ANALYSIS OF CATALYTIC BEHAVIOR OF RHENIUM PROMOTED PT/TIO2 CATALYST IN ERYTHRITOL HYDROGENOLYSIS

EMANUEL VIRGILIO; MARIA EUGENIA SAD; CRISTINA PADRÓ

LATIN AMERICAN APPLIED RESEARCH

PLAPIQUI(UNS-CONICET)

Lugar: Bahia Blanca; Año: 2023 vol. 53 p. 13 - 18

0327-0793

Rhenium modified Pt/TiO2 catalyst has been tested during erythritol (ERY) hydrogenolysis reaction in a slurry reactor. N2 physisorption, temper-ature programmed reduction and CO chemisorption characterizations were performed. After reduction treatment, Pt species were fully reduced with a dis-persion of 26% whereas Re species remained partially oxidized. ERY may convert through four pathways: isomerization, dehydration and C-O or C-C hydro-genolysis. Pt-Re/TiO2 was active and selective to bu-tanetriols and butanediols formation. The influence of temperature (423–498 K) and reactant concentrations (15-35 barH2 and 0.2-0.6 MERY) on catalytic activity and products distribution were evaluated; the activa-tion energy and the reaction orders for each route were estimated. Dehydration pathway displayed the highest activation energy whereas isomerization showed the lowest value. The order to ERY and H2 were 0.23 and 0.97 respectively, for C-O hydrogenol-ysis route and is consistent with two different mecha-nisms proposed for the removal of primary or second-ary OH group.