Study of silica-supported heteropoly acids by microcalorimetry |
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| Authors: | Frédéric Lefebvre Bernadette Jouguet and Aline Auroux |
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| Institution: | (1) Laboratoire de Chimie Organométallique de Surface, 2 avenue Albert Einstein, 69626 Villeurbanne Cedex, France;(2) Institut de Recherches sur la Catalyse, 2 avenue Albert Einstein, 69626 Villeurbanne Cedex, France |
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| Abstract: | Silica-supported heteropoly acids have been studied by microcalorimetry. The results are greatly dependent on both the activation temperature and the heteropoly acid, in agreement with the n-hexane cracking experiments. It is shown that very strong acid sites are formed on H4SiW12O40/SiO2 activated at 623 K and on H3PW12O40/SiO2 activated at 423 K. |
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