as the electrode materials. The resulting membrane reactor was compact, defect-free, and capable of producing Ar with a purity of 99.99 %. Additionally, under a constant total current of 0.75 A and an operating temperature of 800 °C, the membrane reactor demonstrated stable performance for over 130 hours, maintaining a Faradaic efficiency exceeding 95 %. This study anticipates that the membrane reactor can serve as an effective and practical solution for separating O2/Ar mixtures, particularly at low O2 partial pressures.</div></div>","PeriodicalId":100805,"journal":{"name":"Journal of Membrane Science Letters","volume":"5 1","pages":"Article 100092"},"PeriodicalIF":4.9,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143292745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}