Ru/ReO x /TiO 2 Selective and Reusable Catalyst for C−O Hydrogenolysis of C 4 Polyols

VIRGILIO, EMANUEL M.; PADRÓ, CRISTINA L.; SAD, MARÍA E.

CHEMCATCHEM

WILEY-V C H VERLAG GMBH

Año: 2023

1867-3880

This study reports theselective obtaining of butanediols, mainly 23BDO and 12BDO isomers, by C-Ohydrogenolysis of erythritol on Ru (2%) supported on titania at 473 K and 25bar H2 and their modification with Re species that improve theselectivity to C-O hydrogenolysis over other reactions (C-C hydrogenolysis,dehydration, etc). The dependence of the catalytic activity with reactiontemperature and reactants concentrations is also discussed. Characterization byXPS, TEM and TPR indicates that the surface of rhenium modified Ru is formed bysmall particles (<3nm) of Ru0 in contact with ReIV(Re/Ru molar ratio ≈1). Over this catalyst(Ru/ReOx/TiO2) close or even higher BDO yields thanprevious values reported on other noble metals were obtained, making it very attractivesince Ru is more economical than Pt, Ir or Rh metal. Furthermore, wedemonstrate that Ru/ReOx/TiO2 was also stable and allowedto be reused in at least three consecutive reactions.