Selective Oxidation of Glycerol to Glyceraldehyde over Novel Monometallic Platinum Catalysts

Abstract

Several novel monometallic platinum catalysts supported on metal oxides (Al2O3, Y2O3, γ-Al2O3, Lu2O3, ZrO2-Y2O3 TiO2, SiO2, γ-AlO(OH)) and activated carbon (C) were synthesized by extractive-pyrolytic method and tested in glycerol oxidation processes without base addition to obtain glyceraldehyde. It was found that Pt catalyst activity is strongly influenced by support nature, oxygen partial pressure and Pt loading. Pt/Al2O3 and Pt/SiO2 catalysts exhibited the highest activity but selectivity to glyceraldehyde significantly decreased when glycerol conversion increased.

Making natural products from renewable feedstocks: back to the roots?

“…Glycerol is produced on a large scale through saponication of fats and oils 346 and e.g. can serve for the production of glyceraldehyde, 386,387 allylic alcohol, 217 acrolein, 388 and acrylic acid 179 as well as of polymers of the latter. The main methods to valorize free fatty acids for chemical production are esterication, reduction, allylic oxidation, addition, dihydroxylation, epoxidation, cycloaddition, metathesis and ozonolysis.…”

“…Like dihydroxyacetone, glyceraldehyde can be generated from glycerol, e.g. by aerial oxidation over platinum catalysts, 386 or directly by fermentation of carbohydrate biomass. 445 Proline-catalyzed aldol reaction of acetonide-protected aldehyde 289 and acetone led to the respective b-hydroxy ketone 290 in excellent de which was protected with a TBDPS group.…”

Insights into Activated Carbon-Supported Platinum Catalysts for Base-Free Oxidation of Glycerol

“…Many monometallic and bimetallic supported catalysts have been tested for the reaction in a base-free condition. − The Pt catalyst was found to be the most active among the monometallic catalysts. ,, Carbon materials, especially activated carbons with large specific surface area and relatively low price, are usually employed as the supports because of their high resistance to acidic environments. , Meanwhile, the extraordinary electrical conductivity of carbon materials may have a significant impact on the electronic properties of Pt nanoparticles. , However, the activated carbon (AC)-supported Pt catalyst has shown poor activity in glycerol oxidation under base-free conditions. ,, In view of a practical application, it is highly desirable to prepare an AC-supported Pt catalyst with superior activity for glycerol oxidation.…”

“…18,20 However, the activated carbon (AC)supported Pt catalyst has shown poor activity in glycerol oxidation under base-free conditions. 7,21,22 In view of a practical application, it is highly desirable to prepare an AC-supported Pt catalyst with superior activity for glycerol oxidation.…”