Selective aerobic-oxidation of glycerol to lactic acid over ruthenium-vanadium bimetallic catalysts

Pemmana, Hanumanth Reddy; Baranwal, Prince Kumar; Uppaluri, Ramagopal VS; Peela, Nageswara Rao

doi:10.1016/j.jiec.2023.04.010

Cited by 4 publications

(3 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The most critical technology for catalyzing glycerol to produce lactic acid is the catalyst. In the past decade, the catalysts used for glycerol oxidation to produce lactic acid were mainly focused on noble metals, such as Pt, Pd, Au, Ir, Ru, etc., − and the lactic acid yields were close to 60% in most studies. However, by considering the cost of noble metals, some researchers began to apply non-noble metals in the conversion of glycerol to lactic acid, among which copper-based catalysts showed the best catalytic performance .…”

Section: Introductionmentioning

confidence: 57%

Selective Oxidation of Glycerol to Lactic Acid Catalyzed by CuO/Activated Carbon and Reaction Kinetics

Li,

Wang

et al. 2024

ACS Omega

View full text Add to dashboard Cite

Activated carbon-supported CuO catalysts were prepared by an ammonia evaporation method and applied to catalyze the selective oxidation of glycerol to lactic acid. The effects of CuO loadings on the structure and catalytic performance of the catalyst were investigated. Results showed that CuO could be dispersed uniformly on the surface of activated carbon, promoting the increase of the reaction rate and accelerating the glycerol conversion significantly. As CuO loadings increased, the rate of glycerol consumption and yield to lactic acid was increased. However, too high CuO loadings would destroy the original pore structure of activated carbon and aggravate the agglomeration of CuO, resulting in a decrease in the catalytic performance of the catalyst. The best catalytic performance was obtained over 10% CuO/AC when the reaction temperature was 190 °C and the reaction time was 5 h. At this point, the selectivity to lactic acid reached 92.61%. In addition, power-function type reaction kinetic equations were used to evaluate the effect of glycerol and NaOH concentrations and the reaction temperature on the oxidation of glycerol to lactic acid over 10% CuO/AC. The activation energy of the reaction is 134.39 kJ•mol −1 , which is higher than that using single CuO as the catalyst. This indicates that CuO/AC is more temperature-sensitive than CuO and can probably achieve a higher lactic acid yield at high temperatures. At the same time, it is indicated that CuO supported on activated carbon can enhance the catalytic activity of CuO effectively.

show abstract

Section: Introductionmentioning

confidence: 57%

Selective Oxidation of Glycerol to Lactic Acid Catalyzed by CuO/Activated Carbon and Reaction Kinetics

Li,

Wang

et al. 2024

ACS Omega

View full text Add to dashboard Cite

show abstract

“…The vanadium presence in the catalysts leads to the formation of dihydroxyacetone or Reaction Chemistry & Engineering Paper glyceraldehyde, intermediates for converting glycerol to lactic acid. Pemmana et al 53 recently reported glycerol oxidation to lactic acid using Ru-V bimetallic catalysts. The findings indicated lactic acid yields of 75.5% and 77.9% at glycerol conversion rates of 98.7% and 97.8% when utilizing activated carbon and TiO 2 as supports, respectively, under mild operating conditions (1 NaOH/glycerol molar ratio, 4400 glycerol/metal molar ratio, 473 K temperature, 5 bar air pressure and 3 h reaction time).…”

Section: Effect Of Catalyst Loading and Compositionmentioning

confidence: 99%

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

Pemmana,

Reddi,

Uppaluri

et al. 2024

React. Chem. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Glycerol molecules of a polyhydroxy nature are multifunctional and can undergo catalytic reactions, such as hydrogenolysis, oxidation, and dehydration, to produce propanediol [3], glyceric acid, glycolic acid [4], dihydroxyacetone [5], glycerol carbonate [6], lactic acid [7][8][9], and calcium lactate [10]. From among them, calcium lactate can be used as a calcium supplement, antimicrobial agent, and in a variety of food additives in food, medicine, and feed fields.…”

Section: Introductionmentioning

confidence: 99%

Direct Synthesis of Calcium Lactate through the Reaction of Glycerol with Calcium Hydroxide Catalyzed by Bimetallic AuCu/SiO2 Nanocatalysts

Li,

Cui,

Wang

et al. 2024

Catalysts

View full text Add to dashboard Cite

Bimetallic AuCu/SiO2 nanosized catalysts were prepared using the wet chemical reduction technique. From among Au0.1–1.5Cu10/SiO2 catalysts, the Au0.5Cu10/SiO2 catalyst gave the highest yield of calcium lactate of 87% at a glycerol conversion of 96% when the reaction of glycerol with calcium hydroxide at a mole ratio of calcium hydroxide to glycerol of 0.8:1 was conducted under an anaerobic atmosphere at 200 °C for 2 h. The interactions between metallic Au0 and Cu0 nanoparticles facilitate calcium lactate formation. The simulation of glycerol consumption rate with an empirical power-function reaction kinetics equation yielded a reaction activation energy of 44.3 kJ∙mol−1, revealing that the catalytic reaction of glycerol with calcium hydroxide to calcium lactate can be conducted by overcoming a mild energy barrier. The synthesis of calcium lactate through the catalytic reaction of glycerol with calcium hydroxide on a bimetallic AuCu/SiO2 nanosized catalyst under a safe anaerobic atmosphere is an alternative to the conventional calcium lactate production technique through the reaction of expensive lactic acid with calcium hydroxide.

show abstract

Selective aerobic-oxidation of glycerol to lactic acid over ruthenium-vanadium bimetallic catalysts

Cited by 4 publications

References 47 publications

Selective Oxidation of Glycerol to Lactic Acid Catalyzed by CuO/Activated Carbon and Reaction Kinetics

Selective Oxidation of Glycerol to Lactic Acid Catalyzed by CuO/Activated Carbon and Reaction Kinetics

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

Direct Synthesis of Calcium Lactate through the Reaction of Glycerol with Calcium Hydroxide Catalyzed by Bimetallic AuCu/SiO2 Nanocatalysts

Contact Info

Product

Resources

About