Search
Abstract
The ability of reduced graphene oxide aerogels (rGOAs) for challenging gas-phase separation was investigated with hexane isomers and benzene (C6 hydrocarbons) using inverse gas chromatography (IGC). For the first, rGOAs were synthesized with sodium dithionite (DTN) as a reductant. Experiments revealed that the most optimal DTN to graphene oxide mass ratio was 2:1, resulting in the highest specific surface area of 432.3 m2 g−1 and the highest degree of graphitization among analyzed samples. C6 hydrocarbon adsorption tests demonstrated the dominant role of the kinetic effect for the adsorption of branched and cyclic hexane isomers -the partition coefficient decreased as the molecule kinetic diameter increased. The contribution of thermodynamic effects was distinguished for molecules with uneven charge distribution. A comparison of the partition coefficient ratios for different pairs of hydrocarbons demonstrated the potential of rGOAs in separating various C6 hydrocarbons. The selectivity, calculated from binary-component adsorption tests of benzene (Bz)/cC6 equimolar mixture, was 13.7, 8.5 and 2.8 for DTN4, DTN2, and DTN1. The research indicates that rGOAs may have potential as adsorbents for the selective separation of hydrocarbons, however, the competitive adsorption and performance at high surface coverages of adsorbates have to be accounted for in further research to assess the applicability of rGOAs reliably.
Citations
-
0
CrossRef
-
0
Web of Science
-
0
Scopus
Authors (4)
-
Emilia Gontarek-Castro
Cite as
Full text
full text is not available in portal
Keywords
Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
JOURNAL OF CHROMATOGRAPHY A
no. 1736,
ISSN: 0021-9673 - Language:
- English
- Publication year:
- 2024
- Bibliographic description:
- Plata Gryl M., Castro Munoz R., Gontarek-Castro E., Boczkaj G.: Separation of C6 hydrocarbons on sodium dithionite reduced graphene oxide aerogels// JOURNAL OF CHROMATOGRAPHY A -Vol. 1736, (2024), s.465357-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.chroma.2024.465357
- Sources of funding:
-
- Free publication
- Verified by:
- Gdańsk University of Technology
seen 34 times
Recommended for you
Graphene oxide aerogels for adsorptive separation of aromatic hydrocarbons and cycloalkanes
- M. Plata Gryl,
- R. Castro Munoz,
- E. Gontarek-Castro
- + 2 authors
MoS2-containing composite membranes for separation of environmental energy-relevant liquid and gas mixtures: A comprehensive review
- F. Janjhi,
- I. Chandio,
- D. Janwery
- + 5 authors