TY - JOUR
T1 - Supported VPO catalysts for selective oxidation of butane III
T2 - Effect of preparation procedure and SiO2 support
AU - Bueno, J. M.C.
AU - Bethke, G. K.
AU - Kung, M. C.
AU - Kung, H. H.
N1 - Funding Information:
This work was supported by the U.S. Department of Energy, Basic Energy Sciences. J.M.C. Bueno acknowledges support from CNPq (Brasil) Conselho Nacional de Desenvolvimento Cientifica e Tecnologico. Cab-O-Sil silica was provided by Cabot Corporation. A. Chu Kung assisted in collecting diffuse reflectance spectra, and G.W. Sutton assisted in collecting reaction data and XRD spectra.
PY - 1998/8/13
Y1 - 1998/8/13
N2 - The effects of the nature of silica support and removal of soluble vanadium species by ethanol on the catalytic properties of silica-supported VPO catalysts were investigated. Ethanol preferentially removes V+5 species. For a silica-supported sample of PIV ratio much lower than two, ethanol treatment resulted in a sample of higher PIV ratio and higher selectivity for maleic anhydride in butane oxidation. The crystalline VPO phases formed differed on a hydrophobic vs. hydrophilic silica. (VO)2P2O7 could be formed more easily on the former support. Interestingly, for all silica-supported catalysts, the maleic anhydride selectivity depended much more strongly on the PIV ratio than on the method of preparation, the nature of the silica, or the crystalline VPO phase present.
AB - The effects of the nature of silica support and removal of soluble vanadium species by ethanol on the catalytic properties of silica-supported VPO catalysts were investigated. Ethanol preferentially removes V+5 species. For a silica-supported sample of PIV ratio much lower than two, ethanol treatment resulted in a sample of higher PIV ratio and higher selectivity for maleic anhydride in butane oxidation. The crystalline VPO phases formed differed on a hydrophobic vs. hydrophilic silica. (VO)2P2O7 could be formed more easily on the former support. Interestingly, for all silica-supported catalysts, the maleic anhydride selectivity depended much more strongly on the PIV ratio than on the method of preparation, the nature of the silica, or the crystalline VPO phase present.
KW - Butane oxidation on supported vpo catalyst
KW - Maleic anhydride by butane oxidation
KW - Preparation of supported vpo catalysts
KW - Vpo catalysts supported
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U2 - 10.1016/S0920-5861(98)00138-2
DO - 10.1016/S0920-5861(98)00138-2
M3 - Article
AN - SCOPUS:0000065934
SN - 0920-5861
VL - 43
SP - 101
EP - 110
JO - Catalysis Today
JF - Catalysis Today
IS - 1-2
ER -