Abstract
Acidity of polyatom-substituted H n PW11M1O40 (M=V, Nb, Ta, and W) Keggin heteropolyacids (HPAs) was measured by NH3-TPD experiments. Acidity decreased in the order of H3PW11W1O40>H4PW11V1O40>H4PW11Nb1O40>H4PW11Ta1O40. Vapor-phase dehydration of cyclohexanol was conducted as a model reaction to correlate the acidity with the acid catalysis of HPA catalysts. Yield for cyclohexene (a product by acid catalysis) increased with increasing acidity of H n PW11M1O40 (M=V, Nb, Ta, and W) HPA catalysts. The acidity of H n PW11M1O40 (M=V, Nb, Ta, and W) HPA catalysts could be utilized as a probe of acid catalysis for dehydration of cyclohexanol.
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Park, D.R., Hong, U.G., Song, S.H. et al. Acidity and acid catalysis of polyatom-substituted H n PW11M1O40 (M=V, Nb, Ta, and W) Keggin heteropolyacid catalysts. Korean J. Chem. Eng. 27, 465–468 (2010). https://doi.org/10.1007/s11814-010-0082-1
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DOI: https://doi.org/10.1007/s11814-010-0082-1