Effect of tellurium promoter on vanadium phosphate catalyst for partial oxidation of n-butane
Te-promoted (1%) vanadium phosphate catalyst (VPDTe) was prepared via VOPO4·2H2O by calcining its precursor VOHPO4·0.5H2O in a flow of n-butane/air. VPDTe catalyst has resulted a higher existence of V5+ phase with V5+/V4+ ratio of 0.23. SEM micrographs show that Te addition altered the arrangement o...
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| Format: | Article |
| Language: | English |
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Elsevier
2011
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| Online Access: | http://psasir.upm.edu.my/id/eprint/25121/ http://psasir.upm.edu.my/id/eprint/25121/1/Effect%20of%20tellurium%20promoter%20on%20vanadium%20phosphate%20catalyst%20for%20partial%20oxidation%20of%20n.pdf |
| _version_ | 1848845222445842432 |
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| author | Yap, Taufiq Yun Hin Sairi, Nor Asrina Hutchings, Graham John Dummer, Nicholas F. Bartley, Jonathan K. |
| author_facet | Yap, Taufiq Yun Hin Sairi, Nor Asrina Hutchings, Graham John Dummer, Nicholas F. Bartley, Jonathan K. |
| author_sort | Yap, Taufiq Yun Hin |
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| collection | Online Access |
| description | Te-promoted (1%) vanadium phosphate catalyst (VPDTe) was prepared via VOPO4·2H2O by calcining its precursor VOHPO4·0.5H2O in a flow of n-butane/air. VPDTe catalyst has resulted a higher existence of V5+ phase with V5+/V4+ ratio of 0.23. SEM micrographs show that Te addition altered the arrangement of the platelets from “rose-like” clusters to layer with irregular shape. Te addition has also markedly
lowered the reduction activation energies of the vanadium phosphate catalyst as revealed by TPR profile. The amount of active oxygen species associated with V4+ phase of the Te promoted catalyst was significantly higher than those of the unpromoted catalyst. These observations suggest that high mobility and availability of reactive oxygen species contributed to the enhancement of n-butane conversion up to 80% at 673 K, while only 47% over unpromoted catalyst (2400 h−1, 1.7%n-butane in air). |
| first_indexed | 2025-11-15T08:43:23Z |
| format | Article |
| id | upm-25121 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T08:43:23Z |
| publishDate | 2011 |
| publisher | Elsevier |
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| spelling | upm-251212016-11-25T04:44:45Z http://psasir.upm.edu.my/id/eprint/25121/ Effect of tellurium promoter on vanadium phosphate catalyst for partial oxidation of n-butane Yap, Taufiq Yun Hin Sairi, Nor Asrina Hutchings, Graham John Dummer, Nicholas F. Bartley, Jonathan K. Te-promoted (1%) vanadium phosphate catalyst (VPDTe) was prepared via VOPO4·2H2O by calcining its precursor VOHPO4·0.5H2O in a flow of n-butane/air. VPDTe catalyst has resulted a higher existence of V5+ phase with V5+/V4+ ratio of 0.23. SEM micrographs show that Te addition altered the arrangement of the platelets from “rose-like” clusters to layer with irregular shape. Te addition has also markedly lowered the reduction activation energies of the vanadium phosphate catalyst as revealed by TPR profile. The amount of active oxygen species associated with V4+ phase of the Te promoted catalyst was significantly higher than those of the unpromoted catalyst. These observations suggest that high mobility and availability of reactive oxygen species contributed to the enhancement of n-butane conversion up to 80% at 673 K, while only 47% over unpromoted catalyst (2400 h−1, 1.7%n-butane in air). Elsevier 2011 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/25121/1/Effect%20of%20tellurium%20promoter%20on%20vanadium%20phosphate%20catalyst%20for%20partial%20oxidation%20of%20n.pdf Yap, Taufiq Yun Hin and Sairi, Nor Asrina and Hutchings, Graham John and Dummer, Nicholas F. and Bartley, Jonathan K. (2011) Effect of tellurium promoter on vanadium phosphate catalyst for partial oxidation of n-butane. Journal of Natural Gas Chemistry, 20 (6). pp. 635-638. ISSN 1003-9953 http://www.sciencedirect.com/science/article/pii/S1003995310602514 10.1016/S1003-9953(10)60251-4 |
| spellingShingle | Yap, Taufiq Yun Hin Sairi, Nor Asrina Hutchings, Graham John Dummer, Nicholas F. Bartley, Jonathan K. Effect of tellurium promoter on vanadium phosphate catalyst for partial oxidation of n-butane |
| title | Effect of tellurium promoter on vanadium phosphate catalyst for partial oxidation of n-butane |
| title_full | Effect of tellurium promoter on vanadium phosphate catalyst for partial oxidation of n-butane |
| title_fullStr | Effect of tellurium promoter on vanadium phosphate catalyst for partial oxidation of n-butane |
| title_full_unstemmed | Effect of tellurium promoter on vanadium phosphate catalyst for partial oxidation of n-butane |
| title_short | Effect of tellurium promoter on vanadium phosphate catalyst for partial oxidation of n-butane |
| title_sort | effect of tellurium promoter on vanadium phosphate catalyst for partial oxidation of n-butane |
| url | http://psasir.upm.edu.my/id/eprint/25121/ http://psasir.upm.edu.my/id/eprint/25121/ http://psasir.upm.edu.my/id/eprint/25121/ http://psasir.upm.edu.my/id/eprint/25121/1/Effect%20of%20tellurium%20promoter%20on%20vanadium%20phosphate%20catalyst%20for%20partial%20oxidation%20of%20n.pdf |