Kinetics of Wet Air Oxidation of Glyoxalic Acid and Oxalic Acid

Shende, Rajesh V.; Mahajani, Vijaykumar V.

doi:10.1021/ie00036a030

Cited by 90 publications

(53 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This step showed high dependency on oxygen, giving a 0.80 order. Shende and Mahajani [22], using a homogeneous solution of CuSO 4 as catalyst, also report dependence on oxygen, although with a significantly lower exponent, 0.321. The calculated order indicates that oxalic acid is directly oxidised to give carbon dioxide, rather than undergoing a decarboxylation to yield formic acid.…”

Section: Model Parametersmentioning

confidence: 95%

“…Only a few attempts have been made to give more detailed schemes based on lumping of partial oxidation products [11,18]. As well, the oxidation kinetics of low molecular weight acids have been investigated [22][23][24][25][26] but, though degradation schemes are proposed, only kinetic analysis for mother compound disappearance or lumped TOC reduction is given. However, the kinetic analysis accounting for all the intermediates is of interest from an environmental point of view, as some partial oxidation by-products are as toxic as phenol itself.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Kinetic modelling of catalytic wet air oxidation of phenol by simulated annealing

Eftaxias

Font

Fortuny

et al. 2001

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

Section: Model Parametersmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Kinetic modelling of catalytic wet air oxidation of phenol by simulated annealing

Eftaxias

Font

Fortuny

et al. 2001

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

“…Oxalic acid and phenol are commonly selected as probe species, since they represent well a refractory short chain carboxylic acid end-product in AOPs (in the case of oxalic acid) [62][63][64] and a more complex molecule which is also an organic pollutant commonly found in industrial effluents (phenol) [38]. In some COZ cases, authors also studied antibiotics (as erythromycin [65] and sulfamethoxazole [66]), lipid regulators (as bezafribate) [67], and herbicides (as atrazine) [68,69].…”

Section: Environmental Catalytic Applicationsmentioning

confidence: 99%

Tuning CNT Properties for Metal-Free Environmental Catalytic Applications

Rocha

Soares

Figueiredo

et al. 2016

View full text Add to dashboard Cite

Abstract:The application of carbon nanotubes (CNTs) as metal-free catalysts is a novel approach for heterogeneous liquid phase catalytic systems. Textural and chemical modifications by liquid/gas phase or mechanical treatments, as well as solid state reactions, were successfully applied to obtain carbon nanotubes with different surface functionalities. Oxygen, nitrogen, and sulfur are the most common heteroatoms introduced on the carbon surface. This short-review highlights different routes used to develop metal-free carbon nanotube catalysts with enhanced properties for Advanced Oxidation Processes.

show abstract

“…On the other hand, CuSO 4 is a very good catalyst for WO mineralization of acetic acid 9 and oxalic acid. 10 We, therefore, present here studies of the catalytic treatment of an aqueous aniline stream by a hybrid combination of the Fenton process followed by WO.…”

Section: Introductionmentioning

confidence: 99%

Studies in mineralization of aqueous aniline using Fenton and wet oxidation (FENTWO) as a hybrid process

Gunale

Mahajani

2006

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

A hybrid process for mineralization of aqueous aniline using Fenton and wet oxidation (FENTWO) is studied. It is important to have maximum conversion of 'N' atoms from the waste to N 2 . The conversion of input 'N' atoms in aniline to N 2 was 15% during wet oxidation without the Fenton process and was improved to 50% with the Fenton process. Therefore, a hybrid process of Fenton followed by wet oxidation was studied for mineralization of the aqueous aniline stream. The parameters for the Fenton process were optimized (pH, catalyst, H 2 O 2 to catalyst (FeSO 4 ) ratio, quantity of H 2 O 2 ). The waste obtained after the Fenton process was then treated by wet oxidation for mineralization by having homogeneous CuSO 4 as the catalyst by keeping FeSO 4 therein. This combined catalyst was found to be more effective for the degradation of the intermediates formed in the Fenton process. Wet oxidation (WO) was studied in the temperature range 473-513 K and the oxygen partial pressure range 0.345-1.38 MPa at pH 6.5. The kinetic data was modeled using a power law rate expression in terms of chemical oxygen demand (COD). The optimum temperature for formation of more N 2 gas was found to be 493 K. The treated waste stream was found to contain oxalic acid using HPLC, and NH 4 + , NO 3 − and NO 2 − ions using ion chromatography analysis.

show abstract

Kinetics of Wet Air Oxidation of Glyoxalic Acid and Oxalic Acid

Cited by 90 publications

References 7 publications

Kinetic modelling of catalytic wet air oxidation of phenol by simulated annealing

Kinetic modelling of catalytic wet air oxidation of phenol by simulated annealing

Tuning CNT Properties for Metal-Free Environmental Catalytic Applications

Studies in mineralization of aqueous aniline using Fenton and wet oxidation (FENTWO) as a hybrid process

Contact Info

Product

Resources

About