Cargando…
Inducing hierarchical pores in nano-MOFs for efficient gas separation
The synthesis of metal–organic frameworks (MOFs) and their processing into structures with tailored hierarchical porosity is essential for using MOFs in the adsorption-driven gas separation process. We report the synthesis of modified Cu-MOF nanocrystals for CO(2) separation from CH(4) and N(2), pre...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2023
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10227844/ https://www.ncbi.nlm.nih.gov/pubmed/37260714 http://dx.doi.org/10.1039/d3ra01175e |
_version_ | 1785050857700589568 |
---|---|
author | Landström, Kritika Narang Nambi, Ashwin Kaiser, Andreas Akhtar, Farid |
author_facet | Landström, Kritika Narang Nambi, Ashwin Kaiser, Andreas Akhtar, Farid |
author_sort | Landström, Kritika Narang |
collection | PubMed |
description | The synthesis of metal–organic frameworks (MOFs) and their processing into structures with tailored hierarchical porosity is essential for using MOFs in the adsorption-driven gas separation process. We report the synthesis of modified Cu-MOF nanocrystals for CO(2) separation from CH(4) and N(2), prepared from DABCO (1,4-diazabicyclo[2.2.2] octane) and 9,10 anthracene dicarboxylic acid linkers with copper metal salt. The synthesis parameters were optimized to introduce mesoporosity in the microporous Cu-MOF crystals. The volumetric CO(2) adsorption capacity of the new hierarchical Cu-MOF was 2.58 mmol g(−1) at 293 K and 100 kPa with a low isosteric heat of adsorption of 28 kJ mol(−1). The hierarchical Cu-MOF nanocrystals were structured into mechanically stable pellets with a diametral compression strength exceeding 1.2 MPa using polyvinyl alcohol (PVA) as a binder. The CO(2) breakthrough curves were measured from a binary CO(2)–CH(4) (45/55 vol%) gas mixture at 293 K and 400 kPa pressure on Cu-MOF pellets to demonstrate the role of hierarchical porosity in mass transfer kinetics during adsorption. The structured hierarchical Cu-MOF pellets showed stable cyclic CO(2) adsorption capacity during 5 adsorption–desorption cycles with a CO(2) uptake capacity of 3.1 mmol g(−1) at 400 kPa and showed a high mass transfer coefficient of 1.8 m s(−1) as compared to the benchmark zeolite NaX commercialized binderless granules, suggesting that the introduction of hierarchical porosity in Cu-MOF pellets can effectively reduce the time for CO(2) separation cycles. |
format | Online Article Text |
id | pubmed-10227844 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-102278442023-05-31 Inducing hierarchical pores in nano-MOFs for efficient gas separation Landström, Kritika Narang Nambi, Ashwin Kaiser, Andreas Akhtar, Farid RSC Adv Chemistry The synthesis of metal–organic frameworks (MOFs) and their processing into structures with tailored hierarchical porosity is essential for using MOFs in the adsorption-driven gas separation process. We report the synthesis of modified Cu-MOF nanocrystals for CO(2) separation from CH(4) and N(2), prepared from DABCO (1,4-diazabicyclo[2.2.2] octane) and 9,10 anthracene dicarboxylic acid linkers with copper metal salt. The synthesis parameters were optimized to introduce mesoporosity in the microporous Cu-MOF crystals. The volumetric CO(2) adsorption capacity of the new hierarchical Cu-MOF was 2.58 mmol g(−1) at 293 K and 100 kPa with a low isosteric heat of adsorption of 28 kJ mol(−1). The hierarchical Cu-MOF nanocrystals were structured into mechanically stable pellets with a diametral compression strength exceeding 1.2 MPa using polyvinyl alcohol (PVA) as a binder. The CO(2) breakthrough curves were measured from a binary CO(2)–CH(4) (45/55 vol%) gas mixture at 293 K and 400 kPa pressure on Cu-MOF pellets to demonstrate the role of hierarchical porosity in mass transfer kinetics during adsorption. The structured hierarchical Cu-MOF pellets showed stable cyclic CO(2) adsorption capacity during 5 adsorption–desorption cycles with a CO(2) uptake capacity of 3.1 mmol g(−1) at 400 kPa and showed a high mass transfer coefficient of 1.8 m s(−1) as compared to the benchmark zeolite NaX commercialized binderless granules, suggesting that the introduction of hierarchical porosity in Cu-MOF pellets can effectively reduce the time for CO(2) separation cycles. The Royal Society of Chemistry 2023-05-30 /pmc/articles/PMC10227844/ /pubmed/37260714 http://dx.doi.org/10.1039/d3ra01175e Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/ |
spellingShingle | Chemistry Landström, Kritika Narang Nambi, Ashwin Kaiser, Andreas Akhtar, Farid Inducing hierarchical pores in nano-MOFs for efficient gas separation |
title | Inducing hierarchical pores in nano-MOFs for efficient gas separation |
title_full | Inducing hierarchical pores in nano-MOFs for efficient gas separation |
title_fullStr | Inducing hierarchical pores in nano-MOFs for efficient gas separation |
title_full_unstemmed | Inducing hierarchical pores in nano-MOFs for efficient gas separation |
title_short | Inducing hierarchical pores in nano-MOFs for efficient gas separation |
title_sort | inducing hierarchical pores in nano-mofs for efficient gas separation |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10227844/ https://www.ncbi.nlm.nih.gov/pubmed/37260714 http://dx.doi.org/10.1039/d3ra01175e |
work_keys_str_mv | AT landstromkritikanarang inducinghierarchicalporesinnanomofsforefficientgasseparation AT nambiashwin inducinghierarchicalporesinnanomofsforefficientgasseparation AT kaiserandreas inducinghierarchicalporesinnanomofsforefficientgasseparation AT akhtarfarid inducinghierarchicalporesinnanomofsforefficientgasseparation |