New Approach for Activation of N2-Selective ETS-4 Membrane for Nitrogen Separation from N2/CH4 Mixture

Fatemeh Zakeri, Mahsa Vosoughi, Hafez Maghsoudi, Joeri F.M. Denayer

Onderzoeksoutput: Articlepeer review

Samenvatting

Microporous titanosilicate ETS-4 zeotype membrane, with its 4 Å pore openings, is an adequate material for the kinetic separation of nitrogen from methane. Obtaining high N2/CH4 permselectivity, small-sized ETS-4 powder was synthesized by aging method, and then utilized as membrane seeding powder. Highly N2-selective ETS-4 membranes were fabricated utilizing a new recipe and the secondary growth approach on α-alumina supports. XRD, FESEM, and EDX studies were used to analyze the synthesized ETS-4 powder and membranes. The effect of membrane activation temperature (80–140 °C) on permeance of N2 was evaluated. In addition to N2 and CH4, the membrane permeance was also evaluated for O2 and Ar gases. Regarding the ETS-4 membranes, N2 permeance increased gradually as the activation temperature was raised in the 80–140 °C range, reaching its highest value (i.e., 2.6 × 10−8 mol m−2 s−1 Pa−1) after activation at 140 °C. The permeances of N2 and CH4 gases were measured at 30, 50, and 70 °C, and a pressure difference up to 600 kPa. N2/CH4 permselectivity of 75.19 (N2 permeance of 1.94 × 10–8 mol m-2 s−1 Pa−1) were obtained at 30 °C and 200 kPa of feed pressure. The results revealed that ETS-4 membranes have great potential for N2 removal from natural gas due to highest N2/CH4 permselectivity among the other membranes. Graphical Abstract: (Figure presented.).

Originele taal-2English
Pagina's (van-tot)1173-1185
Aantal pagina's13
TijdschriftKorean Journal of Chemical Engineering
Volume41
Nummer van het tijdschrift4
DOI's
StatusPublished - 14 feb 2024

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Publisher Copyright:
© The Author(s), under exclusive licence to Korean Institute of Chemical Engineers, Seoul, Korea 2024.

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