Innovative sol-gel routes to metal doped mesoporous Ta-SiO2 catalysts for the upgrading of bioethanol to butadiene
(2020) 11th International Conference on Environmental Catalysis (ICEC) — Location: Manchester, UK (6.September.2020)
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- Here, we present the first example of the preparation of bifunctional Cu- and Ta-based mesoporous catalysts by AASG. An aqueous solution containing Cu nitrate, Ta ethoxide and pre-hydrolyzed TEOS (supplemented with a pluronic surfactant) is sprayed and dried to yield spherical particles with calibrated porosity. After calcination, the catalysts display advantageous texture (SSA≈450 m2 g–1; Vp≈0.5 mL g–1; Dp≈4.5 nm). As evidenced by in situ XRD and by XPS, the Cu species that are initially dispersed in the bulk of the metallosilicate undergo a migration towards the surface during calcination, to form small CuO nanoparticles. Tests in the ethanol to butadiene reaction allowed us to select the optimal calcination temperature (500°C), to maximize the dehydrogenation activity of Cu nanoparticles. All in all, the best catalyst (2 wt%Ta and 5 wt%Cu) reached a 27 % yield at 355 °C.
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Dochain, D. D., Styskalik, A., Vanden Daelen, A., & Debecker, D. (2020). Innovative sol-gel routes to metal doped mesoporous Ta-SiO2 catalysts for the upgrading of bioethanol to butadiene. 11th International Conference on Environmental Catalysis (ICEC), Manchester, UK. https://hdl.handle.net/2078.5/120268