Liquid-Phase Oxidation of Glycerol over a Pt/C Catalyst: Optimization of the Reaction Conditions

MARÍA LAURA FAROPPA; JOAQUÍN O. ALCORTA; HERNÁN P. BIDEBERRIPE; GUILLERMO J. SIRI; MÓNICA L. CASELLA

Anales de la Asociación Química Argentina

Asociación Química Argentina

Lugar: CABA; Año: 2018 vol. 105 p. 57 - 68

2545-8655

Liquid-phase glycerol (Gly) oxidation was investigated systematically over a Pt/C catalyst. The catalyst was prepared by impregnation with a (NH4)2[PtCl4] solution, in order to obtain a 1 wt% Pt. The catalyst was characterized by AAS, TEM and TPR techniques. The reaction conditions were optimized by conducting experiments in the range of temperature from 40 to 60°C, Gly/Pt molar ratio between 4000 and 10000, pH between 5 and 13 and H2O2 concentration in order to get between 2.5 and 10 volumes of active oxygen in the reactor. The optimum reaction conditions were identified as 60°C, Gly/Pt = 4000, pH= 5, H2O2 concentration enough to obtain 10vol of O2, 100 mg catalyst and constant stirring. Under these conditions, a maximum glyceric acid (GlyA) selectivity of 57.1% was obtained at 37% Gly conversion.