Optimization of oxycombustion capillary membrane reactors with protective and catalytic layers

IF 8.1 1区工程技术 Q1 ENGINEERING, CHEMICAL Separation and Purification Technology Pub Date : 2025-03-18 DOI:10.1016/j.seppur.2025.132595

Alvaro Represa, Marwan Laqdiem, Julio Garcia-Fayos, Laura Almar, Jose M. Serra

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Abstract

A key strategy for reducing greenhouse gas emissions is advancing carbon capture and storage (CCS) technologies, with oxycombustion playing a vital role in industrial decarbonization. Oxygen transport membranes (OTMs) enable flexible oxygen production and integration with catalytic membrane reactors (CMRs) to enhance process efficiency. However, OTMs with high permeation are unstable in CO₂ and CH₄ environments. This study investigates methane oxidation over Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3-δ (BSCF) capillary membranes with the effect of protective catalytic layers of BSCF, Ce_0.8Tb_0.2O_2-δ and Co₂MnO₄ / Ce_0.8Tb_0.2O_2-δ. The developed catalytic membrane reactors, formed by BSCF membranes with these catalytic protective layers, achieved complete CH₄ conversion and total selectivity for oxycombustion under the selected conditions while maintaining their performance and structural stability under CH₄ and CO₂ exposure.

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减少温室气体排放的一项关键战略是推进碳捕集与封存（CCS）技术，而氧气燃烧在工业脱碳中发挥着至关重要的作用。氧传输膜（OTMs）可以灵活地生产氧气，并与催化膜反应器（CMRs）集成以提高工艺效率。然而，高渗透率的 OTM 在 CO2 和 CH4 环境中并不稳定。本研究探讨了在 BSCF、Ce0.8Tb0.2O2-δ 和 Co2MnO4 / Ce0.8Tb0.2O2-δ 的保护催化层作用下，Ba0.5Sr0.5Co0.8Fe0.2O3-δ（BSCF）毛细管膜上的甲烷氧化作用。所开发的催化膜反应器由带有这些催化保护层的 BSCF 膜构成，在选定的条件下实现了完全的 CH4 转化和全选择性氧化燃烧，同时在 CH4 和 CO2 暴露条件下保持了性能和结构稳定性。

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.