Mechanochemical-treated Cr-promoted vanadyl pyrophosphate catalyst for n-butane oxidation to maleic anhydride
Cr-promoted vanadium phosphate (VPO) catalyst was synthesized by mechanotreating VOHPO4·0.5H2O in cyclohexane for 2 hr using a high energy planetary ball miller followed by calcination in a flow of n-butane/air mixture at 673 K. The physico-chemical properties of the sample were investigated by seve...
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| Format: | Article |
| Language: | English |
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Taylor & Francis
2008
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| Online Access: | http://psasir.upm.edu.my/id/eprint/6184/ http://psasir.upm.edu.my/id/eprint/6184/1/Mechanochemical-treated%20Cr-promoted%20Vanadyl%20Pyrophosphate%20Catalyst%20for%20n-Butane%20Oxidation%20to%20Maleic%20Anhydride.pdf |
| _version_ | 1848840307503792128 |
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| author | Yap, Taufiq Yun Hin Yeoh, M. M. |
| author_facet | Yap, Taufiq Yun Hin Yeoh, M. M. |
| author_sort | Yap, Taufiq Yun Hin |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Cr-promoted vanadium phosphate (VPO) catalyst was synthesized by mechanotreating VOHPO4·0.5H2O in cyclohexane for 2 hr using a high energy planetary ball miller followed by calcination in a flow of n-butane/air mixture at 673 K. The physico-chemical properties of the sample were investigated by several characterization techniques such as BET, XRD, redox titration, SEM, and TPR. The data were compared to the unmilled material. BET surface area measurement of the milled catalyst showed that it possesses higher surface area (13.2 m2 g−1) compared to the unmilled catalyst (6.4 m2 g−1). Milling also caused a slight increment in the average oxidation state of vanadium as well as the percentage of V5+ oxidation state. XRD pattern of the milled material revealed that the major diffraction peaks were broadened thus indicating a reduction of particle size. SEM micrographs showed the lost in the blossom morphology and the formation of layer packages, with more circular particles in the milled catalyst. The amount of active lattice oxygen species being removed from V4+-O− pairs increased significantly for mechanochemical treated Cr-doped VPO catalyst leads to the enhancement of the catalytic activity for n-butane oxidation to maleic anhydride. |
| first_indexed | 2025-11-15T07:25:16Z |
| format | Article |
| id | upm-6184 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T07:25:16Z |
| publishDate | 2008 |
| publisher | Taylor & Francis |
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| spelling | upm-61842016-11-25T02:34:32Z http://psasir.upm.edu.my/id/eprint/6184/ Mechanochemical-treated Cr-promoted vanadyl pyrophosphate catalyst for n-butane oxidation to maleic anhydride Yap, Taufiq Yun Hin Yeoh, M. M. Cr-promoted vanadium phosphate (VPO) catalyst was synthesized by mechanotreating VOHPO4·0.5H2O in cyclohexane for 2 hr using a high energy planetary ball miller followed by calcination in a flow of n-butane/air mixture at 673 K. The physico-chemical properties of the sample were investigated by several characterization techniques such as BET, XRD, redox titration, SEM, and TPR. The data were compared to the unmilled material. BET surface area measurement of the milled catalyst showed that it possesses higher surface area (13.2 m2 g−1) compared to the unmilled catalyst (6.4 m2 g−1). Milling also caused a slight increment in the average oxidation state of vanadium as well as the percentage of V5+ oxidation state. XRD pattern of the milled material revealed that the major diffraction peaks were broadened thus indicating a reduction of particle size. SEM micrographs showed the lost in the blossom morphology and the formation of layer packages, with more circular particles in the milled catalyst. The amount of active lattice oxygen species being removed from V4+-O− pairs increased significantly for mechanochemical treated Cr-doped VPO catalyst leads to the enhancement of the catalytic activity for n-butane oxidation to maleic anhydride. Taylor & Francis 2008 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/6184/1/Mechanochemical-treated%20Cr-promoted%20Vanadyl%20Pyrophosphate%20Catalyst%20for%20n-Butane%20Oxidation%20to%20Maleic%20Anhydride.pdf Yap, Taufiq Yun Hin and Yeoh, M. M. (2008) Mechanochemical-treated Cr-promoted vanadyl pyrophosphate catalyst for n-butane oxidation to maleic anhydride. Petroleum Science and Technology, 26 (6). pp. 734-741. ISSN 1091-6466; ESSN: 1532-2459 http://dx.doi.org/10.1080/10916460701205245 10.1080/10916460701205245 |
| spellingShingle | Yap, Taufiq Yun Hin Yeoh, M. M. Mechanochemical-treated Cr-promoted vanadyl pyrophosphate catalyst for n-butane oxidation to maleic anhydride |
| title | Mechanochemical-treated Cr-promoted vanadyl pyrophosphate catalyst for n-butane oxidation to maleic anhydride |
| title_full | Mechanochemical-treated Cr-promoted vanadyl pyrophosphate catalyst for n-butane oxidation to maleic anhydride |
| title_fullStr | Mechanochemical-treated Cr-promoted vanadyl pyrophosphate catalyst for n-butane oxidation to maleic anhydride |
| title_full_unstemmed | Mechanochemical-treated Cr-promoted vanadyl pyrophosphate catalyst for n-butane oxidation to maleic anhydride |
| title_short | Mechanochemical-treated Cr-promoted vanadyl pyrophosphate catalyst for n-butane oxidation to maleic anhydride |
| title_sort | mechanochemical-treated cr-promoted vanadyl pyrophosphate catalyst for n-butane oxidation to maleic anhydride |
| url | http://psasir.upm.edu.my/id/eprint/6184/ http://psasir.upm.edu.my/id/eprint/6184/ http://psasir.upm.edu.my/id/eprint/6184/ http://psasir.upm.edu.my/id/eprint/6184/1/Mechanochemical-treated%20Cr-promoted%20Vanadyl%20Pyrophosphate%20Catalyst%20for%20n-Butane%20Oxidation%20to%20Maleic%20Anhydride.pdf |