Oxidation of glycerol in base-free aqueous solution using carbon-supported Pt and PtSn catalyst

MARÍA LAURA FAROPPA; MARÍA EUGENIA CHIOSSO; JUAN JOSÉ MUSCI; MARCO, A. OCSACHOQUE ; ANDREA MERLO; CASELLA, MÓNICA L.

Catalysts

Multidisciplinary Digital Publishing Institute (MDPI)

Año: 2023 vol. 13 p. 1071 - 1086

2073-4344

In the present work, we studied the catalytic performance (activity and selectivity) of Pt 15 supported on carbon systems and Pt modified with tin in the glycerol oxidation with H2O2 as the 16 oxidising agent at atmospheric pressure, 60 ºC, and base-free conditions. The glycerol conversion 17 obtained with monometallic Pt catalyst was 37% and remained unchanged with the addition of Sn 18 in a ratio Sn/Pt= 0.4. The two bimetallic PtSn catalysts were able to oxidise commercial glycerol to 19 dihydroxyacetone (DHA), and the selectivity to DHA reached 97% for the bimetallic catalyst with 20 better conversion. In the reaction with crude glycerol, the conversion obtained was around 40% for 21 the three catalysts, and the major product observed was glyceric acid. Both dihydroxyacetone and 22 glyceric acid are high added value products with potential applications in different areas such as 23 organic chemistry, medical and cosmetics industries.