Selective Oxidation of 1,2-Propanediol to Lactic Acid over Different Supported Au, Pt and Pd Catalysts

2019 ◽  
Vol 800 ◽  
pp. 88-92 ◽  
Author(s):  
Svetlana Chornaja ◽  
Svetlana Zhizhkuna ◽  
Jevgenija Vladiko ◽  
Konstantins Dubencovs
Keyword(s):  
Lactic Acid ◽  
Catalytic Oxidation ◽  
Molecular Oxygen ◽  
Heterogeneous Catalyst ◽  
Selective Oxidation ◽  
Main Product ◽  
Oxidation Process ◽  
Pd Catalysts ◽  
Oxidation With Molecular Oxygen ◽  
By Products

1,2-Propanediol selective oxidation with molecular oxygen in presence of heterogeneous catalyst is one of the most nature friendly 1,2-propanediol conversion methods. This work demonstrates Au, Pt and Pd containing catalysts’ activity and selectivity in a 1,2-propanediol oxidation process. The main product of the 1,2-propanediol catalytic oxidation was lactic acid, by-products were acetic and formic acids. It was found that Au based catalysts are best for 1,2-propanediol oxidation in alkaline water solutions. The best result was achieved using the 4.8wt%Au/Al2O3catalyst: selectivity by lactic acid was 94% with 1,2-propanediol conversion 100% (c0(1,2-propanediol) = 0.3 mol/L, P(O2) = 6 atm, n (1,2-propanediol)/n (Au) = 500, t = 60°C, c0(NaOH) = 1.5 mol/L).

Kinetic Model of the 1,2-Propanediol Oxidation Reaction in the Presence of 3wt%Pd/α-Al2O3 Catalyst

2021 ◽  
Vol 903 ◽  
pp. 143-148
Author(s):  
Svetlana Cornaja ◽  
Svetlana Zhizhkuna ◽  
Jevgenija Vladiko
Keyword(s):  
Activation Energy ◽  
Lactic Acid ◽  
Kinetic Model ◽  
Catalytic Oxidation ◽  
Molecular Oxygen ◽  
Oxidation Reaction ◽  
Main Product ◽  
Oxidation Process ◽  
Water Solution ◽  
Reaction Conditions

Supported 3wt%Pd/α-Al₂O₃ catalyst was tested in selective oxidation of 1,2-propanediol by molecular oxygen. It was found that the catalyst is active in an alkaline water solution. Lactic acid was obtained as the main product of the reaction. Influence of different reaction conditions on 1,2-PDO conversion and oxidation process selectivity was studied. Partial kinetic orders of the reaction with respect to 1,2-propanediol, c0(NaOH), p(O2), n(1,2-PDO)/n(Pd)) were determined and an experimental kinetic model of the catalytic oxidation reaction was obtained. Activation energy of the process was calculated and was found to be about 53 ± 5 kJ/mol.

Oxidation Kinetics of 1,2-Propanediol in the Presence of Pd and Pt Catalysts

2020 ◽  
Vol 850 ◽  
pp. 48-53
Author(s):  
Svetlana Chornaja ◽  
Svetlana Zhizhkuna ◽  
Jevgenija Vladiko ◽  
Reinis Drunka ◽  
Aija Krūmiņa
Keyword(s):  
Lactic Acid ◽  
Molecular Oxygen ◽  
Selective Oxidation ◽  
Oxidation Kinetics ◽  
Main Product ◽  
Pt Catalysts ◽  
Acid Yield ◽  
Active Metal ◽  
Oxidation Parameters ◽  
Kinetics Of

1.25 – 5wt%Pt/Al2O3, 1.25 – 5wt%Pd/Al2O3, 1wt%Pd/TiO2, 1 – 5wt%Pd/TiO2-NF, 1.25wt%Pt+1.25wt%Pd/Al2O3, 5wt%Pt/SiO2, 5wt%Pt/C catalysts were synthesised and tested in the selective oxidation of 1,2-propanediol by molecular oxygen. It was found that all catalysts were active in alkaline water solutions; lactic acid was obtained as the main product of the reaction. The conversion of 1,2-propandiol and the yield of lactic acid depended on the content of active metal in the catalysts. The most active for the oxidation of 1,2-propandiol were palladium-containing catalysts supported on TiO2 nanofibers (Pd/TiO2-NF). The highest 1,2-propanediol conversion (100 %) and lactic acid yield (96 %) were obtained using the 5wt%Pd/TiO2-NF catalyst at the following oxidation parameters: c0(1,2-propanediol) = 0.3 mol/L, P(O2) = 1 atm, n (1,2-propanediol)/n (Pd) = 500 mol/mol, t = 60 °C, c0(NaOH) = 1.5 mol/L.

scholarly journals Tuning product selectivity in the catalytic oxidation of glycerol by employing metal-ZSM-11 materials

2020 ◽  
Vol 44 (11) ◽  
pp. 4363-4375 ◽  
Author(s):  
Eliana Diguilio ◽  
Emilce D. Galarza ◽  
Marcelo E. Domine ◽  
Liliana B. Pierella ◽  
María S. Renzini
Keyword(s):  
Lactic Acid ◽  
Catalytic Oxidation ◽  
Selective Oxidation ◽  
Product Selectivity ◽  
Mesoporous Zeolites

Selective oxidation of glycerol towards dihidoxyacetone and lactic acid, employing micro/mesoporous zeolites with copper(ii) and chromium(iii).

Au/Mg(OH)2: Highly efficient for selective oxidation of 1,2-propanediol to lactic acid with molecular oxygen

2010 ◽  
Vol 53 (7) ◽  
pp. 1497-1501 ◽  
Author(s):  
Hong Ma ◽  
Xin Nie ◽  
JiaYing Cai ◽  
Chen Chen ◽  
Jin Gao ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Molecular Oxygen ◽  
Selective Oxidation ◽  
Highly Efficient

scholarly journals K-10 montmorillonite: An efficient and reusable catalyst for selective oxidation of aldehydes in the presence of dioxygen

2019 ◽  
Vol 8 (5) ◽  
pp. 380-389
Author(s):  
Ikram EL Amrani ◽  
Ahmed Atlamsani
Keyword(s):  
Catalytic Activity ◽  
Catalytic Oxidation ◽  
Molecular Oxygen ◽  
Selective Oxidation ◽  
Reusable Catalyst ◽  
Good Activity ◽  
Mild Conditions ◽  
Catalyst Temperature ◽  
Clay Catalyst ◽  
Excellent Selectivity

A commercial montmorillonite clay catalyst, K-10 montmorillonite, was tested for catalytic oxidation of aldehydes in the presence of molecular oxygen under mild conditions. K-10 montmorillonite catalysed the oxidation of aldehydes with good activity and excellent selectivity toward the formation of the corresponding acids. The effects of the amount of catalyst, temperature and solvent on the catalytic activity were investigated. Remarkably, this catalyst was reusable without any appreciable loss in activity and selectivity.

scholarly journals Platinum nanoparticles supported on N-doped carbon nanotubes for the selective oxidation of glycerol to glyceric acid in a base-free aqueous solution

RSC Advances ◽  
2015 ◽  
Vol 5 (40) ◽  
pp. 31566-31574 ◽  
Author(s):  
Shasha Chen ◽  
Puyu Qi ◽  
Jin Chen ◽  
Youzhu Yuan
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Molecular Oxygen ◽  
Selective Oxidation ◽  
Platinum Nanoparticles ◽  
Atmospheric Pressure ◽  
Glyceric Acid ◽  
Glycerol Oxidation ◽  
Glycerol Conversion ◽  
Oxidation With Molecular Oxygen

Pt/N-CNT out-performed Pt/CNT for glycerol oxidation with molecular oxygen under atmospheric pressure in a base-free aqueous solution, in terms of glycerol conversion and glyceric acid selectivity.

scholarly journals The controlled catalytic oxidation of furfural to furoic acid using AuPd/Mg(OH)2

2017 ◽  
Vol 7 (22) ◽  
pp. 5284-5293 ◽  
Author(s):  
Mark Douthwaite ◽  
Xiaoyang Huang ◽  
Sarwat Iqbal ◽  
Peter J. Miedziak ◽  
Gemma L. Brett ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Heterogeneous Catalyst ◽  
Selective Oxidation ◽  
Reaction Conditions ◽  
Furoic Acid

The selective oxidation of furfural to furoic acid is achieved at mild reaction conditions over an AuPd/Mg(OH)2 heterogeneous catalyst.

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