Oxidation of Glycerol with Unactivated Electroless CuNiMoP Catalyst

Abstract

Unannealed CuNiMoP electrocatalyst was found active in electrochemical oxidation of glycerol, providing over 60% conversion without optimization. Prompted by this result, the same catalyst was investigated for the thermochemical oxidation of glycerol. For the thermochemical oxidation of glycerol using the as-deposited electroless CuNiMoP catalyst, a 2 3 full factorial design of experiments (two level factorial experiment design with three factors) to assess the influence of temperature (A), reaction time (B) and pressure (C). The major reaction products detected by high performance liquid chromatography (HPLC) were glyceric, hydroxypyruvic, tartronic, oxalic and formic acids. The factors found to be most significant for the production of glyceric and tartronic acids were A, B, C, AB and BC. The highest percent conversion obtained for 30-min and 60-min catalysts was 10.6% and 9.4%, respectively. The presence of lactic acid was observed only for the 60-min as-deposited electroless CuNiMoP/Al 2 O 3 catalyst. The results suggest the feasibility of an inexpensive catalyst based on non-noble metals for the thermochemical oxidation of glycerol through the electroless deposition technique. Some differences exist between the thermochemical and electrochemical product selectivity of the CuNiMoP catalyst, and reasons are suggested for the observed differences.

Au@NiSx Yolk@Shell Nanostructures as Dual‐Functional Electrocatalysts for Concomitant Production of Value‐Added Tartronic Acid and Hydrogen Fuel

“…Owing to its high biological activity and anti-corrosive property, TART has found practical use in medical and pharmaceutical fields, and can be employed as a potential alternative to fossil-derived olefins and carboxylic acids in polymer production industry. [20,21] However, TART is an extremely expensive reagent (more than 1500 USD per gram) [22,23] with a price four orders of magnitude higher than crude glycerol. Devising an electrolytic route to the production of TART from biomass-derived glycerol is thus essential for expanding the global market size.…”

Catalisadores a base de ródio e níquel depositados sobre carbono para eletro-oxidação de glicerol

“…Os exemplos de produtos formados pela reação de oxidação do glicerol são: gliceraldeído (GALD), dihidroxiacetona (DHA), ácido glioxílico (AGO), ácido glicérico (AGL), ácido hidroxipirúvico (AHP), ácido tartrônico (AT), ácido oxálico (AOX), ácido fórmico (AF) e ácido glicólico (AGI). O produto formado, e majoritário da reação, vai depender de fatores físico-químicos, interação com o catalisador e da estabilidade do mesmo perante as condições as quais foram submetidos (Sankar, Onyeozili e Kalu, 2017;Skrzyńska et al, 2012).…”