Bismuth-modified vanadyl pyrophosphate catalysts
Vanadium phosphorous oxide (VPO) is the commercial catalyst for the selective oxidation of butane to maleic anhydride. A 1% bismuth-doped VPO catalyst was prepared by refluxing Bi(NO3)3 and VOPO4·2H2O in isobutanol (denoted as VPD). Bismuth incorporation into the VPO lattice lowered the overall V ox...
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| Format: | Article |
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Springer
2003
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| Online Access: | http://psasir.upm.edu.my/id/eprint/113048/ |
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| author | Taufiq-Yap, Y.H. Tan, K.P. Waugh, K.C. Hussein, M.Z. Ramli, I. Abdul Rahman, M.B. |
| author_facet | Taufiq-Yap, Y.H. Tan, K.P. Waugh, K.C. Hussein, M.Z. Ramli, I. Abdul Rahman, M.B. |
| author_sort | Taufiq-Yap, Y.H. |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Vanadium phosphorous oxide (VPO) is the commercial catalyst for the selective oxidation of butane to maleic anhydride. A 1% bismuth-doped VPO catalyst was prepared by refluxing Bi(NO3)3 and VOPO4·2H2O in isobutanol (denoted as VPD). Bismuth incorporation into the VPO lattice lowered the overall V oxidation state from 4.24 to 4.08. It lowered the peak maximum temperature for the desorption of oxygen from the lattice from 100.1 K (undoped) to 964 K with a shoulder at 912 K and the peak maxima for H2 TPR from 863, 1011, and 1143 K (undoped) to 798, 906, and 1151 K. The total oxygen desorbed from the Bi-doped catalyst was only one-fourth that of the undoped catalyst, while the amount of oxygen removed by TPR was roughly the same for both catalysts. In anaerobic oxidation, the Bi-doped catalyst had roughly the same activity as in undoped catalyst in C4 hydrocarbon oxidation but had a higher selectivity to products such as olefins and maleic anhydride. The undoped VPD catalyst showed a rosette-type structure with a crystallite of uniform size. However, Bi-doped catalyst exhibited more layered platelike crystals, which form at the surface of clusters. |
| first_indexed | 2025-11-15T14:15:24Z |
| format | Article |
| id | upm-113048 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T14:15:24Z |
| publishDate | 2003 |
| publisher | Springer |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1130482025-01-13T04:06:23Z http://psasir.upm.edu.my/id/eprint/113048/ Bismuth-modified vanadyl pyrophosphate catalysts Taufiq-Yap, Y.H. Tan, K.P. Waugh, K.C. Hussein, M.Z. Ramli, I. Abdul Rahman, M.B. Vanadium phosphorous oxide (VPO) is the commercial catalyst for the selective oxidation of butane to maleic anhydride. A 1% bismuth-doped VPO catalyst was prepared by refluxing Bi(NO3)3 and VOPO4·2H2O in isobutanol (denoted as VPD). Bismuth incorporation into the VPO lattice lowered the overall V oxidation state from 4.24 to 4.08. It lowered the peak maximum temperature for the desorption of oxygen from the lattice from 100.1 K (undoped) to 964 K with a shoulder at 912 K and the peak maxima for H2 TPR from 863, 1011, and 1143 K (undoped) to 798, 906, and 1151 K. The total oxygen desorbed from the Bi-doped catalyst was only one-fourth that of the undoped catalyst, while the amount of oxygen removed by TPR was roughly the same for both catalysts. In anaerobic oxidation, the Bi-doped catalyst had roughly the same activity as in undoped catalyst in C4 hydrocarbon oxidation but had a higher selectivity to products such as olefins and maleic anhydride. The undoped VPD catalyst showed a rosette-type structure with a crystallite of uniform size. However, Bi-doped catalyst exhibited more layered platelike crystals, which form at the surface of clusters. Springer 2003 Article PeerReviewed Taufiq-Yap, Y.H. and Tan, K.P. and Waugh, K.C. and Hussein, M.Z. and Ramli, I. and Abdul Rahman, M.B. (2003) Bismuth-modified vanadyl pyrophosphate catalysts. Catalysis Letters, 89 (1/2). pp. 87-93. ISSN 1011-372X; eISSN: 1572-879X https://link.springer.com/article/10.1023/A:1024775611157?error=cookies_not_supported&code=86786205-a7a7-49d5-97a5-f6545bf05137 10.1023/a:1024775611157 |
| spellingShingle | Taufiq-Yap, Y.H. Tan, K.P. Waugh, K.C. Hussein, M.Z. Ramli, I. Abdul Rahman, M.B. Bismuth-modified vanadyl pyrophosphate catalysts |
| title | Bismuth-modified vanadyl pyrophosphate catalysts |
| title_full | Bismuth-modified vanadyl pyrophosphate catalysts |
| title_fullStr | Bismuth-modified vanadyl pyrophosphate catalysts |
| title_full_unstemmed | Bismuth-modified vanadyl pyrophosphate catalysts |
| title_short | Bismuth-modified vanadyl pyrophosphate catalysts |
| title_sort | bismuth-modified vanadyl pyrophosphate catalysts |
| url | http://psasir.upm.edu.my/id/eprint/113048/ http://psasir.upm.edu.my/id/eprint/113048/ http://psasir.upm.edu.my/id/eprint/113048/ |