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Co-pelletization of a zirconium-based metalorganic framework (UiO-66) with polymer nanofibers for improved useable capacity in hydrogen storage

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dc.contributor.author Bambalaza, Sonwabo E
dc.contributor.author Langmi, HW
dc.contributor.author Mokaya, R
dc.contributor.author Musyoka, Nicholas M
dc.contributor.author Khotseng, LE
dc.date.accessioned 2021-04-10T11:13:09Z
dc.date.available 2021-04-10T11:13:09Z
dc.date.issued 2020-12
dc.identifier.citation Bambalaza, S.E., Langmi, H., Mokaya, R., Musyoka, N.M. & Khotseng, L. 2020. Co-pelletization of a zirconium-based metalorganic framework (UiO-66) with polymer nanofibers for improved useable capacity in hydrogen storage. <i>International Journal of Hydrogen Energy, 46(12).</i> http://hdl.handle.net/10204/11969 en_ZA
dc.identifier.issn 0360-3199
dc.identifier.issn 1879-3487
dc.identifier.uri https://doi.org/10.1016/j.ijhydene.2020.12.049
dc.identifier.uri https://www.sciencedirect.com/science/article/pii/S0360319920345833
dc.identifier.uri http://hdl.handle.net/10204/11969
dc.description.abstract We report on a concept of co-pelletization using mechanically robust hydroxylated UiO-66 to develop a metal-organic framework (MOF) monolith that contains 5 wt% electrospun polymer nanofibers, and consists of an architecture with alternating layers of MOF and nanofiber mats. The polymers of choice were the microporous Polymer of Intrinsic Microporosity (PIM-1) and non-porous polyacrylonitrile (PAN). Co-pelletized UiO-66/PIM-1 and UiO-66/PAN monoliths retain no less than 85% of the porosity obtained in pristine powder and pelletized UiO-66. The composition of the pore size distribution in co-pelletized UiO-66/PIM-1 and UiO-66/PAN monoliths is significantly different to that of pristine UiO-66 forms, with pristine UiO-66 forms showing 90% of the pore apertures in the micropore region and both UiO-66/nanofiber monoliths showing a composite micro-mesoporous pore size distribution. The co-pelletized UiO-66/nanofiber monoliths obtained improved useable H2 capacities in comparison to pristine UiO-66 forms, under isothermal pressure swing conditions. The UiO-66/PIM-1 monolith constitutes the highest gravimetric (and volumetric) useable capacities at 2.3 wt% (32 g L−1) in comparison to 1.8 wt% (12 g L−1) and 1.9 wt% (29 g L−1) obtainable in pristine UiO-66 powder and UiO-66 pellet, respectively. The co-pelletized UiO-66/PAN monolith, however, shows a significantly reduced surface area by up to 50% less in comparison to pristine UiO-66, but its pore volume only 13% less in comparison to pristine UiO-66. As a result, total gravimetric H2 capacity of the co-pelletized UiO-66/PAN monolith is 50% less in comparison to that of pristine UiO-66, but crucially the useable volumetric H2 capacity is 50% higher for the UiO-66/PAN monolith in comparison to pristine UiO-66 powder. The co-pelletization strategy provides a simple method for generating hierarchical porosity into an initially highly microporous MOF without changing the structure of the MOF through complex chemical modifications. The UiO-66/nanofiber monoliths offer improvements to the typically low H2 useable capacities in highly microporous MOFs, and open new opportunities towards achieving system-level H2 storage targets. en_US
dc.format Abstract en_US
dc.language.iso en en_US
dc.source International Journal of Hydrogen Energy, 46(12) en_US
dc.subject Co-pelletization en_US
dc.subject Hydrogen useable capacity en_US
dc.subject Hierarchical porosity en_US
dc.subject Metal-organic framework en_US
dc.subject UiO-66 en_US
dc.title Co-pelletization of a zirconium-based metalorganic framework (UiO-66) with polymer nanofibers for improved useable capacity in hydrogen storage en_US
dc.type Article en_US
dc.description.pages 8607-8620 en_US
dc.description.note © 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's website: https://www.sciencedirect.com/science/article/pii/S0360319920345833 en_US
dc.description.cluster Chemicals en_US
dc.description.impactarea Hydrogen SA en_US
dc.identifier.apacitation Bambalaza, S. E., Langmi, H., Mokaya, R., Musyoka, N. M., & Khotseng, L. (2020). Co-pelletization of a zirconium-based metalorganic framework (UiO-66) with polymer nanofibers for improved useable capacity in hydrogen storage. <i>International Journal of Hydrogen Energy, 46(12)</i>, http://hdl.handle.net/10204/11969 en_ZA
dc.identifier.chicagocitation Bambalaza, Sonwabo E, HW Langmi, R Mokaya, Nicholas M Musyoka, and LE Khotseng "Co-pelletization of a zirconium-based metalorganic framework (UiO-66) with polymer nanofibers for improved useable capacity in hydrogen storage." <i>International Journal of Hydrogen Energy, 46(12)</i> (2020) http://hdl.handle.net/10204/11969 en_ZA
dc.identifier.vancouvercitation Bambalaza SE, Langmi H, Mokaya R, Musyoka NM, Khotseng L. Co-pelletization of a zirconium-based metalorganic framework (UiO-66) with polymer nanofibers for improved useable capacity in hydrogen storage. International Journal of Hydrogen Energy, 46(12). 2020; http://hdl.handle.net/10204/11969. en_ZA
dc.identifier.ris TY - Article AU - Bambalaza, Sonwabo E AU - Langmi, HW AU - Mokaya, R AU - Musyoka, Nicholas M AU - Khotseng, LE AB - We report on a concept of co-pelletization using mechanically robust hydroxylated UiO-66 to develop a metal-organic framework (MOF) monolith that contains 5 wt% electrospun polymer nanofibers, and consists of an architecture with alternating layers of MOF and nanofiber mats. The polymers of choice were the microporous Polymer of Intrinsic Microporosity (PIM-1) and non-porous polyacrylonitrile (PAN). Co-pelletized UiO-66/PIM-1 and UiO-66/PAN monoliths retain no less than 85% of the porosity obtained in pristine powder and pelletized UiO-66. The composition of the pore size distribution in co-pelletized UiO-66/PIM-1 and UiO-66/PAN monoliths is significantly different to that of pristine UiO-66 forms, with pristine UiO-66 forms showing 90% of the pore apertures in the micropore region and both UiO-66/nanofiber monoliths showing a composite micro-mesoporous pore size distribution. The co-pelletized UiO-66/nanofiber monoliths obtained improved useable H2 capacities in comparison to pristine UiO-66 forms, under isothermal pressure swing conditions. The UiO-66/PIM-1 monolith constitutes the highest gravimetric (and volumetric) useable capacities at 2.3 wt% (32 g L−1) in comparison to 1.8 wt% (12 g L−1) and 1.9 wt% (29 g L−1) obtainable in pristine UiO-66 powder and UiO-66 pellet, respectively. The co-pelletized UiO-66/PAN monolith, however, shows a significantly reduced surface area by up to 50% less in comparison to pristine UiO-66, but its pore volume only 13% less in comparison to pristine UiO-66. As a result, total gravimetric H2 capacity of the co-pelletized UiO-66/PAN monolith is 50% less in comparison to that of pristine UiO-66, but crucially the useable volumetric H2 capacity is 50% higher for the UiO-66/PAN monolith in comparison to pristine UiO-66 powder. The co-pelletization strategy provides a simple method for generating hierarchical porosity into an initially highly microporous MOF without changing the structure of the MOF through complex chemical modifications. The UiO-66/nanofiber monoliths offer improvements to the typically low H2 useable capacities in highly microporous MOFs, and open new opportunities towards achieving system-level H2 storage targets. DA - 2020-12 DB - ResearchSpace DP - CSIR J1 - International Journal of Hydrogen Energy, 46(12) KW - Co-pelletization KW - Hydrogen useable capacity KW - Hierarchical porosity KW - Metal-organic framework KW - UiO-66 LK - https://researchspace.csir.co.za PY - 2020 SM - 0360-3199 SM - 1879-3487 T1 - Co-pelletization of a zirconium-based metalorganic framework (UiO-66) with polymer nanofibers for improved useable capacity in hydrogen storage TI - Co-pelletization of a zirconium-based metalorganic framework (UiO-66) with polymer nanofibers for improved useable capacity in hydrogen storage UR - http://hdl.handle.net/10204/11969 ER - en_ZA
dc.identifier.worklist 24265 en_US


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