Effects of Bi and Ni on the properties of a vanadium phosphorus oxide catalyst
Vanadium phosphorus oxide (VPO) catalysts were synthesized by the dihydrate method which involved the two steps for the preparation of the dihydrate (VOPO4·2H2O) and the precursor hemihydrate (VOHPO4·0.5H2O). Bi and Ni salt were added into the mixture of VOPO4·2H2O and isobutanol, and the obtained p...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2014
|
| Online Access: | http://psasir.upm.edu.my/id/eprint/37338/ http://psasir.upm.edu.my/id/eprint/37338/1/Effects%20of%20Bi%20and%20Ni%20on%20the%20properties%20of%20a%20vanadium%20phosphorus%20oxide%20catalyst.pdf |
| _version_ | 1848848581712150528 |
|---|---|
| author | Yap, Taufiq Yun Hin Yuen, Choon Seon Nawi @ Mohamed, Nurul Suziana Ramli, Irmawati |
| author_facet | Yap, Taufiq Yun Hin Yuen, Choon Seon Nawi @ Mohamed, Nurul Suziana Ramli, Irmawati |
| author_sort | Yap, Taufiq Yun Hin |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Vanadium phosphorus oxide (VPO) catalysts were synthesized by the dihydrate method which involved the two steps for the preparation of the dihydrate (VOPO4·2H2O) and the precursor hemihydrate (VOHPO4·0.5H2O). Bi and Ni salt were added into the mixture of VOPO4·2H2O and isobutanol, and the obtained precursors were calcined in a flow of a n-butane/air mixture to produce the promoted VPO catalysts. The catalysts were characterized by X-ray diffraction (XRD), N2 adsorption-desorption, inductively coupled plasma-atomic emission spectroscopy, scanning electron microscopy (SEM), and H2 temperature-programmed reduction (H2-TPR). Their catalytic properties were tested using a fixed-bed microreactor. All the catalysts gave main XRD peaks at 2θ = 22.9°, 28.5°, and 30.0°, attributing to the (020), (204), and (221) planes of the pyrophosphate phase (VO)2P2O7, respectively. The promoted catalysts have smaller crystallite size and higher specific surface areas. SEM micrographs revealed the formation of more prominent plate-like crystallites that were arranged as rosette clusters. H2-TPR results showed that the promoted catalysts had lower reduction peak temperatures and possessed higher amounts of V5+-O2– and V4+-O– pairs, which gave higher selectivity and activity in the selective oxidation of n-butane to maleic anhydride. |
| first_indexed | 2025-11-15T09:36:47Z |
| format | Article |
| id | upm-37338 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T09:36:47Z |
| publishDate | 2014 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-373382015-10-22T03:45:11Z http://psasir.upm.edu.my/id/eprint/37338/ Effects of Bi and Ni on the properties of a vanadium phosphorus oxide catalyst Yap, Taufiq Yun Hin Yuen, Choon Seon Nawi @ Mohamed, Nurul Suziana Ramli, Irmawati Vanadium phosphorus oxide (VPO) catalysts were synthesized by the dihydrate method which involved the two steps for the preparation of the dihydrate (VOPO4·2H2O) and the precursor hemihydrate (VOHPO4·0.5H2O). Bi and Ni salt were added into the mixture of VOPO4·2H2O and isobutanol, and the obtained precursors were calcined in a flow of a n-butane/air mixture to produce the promoted VPO catalysts. The catalysts were characterized by X-ray diffraction (XRD), N2 adsorption-desorption, inductively coupled plasma-atomic emission spectroscopy, scanning electron microscopy (SEM), and H2 temperature-programmed reduction (H2-TPR). Their catalytic properties were tested using a fixed-bed microreactor. All the catalysts gave main XRD peaks at 2θ = 22.9°, 28.5°, and 30.0°, attributing to the (020), (204), and (221) planes of the pyrophosphate phase (VO)2P2O7, respectively. The promoted catalysts have smaller crystallite size and higher specific surface areas. SEM micrographs revealed the formation of more prominent plate-like crystallites that were arranged as rosette clusters. H2-TPR results showed that the promoted catalysts had lower reduction peak temperatures and possessed higher amounts of V5+-O2– and V4+-O– pairs, which gave higher selectivity and activity in the selective oxidation of n-butane to maleic anhydride. Elsevier 2014-02 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/37338/1/Effects%20of%20Bi%20and%20Ni%20on%20the%20properties%20of%20a%20vanadium%20phosphorus%20oxide%20catalyst.pdf Yap, Taufiq Yun Hin and Yuen, Choon Seon and Nawi @ Mohamed, Nurul Suziana and Ramli, Irmawati (2014) Effects of Bi and Ni on the properties of a vanadium phosphorus oxide catalyst. Chinese Journal of Catalysis, 35 (2). pp. 270-276. ISSN 1872-2067 10.1016/S1872-2067(12)60749-9 |
| spellingShingle | Yap, Taufiq Yun Hin Yuen, Choon Seon Nawi @ Mohamed, Nurul Suziana Ramli, Irmawati Effects of Bi and Ni on the properties of a vanadium phosphorus oxide catalyst |
| title | Effects of Bi and Ni on the properties of a vanadium phosphorus oxide catalyst |
| title_full | Effects of Bi and Ni on the properties of a vanadium phosphorus oxide catalyst |
| title_fullStr | Effects of Bi and Ni on the properties of a vanadium phosphorus oxide catalyst |
| title_full_unstemmed | Effects of Bi and Ni on the properties of a vanadium phosphorus oxide catalyst |
| title_short | Effects of Bi and Ni on the properties of a vanadium phosphorus oxide catalyst |
| title_sort | effects of bi and ni on the properties of a vanadium phosphorus oxide catalyst |
| url | http://psasir.upm.edu.my/id/eprint/37338/ http://psasir.upm.edu.my/id/eprint/37338/ http://psasir.upm.edu.my/id/eprint/37338/1/Effects%20of%20Bi%20and%20Ni%20on%20the%20properties%20of%20a%20vanadium%20phosphorus%20oxide%20catalyst.pdf |