Effect of Cr and Co promoters addition on vanadium phosphate catalysts for mild oxidation of n-butane
In this study, Cr and Co promoted, as well as unpromoted vanadium phosphate (VPO) catalysts were synthesized by the reaction of V2O5 and o-H3PO4 in organic medium followed by calcination in n-butane/air environment at 673 K. The physico-chemical properties and the catalytic behavior were affected b...
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| Format: | Article |
| Language: | English |
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Elsevier
2006
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| Online Access: | http://psasir.upm.edu.my/id/eprint/7918/1/Effect%20of%20Cr%20and%20Co%20promoters%20addition%20on%20vanadium%20phosphate%20catalysts%20for%20mild%20oxidation%20of%20n.pdf |
| _version_ | 1796967423866306560 |
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| author | Yap, Taufiq Yun Hin |
| author_facet | Yap, Taufiq Yun Hin |
| author_sort | Yap, Taufiq Yun Hin |
| collection | UPM |
| description | In this study, Cr and Co promoted, as well as unpromoted vanadium phosphate (VPO) catalysts were synthesized by the reaction of V2O5 and o-H3PO4 in organic medium followed by calcination in n-butane/air environment at 673 K. The physico-chemical properties and the catalytic behavior were affected by the addition of Cr and Co dopants. H2-TPR was used to investigate the nature of oxidants in the unpromoted and promoted catalysts. The results showed that both the Cr and Co promoters remarkably lowered the temperature of the reduction peak associated with V5+. The amount of oxygen species originated from the active phase, V4+, removed was significantly increased for Co and Cr-promoted catalysts. Both Cr and Co dopants improve strongly the n-butane conversion without sacrificing the MA selectivity. A good correlation was observed between the amount of oxygen species removed from V4+ phase and the activity for n-butane oxidation to maleic anhydride. This suggested that V4+-O was the center for the activation of n-butane. |
| first_indexed | 2024-03-06T07:13:39Z |
| format | Article |
| id | upm.eprints-7918 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T07:13:39Z |
| publishDate | 2006 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | upm.eprints-79182016-11-25T07:50:47Z http://psasir.upm.edu.my/id/eprint/7918/ Effect of Cr and Co promoters addition on vanadium phosphate catalysts for mild oxidation of n-butane Yap, Taufiq Yun Hin In this study, Cr and Co promoted, as well as unpromoted vanadium phosphate (VPO) catalysts were synthesized by the reaction of V2O5 and o-H3PO4 in organic medium followed by calcination in n-butane/air environment at 673 K. The physico-chemical properties and the catalytic behavior were affected by the addition of Cr and Co dopants. H2-TPR was used to investigate the nature of oxidants in the unpromoted and promoted catalysts. The results showed that both the Cr and Co promoters remarkably lowered the temperature of the reduction peak associated with V5+. The amount of oxygen species originated from the active phase, V4+, removed was significantly increased for Co and Cr-promoted catalysts. Both Cr and Co dopants improve strongly the n-butane conversion without sacrificing the MA selectivity. A good correlation was observed between the amount of oxygen species removed from V4+ phase and the activity for n-butane oxidation to maleic anhydride. This suggested that V4+-O was the center for the activation of n-butane. Elsevier 2006-06 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/7918/1/Effect%20of%20Cr%20and%20Co%20promoters%20addition%20on%20vanadium%20phosphate%20catalysts%20for%20mild%20oxidation%20of%20n.pdf Yap, Taufiq Yun Hin (2006) Effect of Cr and Co promoters addition on vanadium phosphate catalysts for mild oxidation of n-butane. Journal of Natural Gas Chemistry, 15 (2). pp. 144-148. ISSN 1003-9953 http://dx.doi.org/10.1016/S1003-9953(06)60021-2 10.1016/S1003-9953(06)60021-2 |
| spellingShingle | Yap, Taufiq Yun Hin Effect of Cr and Co promoters addition on vanadium phosphate catalysts for mild oxidation of n-butane |
| title | Effect of Cr and Co promoters addition on vanadium phosphate catalysts for mild oxidation of n-butane |
| title_full | Effect of Cr and Co promoters addition on vanadium phosphate catalysts for mild oxidation of n-butane |
| title_fullStr | Effect of Cr and Co promoters addition on vanadium phosphate catalysts for mild oxidation of n-butane |
| title_full_unstemmed | Effect of Cr and Co promoters addition on vanadium phosphate catalysts for mild oxidation of n-butane |
| title_short | Effect of Cr and Co promoters addition on vanadium phosphate catalysts for mild oxidation of n-butane |
| title_sort | effect of cr and co promoters addition on vanadium phosphate catalysts for mild oxidation of n butane |
| url | http://psasir.upm.edu.my/id/eprint/7918/1/Effect%20of%20Cr%20and%20Co%20promoters%20addition%20on%20vanadium%20phosphate%20catalysts%20for%20mild%20oxidation%20of%20n.pdf |
| work_keys_str_mv | AT yaptaufiqyunhin effectofcrandcopromotersadditiononvanadiumphosphatecatalystsformildoxidationofnbutane |