Direct synthesis of organic salt-derived porous carbons for enhanced CO<subscript>2</subscript> and methane storage.
In: Journal of Materials Chemistry A, Jg. 11 (2023-04-07), Heft 13, S. 6952-6965
Online
academicJournal
Zugriff:
The direct carbonisation of a carbon-rich organic salt, potassium phthalimide (PPI), generates porous carbons with porosity suitable for energy-related gas storage applications. The PPI-derived carbons exhibit high surface area of up to 2889 m 2 g −1 and pore volume of up to 1.36 cm 3 g −1 , and the porosity can be readily tailored by choice of the carbonisation temperature and, to a lesser extent, carbonisation time. Depending on the preparation conditions, the PPI-derived carbons can be tailored to have ideal porosity for CO 2 uptake at low pressure, which at 25 °C reaches 1.7 mmol g −1 and 5.2 mmol g −1 at 0.15 bar and 1 bar, respectively. The carbons also exhibit very impressive methane storage capacities of up to 18.2 mmol g −1 at 25 °C and 100 bar. An important finding is that the carbons may be readily compacted to a high packing density of up to 1.10 g cm −3 with retention of their textural properties. The consequence of the high packing density of the PPI-derived carbons, coupled with their high gravimetric methane uptake, is that they achieve exceptionally high volumetric uptake of up to 338 cm 3 (STP) cm −3 at 25 °C and 100 bar, and volumetric working capacity (100–5 bar pressure swing) of 249 cm 3 (STP) cm −3 , which are significantly higher than most porous carbons and metal–organic frameworks (MOFs). PPI is thus a very attractive precursor for the simple synthesis of porous carbons with an unrivalled mix of properties for CO 2 and methane storage applications. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Materials Chemistry A is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Titel: |
Direct synthesis of organic salt-derived porous carbons for enhanced CO<subscript>2</subscript> and methane storage.
|
---|---|
Autor/in / Beteiligte Person: | Alali, Ibtisam ; Mokaya, Robert |
Link: | |
Zeitschrift: | Journal of Materials Chemistry A, Jg. 11 (2023-04-07), Heft 13, S. 6952-6965 |
Veröffentlichung: | 2023 |
Medientyp: | academicJournal |
ISSN: | 2050-7488 (print) |
DOI: | 10.1039/d3ta00044c |
Sonstiges: |
|