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Acetone gas phase condensation on alkaline metals doped TiO2 sol–gel catalysts by Marcial Zamora; Tessy López; Ricardo Gómez; Maximiliano Asomoza; Ruth Meléndrez is a Materials Science article available to read on EtoBox.

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The vapor-phase condensation of acetone was studied over sol-gel prepared TiO 2 and TiO 2 -doped with 1 wt.% of Li + or Rb + . The acetone condensation was catalyzed by basic sites and the obtained products were mesityl oxide (MO), isomesityl oxide (ISMO), mesitylene (M) as well as isophorone (IP) and phorone (P). The TiO 2 crystalline structure was characterized by XRD and the basicity of catalysts by means of CO 2 chemisorption. The number of basic sites was 0.057 mmol CO 2 /g for TiO 2 and Rb/ TiO 2 and 0.676 mmol CO 2 /g for Li/TiO 2 catalyst. CO 2 -TPD showed that the strongest of the basic sites follows the order Rb/ TiO 2 > TiO 2 > Li/TiO 2 . Activity was found of the same order in the three catalysts. Selectivity patterns shown that MO (70%) was the main product in Li/TiO 2 while for TiO 2 and Rb/TiO 2 comparable amounts of MO (41 and 44%) and M (39 and 39%) were obtained.

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Author

Marcial Zamora; Tessy López; Ricardo Gómez; Maximiliano Asomoza; Ruth Meléndrez

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0169-4332)

Published

2005

Language

EN

Field

Materials Science (Physical Sciences)