H3PW12O40 acid dispersed on its Cs salt: improvement of its catalytic properties by mechanical mixture and grinding |
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Authors: | Pierre-Yves Gayraud Nadine Essayem Jacques C. Védrine |
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Affiliation: | (1) CNRS, Institut de Recherches sur la Catalyse, 2 avenue Albert Einstein, 69626 Villeurbanne Cedex, France E-mail: |
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Abstract: | Acidic cesium salts Csx H3-xPW12O40 have been prepared by grinding together amounts of H3PW12O40 and porous Cs3PW12O40 compounds in varying stoichiometries. It is shown that this procedure leads to a dispersion of the acid on top of the high surface area Cs3PW12O40 salt (160 m2 g-1), and, subsequently, yields high surface area materials which exhibit a much higher catalytic activity for n-butane isomerisation at 473 K when compared with samples prepared directly by chemical precipitation. This improvement holds particularly true with low Cs content (x < 2). This revised version was published online in July 2006 with corrections to the Cover Date. |
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Keywords: | cesium salt of polyoxotungstate heteropoly acid acidity n>-butane isomerisation |
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