preparation and characterization of ru-sn/al2o3 catalysts for the hydrogenation of fatty acid methyl esters
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ID: 182451
2010
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Abstract
Ru-Sn/Al2O3 catalysts with different Sn loadings were prepared by the coimpregnation method. Several characterization techniques such as TPR, pyridine TPD and catalytic tests for dehydrogenation and hydrogenolysis were used to evaluate and compare such catalysts. TPR results indicate that Sn is deposited both onto the support and as species strongly interacting with Ru. Such non selective deposition modifies the acid and metallic functions of the catalysts. Both total acidity and acid strength distribution are affected: total acidity decreases and new sites of lower acid strength are created. Both dehydrogenating and hydrogenolytic activities are strongly diminished by the addition of Sn. Results of catalytic tests for methyl oleate hydrogenation indicate that methyl stearate is the main product, with only minute amounts of oleyl alcohol produced, and that the addition of Sn diminishes the hydrogenation activity.
| Reference Key |
mazzieri2010qumicapreparation
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|---|---|
| Authors | ;Vanina A. Mazzieri;Mario R. Sad;Carlos R. Vera;Carlos L. Pieck;Ricardo Grau |
| Journal | greece and rome |
| Year | 2010 |
| DOI |
10.1590/S0100-40422010000200007
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| URL | |
| Keywords | Keywords not found |
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