Chemically activated poly(furfuryl alcohol)-derived CMK-3 carbon catalysts for the oxidative dehydrogenation of ethylbenzene

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Title: Chemically activated poly(furfuryl alcohol)-derived CMK-3 carbon catalysts for the oxidative dehydrogenation of ethylbenzene
Authors: Janus, Paula | Janus, Rafał | Kuśtrowski, Piotr | Jarczewski, Sebastian | Wach, Anna | Silvestre Albero, Ana | Rodríguez Reinoso, Francisco
Research Group/s: Materiales Avanzados
Center, Department or Service: Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Mesoporous carbon | CMK-3 | Surface activation | Oxidative dehydrogenation | Ethylbenzene
Knowledge Area: Química Inorgánica
Issue Date: 15-Oct-2014
Publisher: Elsevier
Citation: Catalysis Today. 2014, 235: 201-209. doi:10.1016/j.cattod.2014.03.019
Abstract: The surface of CMK-3 carbon, synthesized by the reversible replication of mesoporous silica (SBA-15) using poly(furfuryl alcohol) as a carbon precursor, was activated by wet oxidation with an aqueous solution of HNO3 or H2O2. The process was performed at 50 °C using solution containing different concentrations of the oxidizing agent. It was found that during the modification no significant changes in textural and structural properties of CMK-3 replica occurred. However, the treatment resulted in the formation of appreciable amounts of surface species containing oxygen. XPS and DRIFT spectroscopy allowed to identify and quantify the surface functional groups. Their stability was studied by TG-FTIR measurements. CO and CO2 were found as main gaseous products evolved during thermal decomposition under inert atmosphere. Finally, the modified samples were tested in the catalytic oxidative dehydrogenation of ethylbenzene to styrene at 350 °C in the presence of oxygen as an oxidizing agent (at O2/ethylbenzene molar ratio of 1.0 and 3.0). At the beginning of the catalytic run, the highest styrene yield and selectivity was achieved at the lower O2 content over the catalysts treated with nitric acid. Nevertheless, all studied catalysts underwent a gradual deactivation due to coke formation and changes in the distribution of surface moieties.
Sponsor: This work was supported by the Polish National Science Centre under the grant no. DEC–2011/01/N/ST5/05595. The research was carried out with the equipment purchased thanks to the financial support of the European Regional Development Fund in the framework of the Polish Innovation Economy Operational Program(contract No. POIG.02.01.00-12-023/08).
ISSN: 0920-5861 (Print) | 1873-4308 (Online)
DOI: 10.1016/j.cattod.2014.03.019
Language: eng
Type: info:eu-repo/semantics/article
Peer Review: si
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