BaTiO3-based thermistor hollow fibers prepared using a phase inversion spinning process for energy efficient gas sorption. Issue 3 (March 2022)

• Record Type: Journal Article
• Authors: Bell, Jon G.; Cavasin, N.; Knorpp, A.J.; Graule, T.; Stuer, M.
• Is Part Of: Journal of the European Ceramic Society. Volume 42:Issue 3(2022)
• Page Start: 981
• Page End: 992
• Publication Date: 2022-03
• Subjects: Phase inversion -- Hollow fibers -- BaTiO3 -- PTCR effect -- Zeolites -- CO2 adsorption; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2021.10.049
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Positive temperature coefficient of resistivity (PTCR) hollow fibers that exhibit self-regulating heating characteristics have potential applications in temperature-swing adsorption systems (TSA), such as CO2 recovery and drying of compressed air. La-doped BaTiO3 hollow fibers displaying a PTCR effect were produced by phase inverting a casting solution consisting of N-methly-2-Pyrrolidone, polymethyl methacrylate, polyvinylpyrrolidone, BaTiO3, TiO2, and La2 O3 through a spinneret into a coagulating waterbath. This was followed by polymer debinding, high temperature sintering between 1350−1400 °C and annealing in air at 1175 °C to produce hollow fibers of the composition Ba0.9975 La0.0025 TiO3 . Hydrothermal synthesis was implemented to deposit an adsorbent porous zeolite X layer within the hollow fiber lumen, which was confirmed by electron dispersive X-ray spectroscopy and CO2 adsorption at 0 °C. Hence, these materials can be applied to energy efficient TSA gas separation processes. The results are discussed in terms of hollow fiber microstructure, adsorption characteristics and electrical properties.