Search
Abstract
Efficient separation of benzene and cyclohexane has critical importance for production of commodity chemicals, and is one of the most challenging separations in the industry. Physisorption by recyclable, porous solids has a significant potential in substituting energy-intensive azeotropic or extractive distillation methods. Reduced graphene oxide aerogels (rGOAs) are emerging materials holding great promise for connecting unique properties of 2D graphene with ordinary 3D materials. The benzene/cyclohexane separation on rGOAs self-assembled by the chemical reduction with l-ascorbic acid, sodium bisulphite and (for the first time) sodium dithionite was studied by dynamic gas adsorption methods, and the adsorption performance was analysed in relation to aerogels physicochemical properties. The aerogel reduced with sodium dithionite (rGOA_DTN) had the highest reduction degree and specific surface area (461.2 m2g-1), with the highest contribution of mesopores. It was also the sample with the uppermost uptake of benzene and cyclohexane. The binary component adsorption on rGOA_DTN resulted in the selectivity of the adsorption of benzene over cyclohexane of 2.1. Adsorption-desorption studies demonstrated the excellent thermal stability of the adsorbent in the long-run operation. Because the adsorption capacity did not correlate with the mesopores but with macropores surface area, the selectivity of the adsorption was attributed to the different physicochemical structure of aerogels surface. The benzene molecule interacted strongly by specific C-H···π interactions, while the cyclohexane molecule was excluded from the surface of aerogels because of its shape/size. Results demonstrated that rGOAs can be a versatile and flexible platform for adsorptive gas-phase hydrocarbons separation.
Citations
-
0
CrossRef
-
0
Web of Science
-
0
Scopus
Authors (5)
-
Emilia Gontarek-Castro
- Department of Environmental Technology, Faculty of Chemistry, University of Gdansk, Wita Stwosza Str. 63, 80-308 Gdansk, Poland
-
Alan Miralrio
- Tecnologico de Monterrey, Escuela de Ingeniería y Ciencias, Ave. Eugenio Garza Sada 2501, Monterrey, N.L., 64849, Mexico
Cite as
Full text
- Publication version
- Accepted or Published Version
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.cej.2024.152782
- License
-
open in new tab
Keywords
Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
CHEMICAL ENGINEERING JOURNAL
no. 493,
ISSN: 1385-8947 - Language:
- English
- Publication year:
- 2024
- Bibliographic description:
- Plata Gryl M., Castro Munoz R., Gontarek-Castro E., Miralrio A., Boczkaj G.: Graphene oxide aerogels for adsorptive separation of aromatic hydrocarbons and cycloalkanes// CHEMICAL ENGINEERING JOURNAL -Vol. 493, (2024), s.152782-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.cej.2024.152782
- Sources of funding:
-
- COST_FREE
- Verified by:
- Gdańsk University of Technology
seen 20 times
Recommended for you
Synthesis and modification of reduced graphene oxide aerogels for biofuel cell applications
- I. Kondratowicz,
- K. Sadowska,
- D. Majdecka
- + 1 authors
Tailoring properties of reduced graphene oxide by oxygen plasma treatment
- I. Kondratowicz,
- M. Nadolska,
- S. Şahin
- + 6 authors