Utilization of carbon dioxide in oxidative dehydrogenation reactions
Raju, G; Reddy, BM; Park, SEon
| HERO ID | 4706161 |
|---|---|
| In Press | No |
| Year | 2012 |
| Title | Utilization of carbon dioxide in oxidative dehydrogenation reactions |
| Authors | Raju, G; Reddy, BM; Park, SEon |
| Journal | Indian Journal of Chemistry. Section A |
| Volume | 51 |
| Issue | 9-10 |
| Page Numbers | 1315-1324 |
| Abstract | Utilization of CO 2 as a feedstock for synthesis of chemicals is an alternate and most promising option for CO 2 abatement. In the present study, CO 2 has been utilized as a soft oxidant for oxidative dehydrogenation of ethylbenzene and n-butane to the corresponding olefins. For this, TiO 2?ZrO 2 (TZ) mixed oxide-supported V 2O 5, C eO 2 and V 2O 5-C eO 2 catalysts has been synthesized, characterized and evaluated for the oxidative dehydrogenation reactions. The physicochemical characterization has been achieved by various techniques such as, powder X-ray diffraction, CO 2 and NH3 temperature-preprogrammed desorption, temperature-preprogrammed reduction, X-ray photoelectron spectroscopy and BET surface area methods. XRD analysis of the samples calcined at 550 °C indicates that the impregnated active components are in a highly dispersed state on the support. XP spectra shows the existence of vanadium and cerium in V 4+ and C e4+/C e3+ oxidation states, respectively. Among the various catalysts investigated, V 2O 5?C eO 2/TiO 2?ZrO 2 exhibits a high conversion and product selectivity for the oxidative dehydrogenation of ethyl benzene. On the other hand, a high conversion and selectivity in the oxidative dehydrogenation of n-butane is noted over V 2O 5/SnO 2?Z rO 2 mixed oxide catalyst. The combined acid-base and redox properties of the catalysts play a major role in these reactions. In particular, the characterization studies reveal that mixed oxides show a high specific surface area, superior acid-base properties and better redox characteristics. All these properties enhance the catalytic performance of mixed oxide catalysts. |
| Wosid | WOS:000309370500012 |
| Url | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84866242597&partnerID=40&md5=bae9940aafae66d5aa0b52d73123016b |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal: Indian Journal of Chemistry - Section A Inorganic, Physical, Theoretical and Analytical Chemistry ISSN: |
| Is Public | Yes |
| Language Text | English |
| Keyword | Ethylbenzene; n-Butane; Styrene; C4 olefins; Oxidative dehydrogenation; Carbon dioxide abatement; Dehydrogenation; Mixed oxide catalysts; Supported catalysts; Titania; Zirconia; Ceria; Vanadia |
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