Selective nano alumina supported vanadium oxide catalysts for oxidative dehydrogenation of ethylbenzene to styrene using CO2 as soft oxidant
Nano alumina-supported V2O5 catalysts with different loadings have been tested for the dehydrogenation of ethylbenzene with CO2 as an oxidant. High surface area nano-alumina was prepared and used as support for V2O5 as the catalyst. The catalysts were synthesized by impregnation techniques followed...
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| Format: | Article |
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Egyptian Petroleum Research Institute
2013-12-01
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| Series: | Egyptian Journal of Petroleum |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110062113000767 |
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| author | A.M. Elfadly A.M. Badawi F.Z. Yehia Y.A. Mohamed M.A. Betiha A.M. Rabie |
| author_facet | A.M. Elfadly A.M. Badawi F.Z. Yehia Y.A. Mohamed M.A. Betiha A.M. Rabie |
| author_sort | A.M. Elfadly |
| collection | DOAJ |
| description | Nano alumina-supported V2O5 catalysts with different loadings have been tested for the dehydrogenation of ethylbenzene with CO2 as an oxidant. High surface area nano-alumina was prepared and used as support for V2O5 as the catalyst. The catalysts were synthesized by impregnation techniques followed by calcinations and microwave treatment, denoted as V2O5/γ-Al2O3-C and V2O5/γ-Al2O3-MW, respectively. The V2O5 loading was varied on nano-alumina from 5 to 30 wt%. The support and catalysts were characterized by X-ray diffraction (XRD), Barett–Joyner–Halenda (BJH) pore-size distribution, N2-adsorption isotherms, Fourier transform infrared (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and temperature programed desorption (TPD-NH3). The characterization results indicated that V2O5 is highly dispersed on alumina up to 30%-V2O5/γ-Al2O3-MW prepared by MW method. The TPD studies indicated that there are significant differences in acid amount and strength for V2O5/γ-Al2O3-C and V2O5/γ-Al2O3-MW-catalysts. The catalytic activity of the prepared catalysts was evaluated in the temperature range 450–600 °C in relation to the physicochemical properties and surface acidity. The results revealed that optimum catalytic activity and selectivity (∼100%) toward styrene production were obtained using 10% V2O5/γ-Al2O3-MW catalyst treated with microwave. |
| format | Article |
| id | doaj-art-7e0e6ed7ebca47ffb76af3b8a7131e2b |
| institution | Kabale University |
| issn | 1110-0621 |
| language | English |
| publishDate | 2013-12-01 |
| publisher | Egyptian Petroleum Research Institute |
| record_format | Article |
| series | Egyptian Journal of Petroleum |
| spelling | doaj-art-7e0e6ed7ebca47ffb76af3b8a7131e2b2025-08-20T03:35:24ZengEgyptian Petroleum Research InstituteEgyptian Journal of Petroleum1110-06212013-12-0122337338010.1016/j.ejpe.2013.10.007Selective nano alumina supported vanadium oxide catalysts for oxidative dehydrogenation of ethylbenzene to styrene using CO2 as soft oxidantA.M. Elfadly0A.M. Badawi1F.Z. Yehia2Y.A. Mohamed3M.A. Betiha4A.M. Rabie5Egyptian Petroleum Research Institute, Nasr City, Cairo, EgyptEgyptian Petroleum Research Institute, Nasr City, Cairo, EgyptEgyptian Petroleum Research Institute, Nasr City, Cairo, EgyptFaculty of Science Al Azhar University, Nasr City, Cairo, EgyptEgyptian Petroleum Research Institute, Nasr City, Cairo, EgyptEgyptian Petroleum Research Institute, Nasr City, Cairo, EgyptNano alumina-supported V2O5 catalysts with different loadings have been tested for the dehydrogenation of ethylbenzene with CO2 as an oxidant. High surface area nano-alumina was prepared and used as support for V2O5 as the catalyst. The catalysts were synthesized by impregnation techniques followed by calcinations and microwave treatment, denoted as V2O5/γ-Al2O3-C and V2O5/γ-Al2O3-MW, respectively. The V2O5 loading was varied on nano-alumina from 5 to 30 wt%. The support and catalysts were characterized by X-ray diffraction (XRD), Barett–Joyner–Halenda (BJH) pore-size distribution, N2-adsorption isotherms, Fourier transform infrared (FT-IR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and temperature programed desorption (TPD-NH3). The characterization results indicated that V2O5 is highly dispersed on alumina up to 30%-V2O5/γ-Al2O3-MW prepared by MW method. The TPD studies indicated that there are significant differences in acid amount and strength for V2O5/γ-Al2O3-C and V2O5/γ-Al2O3-MW-catalysts. The catalytic activity of the prepared catalysts was evaluated in the temperature range 450–600 °C in relation to the physicochemical properties and surface acidity. The results revealed that optimum catalytic activity and selectivity (∼100%) toward styrene production were obtained using 10% V2O5/γ-Al2O3-MW catalyst treated with microwave.http://www.sciencedirect.com/science/article/pii/S1110062113000767DehydrogenationStyreneCO2γ-Al2O3Catalysis |
| spellingShingle | A.M. Elfadly A.M. Badawi F.Z. Yehia Y.A. Mohamed M.A. Betiha A.M. Rabie Selective nano alumina supported vanadium oxide catalysts for oxidative dehydrogenation of ethylbenzene to styrene using CO2 as soft oxidant Egyptian Journal of Petroleum Dehydrogenation Styrene CO2 γ-Al2O3 Catalysis |
| title | Selective nano alumina supported vanadium oxide catalysts for oxidative dehydrogenation of ethylbenzene to styrene using CO2 as soft oxidant |
| title_full | Selective nano alumina supported vanadium oxide catalysts for oxidative dehydrogenation of ethylbenzene to styrene using CO2 as soft oxidant |
| title_fullStr | Selective nano alumina supported vanadium oxide catalysts for oxidative dehydrogenation of ethylbenzene to styrene using CO2 as soft oxidant |
| title_full_unstemmed | Selective nano alumina supported vanadium oxide catalysts for oxidative dehydrogenation of ethylbenzene to styrene using CO2 as soft oxidant |
| title_short | Selective nano alumina supported vanadium oxide catalysts for oxidative dehydrogenation of ethylbenzene to styrene using CO2 as soft oxidant |
| title_sort | selective nano alumina supported vanadium oxide catalysts for oxidative dehydrogenation of ethylbenzene to styrene using co2 as soft oxidant |
| topic | Dehydrogenation Styrene CO2 γ-Al2O3 Catalysis |
| url | http://www.sciencedirect.com/science/article/pii/S1110062113000767 |
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