Oxidative dehydrogenation of ethylbenzene over CMK-1 and CMK-3 carbon replicas with various mesopore architectures
Authors:
- Sebastian Jarczewski,
- Marek Drozdek,
- Piotr Michorczyk,
- Carlos Cuadrado-Collados,
- Jesus Gandara-Loe,
- Joaquín Silvestre-Albero,
- Piotr Kuśtrowski
Abstract
Nanoreplication strategy was used for the synthesis of mesoporous ordered carbon materials with various pore architectures and surface compositions. Two different silica templates (regular MCM-48 and hexagonal SBA-15) were filled with a carbon precursor – poly(furfuryl alcohol) or sucrose – by the precipitation polycondensation or incipient wetness impregnation, respectively. Furthermore, the resulting carbon precursor/silica composites were carbonized at various temperatures from the range of 650-1050 °C. It was shown that the carbon precursor and method of its deposition strongly influenced structural and textural parameters of the final carbon material determined by XRD, low-temperature N2 adsorption and TEM. The specific surface area of the sucrose-based CMK-3 was ca. 45% higher than the poly(furfuryl alcohol)-derived replicas. On the other hand, this effect was not observed for CMK-1 replicas. The carbonization temperatures tuned up the content of C=O moieties on the surface of carbon replica calculated based on temperature-programmed desorption (TPD) profiles. Obviously, the concentration of C=O functionalities was correlated to the catalytic activity in the oxidative dehydrogenation of ethylbenzene (EB) to styrene. Nevertheless, the CMK-1 replicas were more sensitive to the C=O concentration in terms of EB conversion. Hence, we discussed carefully the role of the pore geometry in the catalytic performance of the studied carbon materials. For the CMK-1 and CMK-3 carbon replicas with comparable chemical and textural properties, but different pore structure, the initial EB conversion varied considerably, reaching 34.2% and 21.6%, respectively, at 350 °C and EB/O2 ratio = 1.0.
- Record ID
- CUT1105877eeea04a9ab78f65950f435b45
- Publication categories
- ;
- Author
- Journal series
- Microporous and Mesoporous Materials, ISSN 1387-1811, e-ISSN 1873-3093
- Issue year
- 2018
- Vol
- 271
- Pages
- 262-272
- Other elements of collation
- fot.; rys.; tab.; wykr.; Bibliografia (na s.) - 272; Bibliografia (liczba pozycji) - 43; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 271
- Keywords in English
- ordered mesoporous carbon, CMK-1, CMK-3, oxidative dehydrogenation, ethylbenzene
- DOI
- DOI:10.1016/j.micromeso.2018.06.007 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S1387181118303159 Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 35
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT1105877eeea04a9ab78f65950f435b45/
- URN
urn:pkr-prod:CUT1105877eeea04a9ab78f65950f435b45
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.