Oxygen separation from air by the combined temperature swing and pressure swing processes using oxygen storage materials
- PDF / 2,989,979 Bytes
- 14 Pages / 595.276 x 790.866 pts Page_size
- 53 Downloads / 220 Views
Oxygen separation from air by the combined temperature swing and pressure swing processes using oxygen storage materials Y12x(Tb/Ce)xMnO3+d Alicja Klimkowicz1,2,* , Takao Hashizume1, Kacper Cichy3, Sayaka Tamura2, Konrad S´wierczek3,4, Akito Takasaki1, Teruki Motohashi2, and Bogdan Dabrowski5
1
Department of Engineering Science and Mechanics, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan 2 Department of Materials and Life Chemistry, Kanagawa University, Yokohama, Kanagawa 221-8686, Japan 3 Department of Hydrogen Energy, Faculty of Energy and Fuels, AGH University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland 4 AGH Centre of Energy, AGH University of Science and Technology, ul. Czarnowiejska 36, 30-054 Krakow, Poland 5 Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, 02-668 Warsaw, Poland
Received: 20 May 2020
ABSTRACT
Accepted: 23 August 2020
Hexagonal Y1-xRxMnO3?d (R: other than Y rare earth elements) oxides have been recently introduced as promising oxygen storage materials that can be utilized in the temperature swing processes for the oxygen separation and air enrichment. In the present work, the average and local structures of Tb- and Cesubstituted Y0.7Tb0.15Ce0.15MnO3?d and Y0.6Tb0.2Ce0.2MnO3?d materials were studied, and their oxygen storage-related properties have been evaluated. The fully oxidized samples show the presence of a significant amount of the highly oxygen-loaded the so-called Hex3 phase, attaining an average oxygen content of d & 0.41 for both compositions. Extensive studies of the temperature swing process conducted in air and N2 over the temperature range of 180–360 °C revealed large and reversible oxygen content changes taking place with only a small temperature differences and the high dependence on the oxygen partial pressure. Significant for practical performance, the highest reported for this class of compounds, oxygen storage capacity of 1900 lmol O g-1 in air was obtained for the optimized materials and swing process. In the combined temperature–oxygen partial pressure swing process, the oxygen storage capacity of 1200 lmol O g-1 was achieved.
Published online: 31 August 2020
Ó
The Author(s) 2020
Handling Editor: David Cann.
Address correspondence to E-mail: [email protected]
https://doi.org/10.1007/s10853-020-05158-5
15654 Introduction In recent years, oxygen production has grown in importance because of the increasing demand from the industry and the health sectors. The oxygen-enriched gas is mainly utilized in the steel industry, welding, ammonia and methanol production, space technologies, cleaning of the wastewater, as well as oxygen therapy, and even oxygen as a recreation agent [1–4]. Besides conventional cryogenic-based oxygen production methods, alternative means using ceramic membranes are also gaining researchers’ attention [5–7]. Another prospective method for oxygen production is the usage of the so-called oxygen storage materials (OSMs). These materials possess an ability
Data Loading...
