Selective oxidation of 1,2-propanediol to lactic acid over Cu-modified Au/hydrotalcite catalysts

Abstract

Catalytic oxidation of biomass-derived 1,2-propanediol to valuable lactic acid were investigated over various Cu modified Au supported on Mg-Al hydrotalcite (HT). Compared to those of individual Au-HT, the better catalytic...

Glycerol selective oxidation to lactic acid over platinum–vanadium bimetallic catalysts supported on activated carbon

“…The 1,2-PDO yield was reduced from 6.5 to 2.2% at higher catalyst loading (4400 mol mol −1 ) and higher reaction time (12 h), indicating that 1,2-PDO is converted to LA or pyruvaldehyde. 49,50 Similar observations were made with KOH as a base. Please see Fig.…”

“…The decrease in 1,2-PDO yield was significant in NaOH compared to that in the presence of KOH. This could be attributed to the conversion of 1,2-PDO to LA or pyruvaldehyde 49,50 in the presence of NaOH. The longer reaction times may also promote further oxidation of GLA and FA to gaseous products.…”

“…Based on our experimental investigations and associated literature data, [18][19][20]22,28,29,[48][49][50] a plausible reaction pathway for the 1Pt-1V/AC catalyzed oxidation of glycerol to lactic acid in alkaline (KOH or NaOH) solution was established, as summarized in Scheme 1. The first step of the reaction involves the selective oxidation of glycerol to glyceraldehyde Reaction Chemistry & Engineering Paper and dihydroxyacetone.…”

Efficient Synthesis of Pharmaceutical Intermediates from Biomass-Derived Aldehydes and Ketones over Robust NixAl Nanocatalysts

“…Both the IV-type isotherms and the pore size distribution of Ni x Al catalysts (Figure S1) represent the existence of well-developed mesoporous structure characteristics . The high surface area and moderate average pore diameter are beneficial for improving the catalytic performance by enhancing the exposure of active sites and the diffusion of substrates and products . In addition, the largest surface area of 186.2 m 2 /g and minimal average pore diameter of 9.3 nm existed in the Al 2 O 3 support.…”

“…34 The high surface area and moderate average pore diameter are beneficial for improving the catalytic performance by enhancing the exposure of active sites and the diffusion of substrates and products. 35 In addition, the largest surface area of 186.2 m 2 /g and minimal average pore diameter of 9.3 nm existed in the Al 2 O 3 support. The surface area of pure Ni was merely 0.2 m 2 / g, while the average pore diameter reached 241.5 nm.…”