Abstract
The use of an aerosol process to prepare vanadium phosphorus oxide (VPO) catalysts for butane oxidation to maleic anhydride was investigated. Heating an aerosol created with air of an aqueous solution of NH4VO3 and H3PO4 with phosphorus to vanadium atomic ratio P/V = 1.2 at 700°C resulted in a material that had an average vanadium oxidation state of 4.7-5.0. After activation in a butane and oxygen mixture, a stable catalyst was obtained which showed selectivities to maleic anhydride (MA) of up to 48% at 475°C. X-ray diffraction and laser Raman spectroscopic characterization of the catalyst showed that the as-prepared sample was mostly VOPO4·2H2O, which was converted to αI-VOPO4 under reaction conditions. The catalyst was much more active than a VPO catalyst with P/V = 1.1 or 1.2 prepared by the conventional method in an aqueous medium. Thus, in spite of its lower surface area and selectivity for MA, it produced a higher yield of MA even on the basis of the weight of catalyst.
| Original language | English |
|---|---|
| Pages (from-to) | 1994-2000 |
| Number of pages | 7 |
| Journal | Industrial and Engineering Chemistry Research |
| Volume | 34 |
| Issue number | 6 |
| Publication status | Published - 1995 |
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ASJC Scopus subject areas
- Polymers and Plastics
- Environmental Science(all)
- Chemical Engineering (miscellaneous)
Cite this
Synthesis of vanadium phosphorus oxide catalysts by aerosol processing. / Michalakos, Peter M.; Bellis, Harold E.; Brusky, Phyllis; Kung, Harold H; Li, Hai Q.; Moser, William R.; Partenheimer, Walter; Satek, Larry C.
In: Industrial and Engineering Chemistry Research, Vol. 34, No. 6, 1995, p. 1994-2000.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Synthesis of vanadium phosphorus oxide catalysts by aerosol processing
AU - Michalakos, Peter M.
AU - Bellis, Harold E.
AU - Brusky, Phyllis
AU - Kung, Harold H
AU - Li, Hai Q.
AU - Moser, William R.
AU - Partenheimer, Walter
AU - Satek, Larry C.
PY - 1995
Y1 - 1995
N2 - The use of an aerosol process to prepare vanadium phosphorus oxide (VPO) catalysts for butane oxidation to maleic anhydride was investigated. Heating an aerosol created with air of an aqueous solution of NH4VO3 and H3PO4 with phosphorus to vanadium atomic ratio P/V = 1.2 at 700°C resulted in a material that had an average vanadium oxidation state of 4.7-5.0. After activation in a butane and oxygen mixture, a stable catalyst was obtained which showed selectivities to maleic anhydride (MA) of up to 48% at 475°C. X-ray diffraction and laser Raman spectroscopic characterization of the catalyst showed that the as-prepared sample was mostly VOPO4·2H2O, which was converted to αI-VOPO4 under reaction conditions. The catalyst was much more active than a VPO catalyst with P/V = 1.1 or 1.2 prepared by the conventional method in an aqueous medium. Thus, in spite of its lower surface area and selectivity for MA, it produced a higher yield of MA even on the basis of the weight of catalyst.
AB - The use of an aerosol process to prepare vanadium phosphorus oxide (VPO) catalysts for butane oxidation to maleic anhydride was investigated. Heating an aerosol created with air of an aqueous solution of NH4VO3 and H3PO4 with phosphorus to vanadium atomic ratio P/V = 1.2 at 700°C resulted in a material that had an average vanadium oxidation state of 4.7-5.0. After activation in a butane and oxygen mixture, a stable catalyst was obtained which showed selectivities to maleic anhydride (MA) of up to 48% at 475°C. X-ray diffraction and laser Raman spectroscopic characterization of the catalyst showed that the as-prepared sample was mostly VOPO4·2H2O, which was converted to αI-VOPO4 under reaction conditions. The catalyst was much more active than a VPO catalyst with P/V = 1.1 or 1.2 prepared by the conventional method in an aqueous medium. Thus, in spite of its lower surface area and selectivity for MA, it produced a higher yield of MA even on the basis of the weight of catalyst.
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M3 - Article
VL - 34
SP - 1994
EP - 2000
JO - Industrial & Engineering Chemistry Product Research and Development
JF - Industrial & Engineering Chemistry Product Research and Development
SN - 0888-5885
IS - 6
ER -