The effect of Bi promoter on vanadium phosphate catalysts synthesized via sesquihydrate route
A series of 1%, 3% and 5% Bi-doped vanadyl pyrophosphate catalysts were prepared via sesquihydrate route (VPOs method). These catalysts were denoted as VPOs-Bi1%, VPOs-Bi3% and VPOs-Bi5%. Bulk and Bi-promoted vanadyl pyrophosphate catalysts prepared via sesquihydrate route exhibited a well-crystalli...
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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/24626/1/The%20effect%20of%20Bi%20promoter%20on%20vanadium%20phosphate%20catalysts%20synthesized%20via%20sesquihydrate%20route.pdf |
| _version_ | 1825925609408167936 |
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| author | Leong, Loong Kong Chin, K. S. Yap, Taufiq Yun Hin |
| author_facet | Leong, Loong Kong Chin, K. S. Yap, Taufiq Yun Hin |
| author_sort | Leong, Loong Kong |
| collection | UPM |
| description | A series of 1%, 3% and 5% Bi-doped vanadyl pyrophosphate catalysts were prepared via sesquihydrate route (VPOs method). These catalysts were denoted as VPOs-Bi1%, VPOs-Bi3% and VPOs-Bi5%. Bulk and Bi-promoted vanadyl pyrophosphate catalysts prepared via sesquihydrate route exhibited a well-crystallized (VO)2P2O7 phase. Two V5+ phases, i.e. β-VOPO4 and αII-VOPO4 were observed in all Bi-promoted VPO catalysts, which led to an increase in the specific surface area and average oxidation state of vanadium. Bi-promoted VPO catalysts showed six to nine times higher amounts of oxygen evolved than the bulk VPO catalyst in oxygen TPD and a significant shift in the reduction peaks to lower temperatures. Catalytic tests revealed that both activity and selectivity to maleic anhydride increased with the presence of bismuth promoter. |
| first_indexed | 2024-03-06T08:00:24Z |
| format | Article |
| id | upm.eprints-24626 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T08:00:24Z |
| publishDate | 2011 |
| publisher | Elsevier |
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| spelling | upm.eprints-246262016-11-28T09:24:57Z http://psasir.upm.edu.my/id/eprint/24626/ The effect of Bi promoter on vanadium phosphate catalysts synthesized via sesquihydrate route Leong, Loong Kong Chin, K. S. Yap, Taufiq Yun Hin A series of 1%, 3% and 5% Bi-doped vanadyl pyrophosphate catalysts were prepared via sesquihydrate route (VPOs method). These catalysts were denoted as VPOs-Bi1%, VPOs-Bi3% and VPOs-Bi5%. Bulk and Bi-promoted vanadyl pyrophosphate catalysts prepared via sesquihydrate route exhibited a well-crystallized (VO)2P2O7 phase. Two V5+ phases, i.e. β-VOPO4 and αII-VOPO4 were observed in all Bi-promoted VPO catalysts, which led to an increase in the specific surface area and average oxidation state of vanadium. Bi-promoted VPO catalysts showed six to nine times higher amounts of oxygen evolved than the bulk VPO catalyst in oxygen TPD and a significant shift in the reduction peaks to lower temperatures. Catalytic tests revealed that both activity and selectivity to maleic anhydride increased with the presence of bismuth promoter. Elsevier 2011-04-30 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/24626/1/The%20effect%20of%20Bi%20promoter%20on%20vanadium%20phosphate%20catalysts%20synthesized%20via%20sesquihydrate%20route.pdf Leong, Loong Kong and Chin, K. S. and Yap, Taufiq Yun Hin (2011) The effect of Bi promoter on vanadium phosphate catalysts synthesized via sesquihydrate route. Catalysis Today, 164 (1). pp. 341-346. ISSN 0920-5861 http://www.sciencedirect.com/science/article/pii/S0920586110006309 10.1016/j.cattod.2010.10.029 |
| spellingShingle | Leong, Loong Kong Chin, K. S. Yap, Taufiq Yun Hin The effect of Bi promoter on vanadium phosphate catalysts synthesized via sesquihydrate route |
| title | The effect of Bi promoter on vanadium phosphate catalysts synthesized via sesquihydrate route |
| title_full | The effect of Bi promoter on vanadium phosphate catalysts synthesized via sesquihydrate route |
| title_fullStr | The effect of Bi promoter on vanadium phosphate catalysts synthesized via sesquihydrate route |
| title_full_unstemmed | The effect of Bi promoter on vanadium phosphate catalysts synthesized via sesquihydrate route |
| title_short | The effect of Bi promoter on vanadium phosphate catalysts synthesized via sesquihydrate route |
| title_sort | effect of bi promoter on vanadium phosphate catalysts synthesized via sesquihydrate route |
| url | http://psasir.upm.edu.my/id/eprint/24626/1/The%20effect%20of%20Bi%20promoter%20on%20vanadium%20phosphate%20catalysts%20synthesized%20via%20sesquihydrate%20route.pdf |
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