Electrifying Ba_(0.5)Sr_(0.5)Co_(0.8)Fe_(0.2)O_(3-δ) for focalized heating in oxygen transport membranes  

作　　者：Marwan Laqdiem Julio García-Fayos Laura Almar Alfonso J.Carrillo Álvaro Represa JoséM.López Nieto Sonia Escolástico David Catalán-Martinez Jose M.Serra 

机构地区：[1]Instituto de Tecnología Química(Universitat Politècnica de València–Consejo Superior de Investigaciones Científicas),Av.Los Naranjos s/n,E-46022 Valencia,Spain

出　　处：《Journal of Energy Chemistry》2024年第4期99-110,共12页能源化学（英文版）

基　　金：Financial support by the Spanish Ministry of Science(PID2022139663OB-I00 and CEX2021-001230-S grant funded by MCIN/AE I/10.13039/501100011033);with funding from Next Generation EU(PRTR-C17.I1)within the Planes Complementarios con CCAA(Area of Green Hydrogen and Energy);carried out in the CSIC Interdisciplinary Thematic Platform(PTI+)Transición Energética Sostenible+(PTI-TRANSENER+);the Universitat Politècnica de València(UPV);the support of the Servicio de Microscopía Elcectronica of the UPV。

摘　　要：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 provide oxygen from different sources(air,water,CO_(2),etc.),and they are more flexible in adapting to current processes,producing oxygen at 700^(-1)000℃.Furthermore,OTMs can be integrated into catalytic membrane reactors,providing new pathways for different processes.The first part of this study was focused on electrification on a traditional OTM material(Ba_(0.5)Sr_(0.5)Co_(0.8)Fe_(0.2)O_(3-δ)),imposing different electric currents/voltages along a capillary membrane.Thanks to the emerging Joule effect,the membrane-surface temperature and the associated O_(2) 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 O_(2)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 Ce_(0.8)Tb_(0.2)O_(2-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 temperature,and here,we demonstrate an improvement of the ethylene yield by reaching moderate temperatures in the reaction chamber while the O_(2) injection into the reaction can be easily fine-tuned.

关 键 词：Oxygen permeation Oxidative dehydrogenation of ethane Oxygen transport membranes Joule effect Mixed ionic-electronic conductors Catalytic membrane reactors 

分 类 号：TQ221.211[化学工程—有机化工] O643.36[理学—物理化学]