Investigation of the nature of the oxidant (selective and unselective) in/on a vanadyl pyrophosphate catalyst
The anaerobic oxidation of CO by a (VO)2P2O7 catalyst has been used to investigate the nature of the oxidant (selective and unselective) in/on that material. Three peaks were observed in the rate of production of CO2 - at 993, 1073 and 1093 K. The temperature of the maximum in the rate of production...
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| Format: | Article |
| Language: | English English |
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Springer
2006
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| Online Access: | http://psasir.upm.edu.my/id/eprint/7880/ http://psasir.upm.edu.my/id/eprint/7880/1/Investigation%20of%20the%20nature%20of%20the%20oxidant.pdf |
| _version_ | 1848840717602914304 |
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| author | Yap, Taufiq Yun Hin Sakakini, Bahij H. Waugh, Kenneth C. |
| author_facet | Yap, Taufiq Yun Hin Sakakini, Bahij H. Waugh, Kenneth C. |
| author_sort | Yap, Taufiq Yun Hin |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | The anaerobic oxidation of CO by a (VO)2P2O7 catalyst has been used to investigate the nature of the oxidant (selective and unselective) in/on that material. Three peaks were observed in the rate of production of CO2 - at 993, 1073 and 1093 K. The temperature of the maximum in the rate of production of the first CO2 peak and the amount of oxygen associated with it are the same as that observed in the selective anaerobic oxidation of n-butane to butene and butadiene, but-1-ene to butadiene and furan and but-1,3-diene to dihydrofuran, furan and maleic anhydride. The interaction of CO with the (VO)2P2O7 catalyst forming CO2 at 993 K is therefore concluded to be with the selective oxygen. The total amount of oxygen removed by the CO from the (VO)2P2O7 lattice (>5 monolayers) is about six times greater than that of the selective oxygen. The higher activation energies for the removal of the unselective oxygen accounts for the high selectivities (~80%) encountered commercially for the anaerobic oxidation of n-butane to maleic anhydride. Re-oxidation of the CO reduced (VO)2P2O7 by N2O quantitatively replaces all of the lattice oxygen removed by the formation of CO2, but does not restore the original morphology. |
| first_indexed | 2025-11-15T07:31:47Z |
| format | Article |
| id | upm-7880 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T07:31:47Z |
| publishDate | 2006 |
| publisher | Springer |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-78802015-11-11T03:41:26Z http://psasir.upm.edu.my/id/eprint/7880/ Investigation of the nature of the oxidant (selective and unselective) in/on a vanadyl pyrophosphate catalyst Yap, Taufiq Yun Hin Sakakini, Bahij H. Waugh, Kenneth C. The anaerobic oxidation of CO by a (VO)2P2O7 catalyst has been used to investigate the nature of the oxidant (selective and unselective) in/on that material. Three peaks were observed in the rate of production of CO2 - at 993, 1073 and 1093 K. The temperature of the maximum in the rate of production of the first CO2 peak and the amount of oxygen associated with it are the same as that observed in the selective anaerobic oxidation of n-butane to butene and butadiene, but-1-ene to butadiene and furan and but-1,3-diene to dihydrofuran, furan and maleic anhydride. The interaction of CO with the (VO)2P2O7 catalyst forming CO2 at 993 K is therefore concluded to be with the selective oxygen. The total amount of oxygen removed by the CO from the (VO)2P2O7 lattice (>5 monolayers) is about six times greater than that of the selective oxygen. The higher activation energies for the removal of the unselective oxygen accounts for the high selectivities (~80%) encountered commercially for the anaerobic oxidation of n-butane to maleic anhydride. Re-oxidation of the CO reduced (VO)2P2O7 by N2O quantitatively replaces all of the lattice oxygen removed by the formation of CO2, but does not restore the original morphology. Springer 2006 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/7880/1/Investigation%20of%20the%20nature%20of%20the%20oxidant.pdf Yap, Taufiq Yun Hin and Sakakini, Bahij H. and Waugh, Kenneth C. (2006) Investigation of the nature of the oxidant (selective and unselective) in/on a vanadyl pyrophosphate catalyst. Chemistry and Materials Science, 48 (1-2). pp. 105-110. ISSN 1011-372X http://dx.doi.org/10.1023/A:1019098230807 10.1023/A:1019098230807 English |
| spellingShingle | Yap, Taufiq Yun Hin Sakakini, Bahij H. Waugh, Kenneth C. Investigation of the nature of the oxidant (selective and unselective) in/on a vanadyl pyrophosphate catalyst |
| title | Investigation of the nature of the oxidant (selective and unselective) in/on a vanadyl pyrophosphate catalyst |
| title_full | Investigation of the nature of the oxidant (selective and unselective) in/on a vanadyl pyrophosphate catalyst |
| title_fullStr | Investigation of the nature of the oxidant (selective and unselective) in/on a vanadyl pyrophosphate catalyst |
| title_full_unstemmed | Investigation of the nature of the oxidant (selective and unselective) in/on a vanadyl pyrophosphate catalyst |
| title_short | Investigation of the nature of the oxidant (selective and unselective) in/on a vanadyl pyrophosphate catalyst |
| title_sort | investigation of the nature of the oxidant (selective and unselective) in/on a vanadyl pyrophosphate catalyst |
| url | http://psasir.upm.edu.my/id/eprint/7880/ http://psasir.upm.edu.my/id/eprint/7880/ http://psasir.upm.edu.my/id/eprint/7880/ http://psasir.upm.edu.my/id/eprint/7880/1/Investigation%20of%20the%20nature%20of%20the%20oxidant.pdf |