Perovskite Membranes: Advancements and Challenges in Gas Separation, Production, and Capture

Abstract

Perovskite membranes have gained considerable attention in gas separation and production due to their unique properties such as high selectivity and permeability towards various gases. These membranes are composed of perovskite oxides, which have a crystalline structure that can be tailored to enhance gas separation performance. In oxygen enrichment, perovskite membranes are employed to separate oxygen from air, which is then utilized in a variety of applications such as combustion and medical devices. Moreover, perovskite membranes are investigated for carbon capture applications to reduce greenhouse gas emissions. Further, perovskite membranes are employed in hydrogen production, where they aid in the separation of hydrogen from other gases such as methane and carbon dioxide. This process is essential in the production of clean hydrogen fuel for various applications such as fuel cells and transportation. This paper provides a review on the utilization and role of perovskite membranes in various gas applications, including oxygen enrichment, carbon capture, and hydrogen production.

Perovskite Oxides: Syntheses and Perspectives on Their Application for Nitrate Reduction

“…86 For these synthesis techniques to provide the appropriate properties in the generated perovskite materials, an exact setup for high-quality samples is required. 87 Gas-state synthesis techniques are divided into three groups, namely; synthesis at the temperature of crystallization in an appropriate environment, fabrication at a temperature between 500 and 800 °C, followed by a postannealing process at a higher temperature, and fabrication with the substrate heated to a very high temperature afterward for postannealing. 43,64,87 The perovskite materials can be produced utilizing gas-state processes for a range of purposes, including photocatalysts, solar cells, optical and anticorrosion coatings, capacitor dielectrics, semiconductor devices, bioimplantable devices, chemical reactors, and catalysts.…”

“…There are various techniques for the preparation of thin films, such as chemical vapor deposition, molecular beam epitaxy, laser ablation, direct current (DC) sputtering, magnetron sputtering, thermal evaporation, and electron beam evaporation. ,, These methods are entirely distinct from other synthesis methods and are used to generate thin films for various electronic gadgets and solar cells made of perovskite materials . For these synthesis techniques to provide the appropriate properties in the generated perovskite materials, an exact setup for high-quality samples is required . Gas-state synthesis techniques are divided into three groups, namely; synthesis at the temperature of crystallization in an appropriate environment, fabrication at a temperature between 500 and 800 °C, followed by a postannealing process at a higher temperature, and fabrication with the substrate heated to a very high temperature afterward for postannealing. ,, …”

“… 86 For these synthesis techniques to provide the appropriate properties in the generated perovskite materials, an exact setup for high-quality samples is required. 87 Gas-state synthesis techniques are divided into three groups, namely; synthesis at the temperature of crystallization in an appropriate environment, fabrication at a temperature between 500 and 800 °C, followed by a postannealing process at a higher temperature, and fabrication with the substrate heated to a very high temperature afterward for postannealing. 43 , 64 , 87 …”

Characterization of Silicate Glass/Mullite Composites Based on Coal Fly Ash Cenospheres as Effective Gas Separation Membranes

“…The ability of membranes to separate a mixture of two gases is generally defined as selectivity. For SiG/M composites, the ideal selectivity for αHe/Ne, which is the ratio of pure gas permeability (Table 10), is significantly higher than that for polysulfone [31], and it corresponds to silicate glass [34,51,52].…”

“…At present, membrane gas separation is entering the stage of the directional design of new effective, highly selective, and highly permeable membrane materials characterized by an improved microstructure, chemical resistance, strength, and stability at elevated temperatures. Intensive research aims to develop carbon-based [25,26], organic-framework [27], mixed-matrix [28,29], and inorganic membranes [30,31].…”