Direct Benzyl Alcohol and Benzaldehyde Synthesis from Toluene over Keggin-Type Polyoxometalates Catalysts: Kinetic and Mechanistic Studies
The catalytic activity of various Keggin polyoxometalate catalysts has been investigated in the gas-phase partial oxidation of toluene to produce benzyl alcohol and benzaldehyde. The catalyst systems HPMo12O40, HPMo11VO40, FePMo12O40, and PMo11FeO39 were prepared and characterized by FT-IR, UV-visib...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2019/9521529 |
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| author | Allam Djaouida Mansouri Sadia Hocine Smaïn |
| author_facet | Allam Djaouida Mansouri Sadia Hocine Smaïn |
| author_sort | Allam Djaouida |
| collection | DOAJ |
| description | The catalytic activity of various Keggin polyoxometalate catalysts has been investigated in the gas-phase partial oxidation of toluene to produce benzyl alcohol and benzaldehyde. The catalyst systems HPMo12O40, HPMo11VO40, FePMo12O40, and PMo11FeO39 were prepared and characterized by FT-IR, UV-visible, SEM, XRD, TGA, and cyclic voltammetry. The acid/base properties were evaluated using the decomposition of isopropanol. Catalytic studies were carried under atmospheric pressure and over the temperature range 200°C–350°C, using carbon dioxide as a mild oxidant. Toluene conversion and product distribution depend mainly on the catalyst composition and operating conditions. In addition to benzaldehyde, benzyl alcohol is obtained with a high selectivity on the PMo11FeO39 catalyst. The kinetic data show that the reoxidation of the reduced catalyst is the rate-limiting step for the partial oxidation reaction of toluene. |
| format | Article |
| id | doaj-art-6565e2cfb4bc41ebb28ae5d415a3c2aa |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-6565e2cfb4bc41ebb28ae5d415a3c2aa2025-08-20T03:34:33ZengWileyJournal of Chemistry2090-90632090-90712019-01-01201910.1155/2019/95215299521529Direct Benzyl Alcohol and Benzaldehyde Synthesis from Toluene over Keggin-Type Polyoxometalates Catalysts: Kinetic and Mechanistic StudiesAllam Djaouida0Mansouri Sadia1Hocine Smaïn2Laboratoire de Génie Chimique et Chimie Appliquée Hasnaoua I, Université de Mouloud Mammeri, BP. 17 RP 15000 Tizi-Ouzou, AlgeriaLaboratoire de Génie Chimique et Chimie Appliquée Hasnaoua I, Université de Mouloud Mammeri, BP. 17 RP 15000 Tizi-Ouzou, AlgeriaLaboratoire de Génie Chimique et Chimie Appliquée Hasnaoua I, Université de Mouloud Mammeri, BP. 17 RP 15000 Tizi-Ouzou, AlgeriaThe catalytic activity of various Keggin polyoxometalate catalysts has been investigated in the gas-phase partial oxidation of toluene to produce benzyl alcohol and benzaldehyde. The catalyst systems HPMo12O40, HPMo11VO40, FePMo12O40, and PMo11FeO39 were prepared and characterized by FT-IR, UV-visible, SEM, XRD, TGA, and cyclic voltammetry. The acid/base properties were evaluated using the decomposition of isopropanol. Catalytic studies were carried under atmospheric pressure and over the temperature range 200°C–350°C, using carbon dioxide as a mild oxidant. Toluene conversion and product distribution depend mainly on the catalyst composition and operating conditions. In addition to benzaldehyde, benzyl alcohol is obtained with a high selectivity on the PMo11FeO39 catalyst. The kinetic data show that the reoxidation of the reduced catalyst is the rate-limiting step for the partial oxidation reaction of toluene.http://dx.doi.org/10.1155/2019/9521529 |
| spellingShingle | Allam Djaouida Mansouri Sadia Hocine Smaïn Direct Benzyl Alcohol and Benzaldehyde Synthesis from Toluene over Keggin-Type Polyoxometalates Catalysts: Kinetic and Mechanistic Studies Journal of Chemistry |
| title | Direct Benzyl Alcohol and Benzaldehyde Synthesis from Toluene over Keggin-Type Polyoxometalates Catalysts: Kinetic and Mechanistic Studies |
| title_full | Direct Benzyl Alcohol and Benzaldehyde Synthesis from Toluene over Keggin-Type Polyoxometalates Catalysts: Kinetic and Mechanistic Studies |
| title_fullStr | Direct Benzyl Alcohol and Benzaldehyde Synthesis from Toluene over Keggin-Type Polyoxometalates Catalysts: Kinetic and Mechanistic Studies |
| title_full_unstemmed | Direct Benzyl Alcohol and Benzaldehyde Synthesis from Toluene over Keggin-Type Polyoxometalates Catalysts: Kinetic and Mechanistic Studies |
| title_short | Direct Benzyl Alcohol and Benzaldehyde Synthesis from Toluene over Keggin-Type Polyoxometalates Catalysts: Kinetic and Mechanistic Studies |
| title_sort | direct benzyl alcohol and benzaldehyde synthesis from toluene over keggin type polyoxometalates catalysts kinetic and mechanistic studies |
| url | http://dx.doi.org/10.1155/2019/9521529 |
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