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. 2022 Nov 2;12(11):1090.
doi: 10.3390/membranes12111090.

Alginate Ag for Composite Hollow Fiber Membrane: Formation and Ethylene/Ethane Gas Mixture Separation

Evgenia Dmitrieva  1 , Evgenia Grushevenko  1 , Daria Razlataya  1 , George Golubev  1 , Tatiana Rokhmanka  1 , Tatyana Anokhina  1 , Stepan Bazhenov  1
Affiliations

Alginate Ag for Composite Hollow Fiber Membrane: Formation and Ethylene/Ethane Gas Mixture Separation

Evgenia Dmitrieva et al. Membranes (Basel). .

Abstract

Membranes based on natural polymers, in particular alginate, are of great interest for various separation tasks. In particular, the possibility of introducing silver ions during the crosslinking of sodium alginate makes it possible to obtain a membrane with an active olefin transporter. In this work, the creation of a hollow fiber composite membrane with a selective layer of silver alginate is proposed for the first time. The approach to obtaining silver alginate is presented in detail, and its sorption and transport properties are also studied. It is worth noting the increased selectivity of the material for the ethylene/ethane mixture (more than 100). A technique for obtaining a hollow fiber membrane from silver alginate has been developed, and its separating characteristics have been determined. It is shown that in thin layers, silver alginate retains high values of selectivity for the ethylene/ethane gas pair. The obtained gas transport properties demonstrate the high potential of using membranes based on silver alginate for the separation of an olefin/paraffin mixture.

Keywords: composite membrane; ethylene–ethane separation; gas separation properties; silver alginate.

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Conflict of interest statement

The authors declare no conflict of interest. The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript; or in the decision to publish the results.

Figures

Figure 1
Figure 1
Schematic representation of the various transport mechanisms.
Figure 2
Figure 2
Silver distribution along the thickness of cross-linked alginate.
Figure 3
Figure 3
Effect of cross-linking time with 0.7 M AgNO3 on silver concentration in the cross-linked alginate matrix and on the sorption of water by the dried films.
Figure 4
Figure 4
Visible (A) and Raman (B) spectra of sodium alginate and silver alginate.
Figure 5
Figure 5
Schematic representation of the crosslinked polymer by nanoparticles (NP) Ag.
Figure 6
Figure 6
Sorption of ethane and ethylene by sodium alginate (A) and silver alginate (B) samples.
Figure 7
Figure 7
Schematic representation of the appearance of composite hollow fiber membranes and the problems encountered during their creation by different methods: (A)—initial module with hollow fiber porous support, (B)—composite hollow fiber silver alginate membrane with silver alginate cork and silver alginate into the module walls, (C)—defect composite hollow fiber silver alginate membrane, (D)—defect free composite hollow fiber silver alginate membrane.
Figure 8
Figure 8
Variation of selective silver alginate layer thickness when varying the alginate concentration (1% wt.—first column, 2% wt.—second column, 3% wt. third column) and crosslinking time of the polymer (one layer—5 s (first row) and 1 min (second row)).
Figure 9
Figure 9
Changes in the thickness of the silver alginate selective layer when varying the alginate concentration (1% wt.—first column, 2% wt.—second column, 3% wt. third column)and crosslinking time of the polymer (two layers—5 s (first row) and 1 min (second row)).
Figure 10
Figure 10
The absence of a polymer selective layer when using 0.1% sodium alginate solution using 0.1% sodium alginate solution.
Figure 11
Figure 11
Effect of a selective layer of silver alginate on water flux.
Figure 12
Figure 12
Permeability of flat (A) and hollow-fiber (B) composite membranes with a silver alginate selective layer for pure gases. Thickness of Alg-Agis 20 µm.
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References

    1. Bernardo P., Drioli E. Membrane engineering for a sustainable production of ethylene. Fuel Process. Technol. 2021;212:106624. doi: 10.1016/j.fuproc.2020.106624. - DOI
    1. Alshammari A., Kalevaru V.N., Bagabas A., Martin A. Petrochemical Catalyst Materials, Processes, and Emerging Technologies. IGI Global; Hershey PA, USA: 2016. Production of ethylene and its commercial importance in the global market; pp. 82–115.
    1. Wu Y., Nian P., Liu Z., Zhang J., Zhang H., Wang N., Li Y. Separation of acetylene, ethylene and ethane over single layered graphdiyne membranes: Performance and insights from quantum mechanical views. J. Environ. Chem. Eng. 2022;10:107733. doi: 10.1016/j.jece.2022.107733. - DOI
    1. Soave G.S., Gamba S., Pellegrini L.A., Bonomi S. Feed-splitting technique in cryogenic distillation. Ind. Eng. Chem. Res. 2006;45:5761–5765. doi: 10.1021/ie051343e. - DOI
    1. Noonikara-Poyil A., Cui H., Yakovenko A.A., Stephens P.W., Lin R.B., Wang B., Dias H.R. A Molecular Compound for Highly Selective Purification of Ethylene. AngewandteChemie. 2021;133:27390–27394. - PubMed

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