Joule self-heating enabled oxygen transport and coupled methane reactions in a La0.6Sr0.4Co0.2Fe0.8O3-δ hollow fiber membrane reactor

IF 4.4 3区工程技术 Q2 ENGINEERING, CHEMICAL

AIChE Journal Pub Date : 2026-10-15 Epub Date: 2026-08-17 DOI:10.1002/aic.70612

Gang Wang, Hamed Abdolahimansoorkhani, Xingjian Xue

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引用次数: 0

Abstract

Mixed-conducting ceramic hollow fiber membranes are a versatile platform for oxygen separation, value-added chemical production, and oxy-combustion. Because oxygen permeation is thermally activated, these systems typically rely on bulky, energy-intensive furnaces that suffer from low efficiency and large thermal inertia. Joule (resistive) heating, achieved by directly applying voltage or current to the fibers, offers a compact and efficient alternative. Yet, this self-heating strategy has not been explored in methane-fueled membrane reactors. Here, La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ (LSCF) hollow fiber membranes are fabricated via a template-assisted rotating method and used as a model system. Their oxygen permeation under Joule heating is evaluated, followed by stability testing over ~75 h and 20 thermal cycles. A methane-fueled membrane reactor is then examined, focusing on the influence of applied voltage (temperature) and methane concentration on conversion and selectivity. Long-term reactor stability (~75 h) and the mechanisms governing oxygen transport and performance are also analyzed.

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在La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3‐δ中空纤维膜反应器中，焦耳自热实现了氧传输和耦合甲烷反应

混合导电陶瓷中空纤维膜是一种多功能平台，用于氧分离，增值化工生产和氧燃烧。由于氧气渗透是热激活的，这些系统通常依赖于体积庞大、能量密集型的炉子，这些炉子效率低，热惯性大。焦耳（电阻）加热，通过直接对光纤施加电压或电流来实现，提供了一种紧凑而高效的替代方案。然而，这种自加热策略尚未在甲烷燃料膜反应器中进行探索。本文采用模板辅助旋转法制备了La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3‐δ (LSCF)中空纤维膜，并将其作为模型体系。在焦耳加热下评估了它们的氧渗透性，然后进行了75 h和20个热循环的稳定性测试。然后研究了甲烷燃料膜反应器，重点研究了施加电压（温度）和甲烷浓度对转化率和选择性的影响。还分析了反应器的长期稳定性（~75 h）以及控制氧传输和性能的机制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.