Efficient catalytic ozonation by ruthenium nanoparticles supported on SiO2 or TiO2: Towards the use of a non-woven fiber paper as original support

Pierre-Francois Biard (1) , Baraa Werghi (2) , Isabelle Soutrel (1) , Romain Orhand (1) , Annabelle Couvert (1) , Audrey Denicourt-Nowicki (1) , Alain Roucoux (1)

1 ISCR - Institut des Sciences Chimiques de Rennes
2 KAUST Catalysis Center

This work focuses on the use of Ru(0) nanoparticles as heterogeneous catalyst for ozone decomposition and radical production. In a first set of experiments, the nanoparticles have been deposited on two inorganic supports (TiO 2 or SiO 2) by a wet impregnation approach. This study confirmed the high potential of Ru nanoparticles as active species for ozone decomposition at pH 3, since the ozone half-life time decreases by a factor 20-25, compared to the reference experiment carried out without any catalyst. The enhancement of the ozone decomposition kinetics provided an improved radical production and a higher transient radical concentration in a shorten ozone exposure. Consequently, lower oxidant dosage and contact time would be necessary. Thus, very significant atrazine consumption kinetics enhancements were measured. In a second set of experiments, a non-woven fiber paper composed of a TiO 2 /SiO 2 /zeolite mixture has been evaluated as an original support for ruthenium nanoparticles. Even if lower ozone decomposition kinetics was observed compared to TiO 2 or SiO 2 , this support would be a promising alternative to inorganic * Corresponding author : [e-mail], [phone]

Mots clés: Catalyst; Catalytic ozonation; Micropollution; Ozone; Ruthenium nanoparticles

Domaines: Génie chimique

Pierre-Francois Biard, Baraa Werghi, Isabelle Soutrel, Romain Orhand, Annabelle Couvert, et al.. Efficient catalytic ozonation by ruthenium nanoparticles supported on SiO2 or TiO2: Towards the use of a non-woven fiber paper as original support. Chemical Engineering Journal, 2016, 289, pp.374-381. ⟨10.1016/j.cej.2015.12.051⟩. ⟨hal-01556683⟩