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Aerosol route to TiO2–SiO2 catalysts with tailored pore architecture and high epoxidation activity

preprint
submitted on 02.01.2019 and posted on 03.01.2019 by Valentin Smeets, Cédric Boissière, Clément Sanchez, Eric M. Gaigneaux, Elise Peeters, Bert F. Sels, Michiel Dusselier, Damien Debecker
We present the aerosol-assisted sol-gel preparation of hierarchically porous TiO2–SiO2 catalysts having a sphere-like shell morphology and a high Ti dispersion. In order to control the porosity at the micro-, meso- and macro- levels, we use the evaporation-induced self assembly (EISA) of a surfactant, possibly combined with polymer beads as hard templates. These catalysts are tested for the epoxidation of cyclohexene with cumene hydroperoxide as oxidant, and their performance is compared to the reference TS-1 zeolite. The high catalytic performance observed with the catalysts prepared by aerosol stems from their high specific surface area, but also from the short diffusion path length generated by the meso-/macro-pore architecture which provide entryways for bulky reactants and products.

History

Email Address of Submitting Author

damien.debecker@uclouvain.be

Institution

UCLouvain

Country

Belgium

ORCID For Submitting Author

0000-0001-6500-2996

Declaration of Conflict of Interest

No conflict of interest

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