首页|Electrifying Ba0.5Sr0.5Co0.8Fe0.2O3-δ for focalized heating in oxygen transport membranes

Electrifying Ba0.5Sr0.5Co0.8Fe0.2O3-δ for focalized heating in oxygen transport membranes

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Industry decarbonization requires the development of highly efficient and flexible technologies relying on renewable energy resources,especially biomass and solar/wind electricity.In the case of pure oxygen production,oxygen transport membranes(OTMs)appear as an alternative technology for the cryogenic distillation of air,the industrially-established process of producing oxygen.Moreover,OTMs could pro-vide oxygen from different sources(air,water,CO2,etc.),and they are more flexible in adapting to current processes,producing oxygen at 700-1000 ℃.Furthermore,OTMs can be integrated into catalytic mem-brane reactors,providing new pathways for different processes.The first part of this study was focused on electrification on a traditional OTM material(Ba0.5Sr0.5Co0.8Fe0.2O3-δ),imposing different electric cur-rents/voltages along a capillary membrane.Thanks to the emerging Joule effect,the membrane-surface.temperature and the associated O2 permeation flux could be adjusted.Here,the OTM is electrically and locally heated and reaches 900 ℃ on the surface,whereas the surrounding of the membrane was maintained at 650 ℃.The O2 permeation flux reached for the electrified membranes was～3.7 NmL min-1 cm-2,corresponding to the flux obtained with an OTM non-electrified at 900 ℃.The influence of depositing a porous Ce0.8Tb0.2O2-δ catalytic/protective layer on the outer membrane surface revealed that lower surface temperatures(830 ℃)were detected at the same imposed electric power.Finally,the electrification concept was demonstrated in a catalytic membrane reactor(CMR)where the oxidative dehydrogenation of ethane(ODHE)was carried out.ODHE reaction is very sensitive to temper-ature,and here,we demonstrate an improvement of the ethylene yield by reaching moderate tempera-tures in the reaction chamber while the O2 injection into the reaction can be easily fine-tuned.

Oxygen permeationOxidative dehydrogenation of ethaneOxygen transport membranesJoule effectMixed ionic-electronic conductorsCatalytic membrane reactors

Marwan Laqdiem、Julio García-Fayos、Laura Almar、Alfonso J.Carrillo、álvaro Represa、José M.López Nieto、Sonia Escolástico、David Catalán-Martinez、Jose M.Serra

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Instituto de Tecnología Química(Universitat Politècnica de València-Consejo Superior de Investigaciones Científicas),Av.Los Naranjos s/n,E-46022 Valencia,Spain

Spanish Ministry of ScienceSpanish Ministry of ScienceNextGenerationEUPlanes Complementarios con CCAA(Area of Green Hydrogen and Energy)it has been carried out in the CSIC Interdisciplinary Thematic Platform(PTI+)Transición Energética Sostenible+(PTI-TRANSENER+)Universitat Politècnica de València(UPV)is gratefully acknowledged.Also,we acknowledge the support of the Servicio de Micros

PID2022-139663OB-I00CEX2021-001230-S funded by MCIN/AE 1/10.13039/501100011033PRTR-C17.11

2024

10.1016/j.jechem.2023.12.008

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.91(4)
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