scholarly journals Study on phenol oxidation with H2O2

2005 ◽  
Vol 70 (10) ◽  
pp. 1137-1146 ◽  
Author(s):  
Jin Zhang ◽  
Ying Tang ◽  
Jia-Qing Xie ◽  
Jian-Zhang Li ◽  
Wei Zeng ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Schiff Base ◽  
Catalytic Oxidation ◽  
Reaction Rate ◽  
Mathematic Model ◽  
Phenol Oxidation ◽  
Oxidation Of Phenol

Two new ligands, 1-hydroxy-5- 4-(2-hydroxybenzylideneamino)pheno - xy -3-oxapentane (HL1) and 1-methoxy-5- 4-(2-hydroxybenzylideneamino)pheno - xy -3-oxapentane (HL2), and their Mn(III) complexes were synthesized and characterized. The two new Schiff base Mn(III) complexes were used to mimic peroxidase in the oxidation of phenol by hydrogen peroxide. The effect of the mole ratio of H2O2 to the complex, pH and temperature on the reaction rate was investigated. The mechanism of the catalytic oxidation is discussed. A kinetic mathematic model for the oxidation of phenol catalyzed by Schiff base Mn(III) complexes has been constructed.

A facile strategy for enhancing FeCu bimetallic promotion for catalytic phenol oxidation

2015 ◽  
Vol 5 (6) ◽  
pp. 3159-3165 ◽  
Author(s):  
Lei Luo ◽  
Chengyi Dai ◽  
Anfeng Zhang ◽  
Junhu Wang ◽  
Min Liu ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Alkaline Treatment ◽  
Phenol Oxidation ◽  
Nanoparticle Size ◽  
Oxidation Of Phenol ◽  
Catalytic Oxidation Of Phenol

The mesoporous ZSM-5 zeolite obtained from alkaline treatment was found to be a superior support of bimetallic FeCu, minimizing the nanoparticle size, enhancing the bimetallic interaction, and promoting catalytic oxidation of phenol.

Hydroxylation of Phenol over Ti-MCM-41 and TS-1

1995 ◽  
Vol 60 (3) ◽  
pp. 451-456 ◽  
Author(s):  
Kornelia Kulawik ◽  
Günter Schulz-Ekloff ◽  
Jiří Rathouský ◽  
Arnošt Zukal ◽  
Jiří Had
Keyword(s):  
Hydrogen Peroxide ◽  
Reaction Rate ◽  
Hydroxylation Of Phenol ◽  
Oxidation Of Phenol ◽  
Mcm 41

In the oxidation of phenol by hydrogen peroxide over titanium containing MCM-41 materials, practically only para isomers are formed. The exclusive para selectivity is proposed to be due to the different strength of adsorption for the para and ortho isomers influencing the overall reaction rate or the faster polymerization of the ortho product. The former mechanism is more probable.

An Efficient Solvent-Free Catalytic Oxidation of Sulfides to Sulfoxides with Hydrogen Peroxide Catalyzed by a Binaphthyl-Bridged Schiff Base Titanium Complex.

ChemInform ◽  
2007 ◽  
Vol 38 (1) ◽  
Author(s):  
Margherita De Rosa ◽  
Marina Lamberti ◽  
Claudio Pellecchia ◽  
Arrigo Scettri ◽  
Rosaria Villano ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Schiff Base ◽  
Catalytic Oxidation ◽  
Solvent Free ◽  
Titanium Complex ◽  
Oxidation Of Sulfides

An efficient solvent free catalytic oxidation of sulfides to sulfoxides with hydrogen peroxide catalyzed by a binaphthyl-bridged Schiff base titanium complex

2006 ◽  
Vol 47 (40) ◽  
pp. 7233-7235 ◽  
Author(s):  
Margherita De Rosa ◽  
Marina Lamberti ◽  
Claudio Pellecchia ◽  
Arrigo Scettri ◽  
Rosaria Villano ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Schiff Base ◽  
Catalytic Oxidation ◽  
Solvent Free ◽  
Titanium Complex ◽  
Oxidation Of Sulfides

scholarly journals Phenol degradation by combined photochemical-biological wastewater treatment system : kinetic modeling and optimization

2021 ◽  
Author(s):  
Maryam Edalatmanesh
Keyword(s):  
Hydrogen Peroxide ◽  
Energy Consumption ◽  
Retention Time ◽  
Rate Constants ◽  
Reaction Rate ◽  
Electrical Energy ◽  
Electrical Energy Consumption ◽  
Total Cost ◽  
Reaction Rate Constants ◽  
Oxidation Of Phenol

A dynamic kinetic model, for the oxidation of phenol in water by UV/H₂O₂ system is developed. The model is based on elementary chemical and photochemical reactions, initiated by the photolysis of hydrogen peroxide into hydroxyl radical. Numerical values of chemical reaction rate constants and photochemical parameters are taken from literature. The model is validated with data on the oxidation of phenol in the simulated and the actual UV/H₂O₂ system. Using experimental data from literature, kinetic rate constants for the reactions involving phenol oxidation intermediates, catechol and hydroquinone, are estimated. The rate constants for the reactions, where phenol oxidized to catechol and hyroquinone by hydrogen peroxide are 9x10⁸ and 2x10⁸ s⁻¹ M⁻¹, respectively. The reaction rate constants for oxidations of catechol and hydroquinone by hydrogen peroxide are found to be 9x10⁸ and 8x10⁷ s⁻¹ M⁻¹, respectively. Phenol biodegradation is best represented by a two-step Haldane model. Both photochemical and biological models are coupled together to give one single chemical-biological system. The photochemical-biological process is optimized for the retention time, electrical energy consumption, and cost. The optimization approach is solved using the Successive Quadratic Programming (SQP) method. The least retention time for this system is determined to be 99h and the optimal electrical energy consumption occurs at a photochemical retention time of 15h and a biological retention time of 92h. Calculations on the total cost for different retention times show that the incurred cost by the photochemical unit is considerably higher than that by the biological unit. However, the minimum total cost is evaluated to occur at 15.5h of photochemical retention time and 90h of biological retention time.

scholarly journals Phenol degradation by combined photochemical-biological wastewater treatment system : kinetic modeling and optimization

2021 ◽  
Author(s):  
Maryam Edalatmanesh
Keyword(s):  
Hydrogen Peroxide ◽  
Energy Consumption ◽  
Retention Time ◽  
Rate Constants ◽  
Reaction Rate ◽  
Electrical Energy ◽  
Electrical Energy Consumption ◽  
Total Cost ◽  
Reaction Rate Constants ◽  
Oxidation Of Phenol

A dynamic kinetic model, for the oxidation of phenol in water by UV/H₂O₂ system is developed. The model is based on elementary chemical and photochemical reactions, initiated by the photolysis of hydrogen peroxide into hydroxyl radical. Numerical values of chemical reaction rate constants and photochemical parameters are taken from literature. The model is validated with data on the oxidation of phenol in the simulated and the actual UV/H₂O₂ system. Using experimental data from literature, kinetic rate constants for the reactions involving phenol oxidation intermediates, catechol and hydroquinone, are estimated. The rate constants for the reactions, where phenol oxidized to catechol and hyroquinone by hydrogen peroxide are 9x10⁸ and 2x10⁸ s⁻¹ M⁻¹, respectively. The reaction rate constants for oxidations of catechol and hydroquinone by hydrogen peroxide are found to be 9x10⁸ and 8x10⁷ s⁻¹ M⁻¹, respectively. Phenol biodegradation is best represented by a two-step Haldane model. Both photochemical and biological models are coupled together to give one single chemical-biological system. The photochemical-biological process is optimized for the retention time, electrical energy consumption, and cost. The optimization approach is solved using the Successive Quadratic Programming (SQP) method. The least retention time for this system is determined to be 99h and the optimal electrical energy consumption occurs at a photochemical retention time of 15h and a biological retention time of 92h. Calculations on the total cost for different retention times show that the incurred cost by the photochemical unit is considerably higher than that by the biological unit. However, the minimum total cost is evaluated to occur at 15.5h of photochemical retention time and 90h of biological retention time.

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