Effect of aprotic solvent on characteristics of Al2O3 ceramic hollow fiber substrates prepared by phase inversion for hydrogen permeation applications. Issue 3 (3rd July 2022)

• Record Type: Journal Article
• Authors: Magnone, Edoardo; Lee, Seung Hwan; Shin, Min Chang; Zhuang, Xuelong; Hwang, Jae Yeon; Lee, Jeong In; Park, Jung Hoon
• Is Part Of: Journal of Asian ceramic societies. Volume 10:Issue 3(2022)
• Page Start: 674
• Page End: 686
• Publication Date: 2022-07-03
• Subjects: phase-inversion process -- aprotic solvent -- Al2O3 -- alumina hollow fiber support -- microstructure; Ceramics -- East Asia -- Periodicals; Materials science -- Periodicals; 620.1405
• DOI: 10.1080/21870764.2022.2104712
• Languages: English
• ISSNs: 2187-0764

Abstract

ABSTRACT: The phase inversion procedure was used to prepare Al2 O3 ceramic hollow fiber substrates (AlCHFS) utilizing the dimethyl sulfoxide (DMSO), N, N-dimethylacetamide (DMAC), and 1-methyl-2-pyrrolidone (NMP) aprotic solvents. Different aprotic solvent and non-solvent (water) interactions were used to calibrate different ceramic oxide substrates. AlCHFS with an asymmetrical structure consisting of a finger-like structure on the lumen side and a pore structure on the shell side was obtained using an aprotic solvent/non-solvent pair with a high total Hildebrand solubility (δt). As the aprotic strength was reduced, the finger-like structure on the shell sides became more prominent. Hydrogen permeation studies conducted between 350°C and 450°C reveal that the Pd-coated AlCHFS produced from DMAC aprotic solvent has the maximum hydrogen flux (~0.24 mol m −2 s −1 ). The activation energy for the thermally activated hydrogen transport process through the Pd-coated AlCHFSs is determined to be around 11.06–14.61 kJ mol −1 in the temperature range of 350°C to 450°C, and it increases linearly with increasing surface porosity of ceramic oxide substrate.