Selective glycerol conversion to lactic acid on Co3O4/CeO2 catalysts

Palacio, Rubén; Torres, Sebastián; López, Diana; Hernández, Diana

doi:10.1016/j.cattod.2017.05.053

Cited by 49 publications

(25 citation statements)

References 34 publications

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“…444 Cu loading (B30%) was optimized to attain abundant metallic Cu species in CuO/ ZrO 2 catalyst, which could promote both dehydrogenation and hydrogenolysis of glycerol towards lactic acid production (94.6% yield). Palacio et al 445 demonstrated that the preparation method of nanostructured Co 3 O 4 /CeO 2 catalyst could strongly affect both glycerol conversion and lactic acid selectivity. Compared to deposition-precipitation synthesized catalyst, improved results i.e.…”

Section: Glycerol Upgradingmentioning

confidence: 99%

Advances in porous and nanoscale catalysts for viable biomass conversion

et al. 2019

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Section: Glycerol Upgradingmentioning

confidence: 99%

Advances in porous and nanoscale catalysts for viable biomass conversion

et al. 2019

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“…There is thus an increasing surplus of glycerol, creating a need to develop alternative ways to use residual glycerol. 2 Due to its high functionalization, glycerol can be transformed into several value-added products ( Table 1), such as lactic acid, [3][4][5] glyceric acid, 6-8 glycolic acid, [9][10][11] oxalic acid, 9,12 dihydroxyacetone, [13][14][15] glyceraldehyde, [16][17][18] 1,2-propanediol, [19][20][21] 1,3-propanediol, 22-24 1-propanol, 25,26 acrylic acid, [27][28][29] acrolein, [30][31][32] syngas, [33][34][35] mono-, di-, tri-glycerides, [36][37][38] triacetin, [39][40][41] glycerol oligomers, 42,43 and polymers. 44 Lactic acid is conventionally used as an acidulant and preservative in the food industry, in the chemical industry 45,46 as raw material for the production of pharmaceuticals, 47 cosmetics, 48 textiles, 49 leather,…”

Section: Reactionmentioning

confidence: 99%

“…Due to its high functionalization, glycerol can be transformed into several value‐added products (Table ), such as lactic acid, glyceric acid, glycolic acid, oxalic acid, dihydroxyacetone, glyceraldehyde, 1,2‐propanediol, 1,3‐propanediol, 1‐propanol, acrylic acid, acrolein, syngas, mono‐, di‐, tri‐glycerides, triacetin, glycerol oligomers, and polymers . Lactic acid is conventionally used as an acidulant and preservative in the food industry, in the chemical industry as raw material for the production of pharmaceuticals, cosmetics, textiles, leather, and, in a fast‐growing niche market, as monomer for the biodegradable polymer poly‐(lactic acid) or PLA .…”

Section: Introductionmentioning

confidence: 99%

Glycerol valorization: conversion to lactic acid by heterogeneous catalysis and separation by ion exchange chromatography

Arcanjo

Silva

Cavalcante

et al. 2019

Biofuels Bioprod Bioref

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The consumption and production of biodiesel has grown dramatically in recent decades, motivated by a strong interest in renewable energy. This has generated a surplus of its main by‐product, glycerol. Several catalytic processes have been proposed to generate alternatives for using this excess glycerol, mainly focusing on its transformation into high value‐added chemical products. Various products, ranging from syngas to organic acids, such as acrylic or lactic acid, along with 1,2‐propanediol, 1,3‐propanediol, glycerol ethers or even polymers, have been produced starting from glycerol. Among this multitude of possibilities, the production of lactic acid is one of the most interesting alternatives to valorize glycerol, because of the wide range of applications described for this organic acid. This review focuses on recent studies dealing with the catalytic conversion of glycerol to lactic acid, using different heterogeneous catalysts, and evaluates the factors influencing the oxidation catalytic process and the proposed reaction mechanisms. Finally, recent studies on the separation and purification of lactic acid using ion exchange chromatography resins are also reported. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd

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“…One of the main problems has been to produce a single desired product from glycerol via catalytic oxidation, with high and rapid conversion rate. Several researchers have focused on the use of precious-metal catalysts for glycerol oxidation, including Au nanoparticles (NPs), Au supported on TiO 2 , acid–base catalyst of hydroxyapatite (HAp), Cu 2 O and CuO/Al 2 O 3 , PtAgs keletons, bimetallic Pt–Co/CeO x , Au/Sn-USY, AuPt/TiO 2 , bidentate (pyridyl)methylcarbene ligands, ethylene-stabilized Pt NPs, graphite-supported nickel, Co 3 O 4 /CeO 2 , Cu–Zn–Al and Cu–Cr catalysts, MgO-, ZrO 2 -, HAp-supported metallic copper, Au–Pt on CeO 2 , Pt/L-Nb 2 O 5 , CuO/ZrO 2 , and Cu–Pt/AC hybrids, under base or base-free conditions, with the LA selectivity up to 85%, with 60–70% glycerol conversion. Among these, a stoichiometric HAp (Ca/P = 1.66) and HAp-supported Pd catalysts system exhibited a remarkably high LA selectivity of approximately 95%, with 99% glycerol conversion at a higher temperature of 230 °C .…”

Section: Introductionmentioning

confidence: 99%

Development of Au and 1D Hydroxyapatite Nanohybrids Supported on 2D Boron Nitride Sheets as Highly Efficient Catalysts for Dehydrogenating Glycerol to Lactic Acid

Bharath

Rambabu

Hai

et al. 2020

ACS Sustainable Chem. Eng.

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In this study, highly transparent and tightly packed two-dimensional boron nitride (2D BN NSs) nanosheets were prepared using an eco-friendly green-template-assisted synthesis method, where a banana stem powder was used as the bio template. Microscopic results indicated that 2D BN NSs mostly consisted of thin layers, with lateral sizes of 0.5 to 2 μm. Further, strongly coupled dual catalytic sites of 0D Au and c-axis oriented 1D hexagonal hydroxyapatite (HAp) nanorods were successfully immobilized and uniformly distributed on the surfaces of 2D BN NSs (Au/HAp/BN). A detailed study of Au/HAp/BN formation mechanism is presented in this paper. This study showed that due to the intriguing morphological, structural, and compositional features of Au/HAp/BN ternary nanohybrids, they can be used as an efficient heterogeneous catalytic oxidation system for oxidizing glycerol into lactic acid. In particular, the localized surface of BN was shown to exhibit high affinity toward adsorbing glycerol via higher adsorption affinity; therefore, an oxidizing reaction was obtained at the dual catalytic sites of Au and HAp in the heterogeneous catalytic system of Au/HAp/BN. On the Au/HAp/BN catalyst, 100% glycerol conversion yield was obtained with a high selective production of lactic acid (99.5%) in its base condition at a temperature of 100 °C. Different effects of the NaOH-glycerol molar ratio, reaction time of the catalytic activity, and selectivity of the Au/HAp/BN catalyst suggested that the dual-route reaction pathway was responsible for dehydrating glycerol to lactic acid; this has been elucidated in the paper. Reusability experiments showed the chemical stability and prolonged usage of the Au/HAp/BN catalyst, which can be beneficial for industrial applications.

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Selective glycerol conversion to lactic acid on Co3O4/CeO2 catalysts

Cited by 49 publications

References 34 publications

Advances in porous and nanoscale catalysts for viable biomass conversion

Advances in porous and nanoscale catalysts for viable biomass conversion

Glycerol valorization: conversion to lactic acid by heterogeneous catalysis and separation by ion exchange chromatography

Development of Au and 1D Hydroxyapatite Nanohybrids Supported on 2D Boron Nitride Sheets as Highly Efficient Catalysts for Dehydrogenating Glycerol to Lactic Acid

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