Resumo

SALAZAR, Juan Carlos; LLANO, Mario A.; PEREZ, Germán  e  URRESTA, Julián D.. Synthesis and characterization of WO ₃ /ZrO ₂ and WO ₃ /TiO ₂ acid systems applied to the hydration of ethylene to ethanol. Rev. ion [online]. 2017, vol.30, n.2, pp.43-54. ISSN 0120-100X.  https://doi.org/10.18273/revion.v30n2-2017004.

This work focuses on the synthesis and characterization of two acid systems obtained by the incipient wetness impregnation method, starting from a tungsten salt and using the metal oxides TiO2 and ZrO2 as supports. The two catalyst systems WO3/ZrO2 and WO3/TiO2 were prepared with loads of tungsten of 10, 30 and 40%wt. Surface densities, phase transitions, morphological structure, and thermal stability were determined for each of the tungsten loads used to prepare the catalysts. Additionally, the catalytic activity of these catalysts was evaluated for the hydration of ethylene to ethanol in the presence of a mixture of liquid and gaseous phases, using an equimolar ratio of ethylene to water at pressures from 30 to 40bar. The results revealed that the catalysts that showed a better performance, reaching a selectivity to ethanol of 98%, were those with a low load of tungsten (10%wt.) at a pressure in the range from 30 to 40bar.

Palavras-chave : ethylene; hydration; tungsten; acid catalysts.

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