Hydrogen-Tolerant La[sub.0.6]Ca[sub.0.4]Co[sub.0.2]Fe[sub.0.8]O[sub.3–d] Oxygen Transport Membranes from Ultrasonic Spray Synthesis for Plasma-Assisted CO[sub.2] Conversion

• Published in: Membranes (Basel) Vol. 13; no. 11
• Main Authors: Rashid, Aasir, Lim, Hyunjung, Plaz, Daniel, Escobar Cano, Giamper, Bresser, Marc, Wiegers, Katharina-Sophia, Confalonieri, Giorgia, Baek, Sungho, Chen, Guoxing, Feldhoff, Armin, Schulz, Andreas, Weidenkaff, Anke, Widenmeyer, Marc
• Format: Journal Article
• Language: English
• Published: MDPI AG 01.11.2023
• Subjects: Cobalt; Ethylenediaminetetraacetic acid; Hydrogen; Rare earth metals; Raw materials; Germany
• ISSN: 2077-0375; 2077-0375
• DOI: 10.3390/membranes13110875

La[sub.0.6]Ca[sub.0.4]Co[sub.1–x]FexO[sub.3–d] in its various compositions has proven to be an excellent CO[sub.2]-resistant oxygen transport membrane that can be used in plasma-assisted CO[sub.2] conversion. With the goal of incorporating green hydrogen into the CO[sub.2] conversion process, this work takes a step further by investigating the compatibility of La[sub.0.6]Ca[sub.0.4]Co[sub.1–x]FexO[sub.3–d] membranes with hydrogen fed into the plasma. This will enable plasma-assisted conversion of the carbon monoxide produced in the CO[sub.2] reduction process into green fuels, like methanol. This requires the La[sub.0.6]Ca[sub.0.4]Co[sub.1–x]FexO[sub.3–d] membranes to be tolerant towards reducing conditions of hydrogen[sub..] The hydrogen tolerance of La[sub.0.6]Ca[sub.0.4]Co[sub.1–x]FexO[sub.3–d] (x = 0.8) was studied in detail. A faster and resource-efficient route based on ultrasonic spray synthesis was developed to synthesise the La[sub.0.6]Ca[sub.0.4]Co[sub.0.2]Fe[sub.0.8]O[sub.3–d] membranes. The La[sub.0.6]Ca[sub.0.4]Co[sub.0.2]Fe[sub.0.8]O[sub.3–d] membrane developed using ultrasonic spray synthesis showed similar performance in terms of its oxygen permeation when compared with the ones synthesised with conventional techniques, such as co-precipitation, sol–gel, etc., despite using 30% less cobalt.