The denitration pathway of p-nitrophenol in the hydrogen peroxide catalytic oxidation with an FeIII-resin catalyst

2012 ◽  
Vol 65 (5) ◽  
pp. 845-858 ◽  
Author(s):  
Rey-May Liou
Keyword(s):  
Hydrogen Peroxide ◽  
Liquid Phase ◽  
Kinetic Study ◽  
Catalytic Oxidation ◽  
Degradation Rate ◽  
Strong Influence ◽  
Reaction Conditions ◽  
Resin Catalyst ◽  
Factors Influencing ◽  
Oxidant Concentration

The liquid-phase hydrogen peroxide catalytic oxidation of p-nitrophenol was performed with an FeIII-resin catalyst. The conversion and mineralization of p-nitrophenol was effectively achieved at mild reaction conditions with the FeIII-resin catalyst. It was found that the oxidant concentration, pH, and temperature dominated the degradation rate of p-nitrophenol. The denitration pathway of p-nitrophenol was proposed, in which the concentration of H2O2 and temperature showed strong influence on the conversion of nitrite to nitrate. To study the factors influencing the denitration of p-nitrophenol, a comparable kinetic study was attempted to know the possible denitration pathway of p-nitrophenol. The results of this investigation indicated that denitration was the possible step occurring with the decomposition of p-nitrophenol.

The Basic Investigation on Catalytic Oxidation of Mine Gas to Methanol in Liquid Phase

2014 ◽  
Vol 997 ◽  
pp. 51-56
Author(s):  
Feng Xu ◽  
Chuang Li ◽  
Shao Yang Jia
Keyword(s):  
Acetic Acid ◽  
Liquid Phase ◽  
Acid Solution ◽  
Catalytic Oxidation ◽  
Acetic Acid Solution ◽  
Experimental System ◽  
Gas Composition ◽  
Reaction Conditions ◽  
Mine Gas ◽  
Basic Investigation

A set of experimental system was self-designed and made for liquid phase catalytic oxidation of gas to methanol. It was used to investigate the impacts of catalyst and reaction conditions on catalytic oxidation of gas to methanol in acetic acid solution, and to analyze its reaction mechanism. It has been showed that the yield of the methanol is 1840 μmol under the catalysis of 0.5 g of 0.5% Pd-CuPc/Y and the following conditions: CH3COOH:H2O = 4:1 (v/v), 1000 μmol of p-benzoquinone; reaction time, 3 h; reaction temperature, 150°C; gas composition, 2.5MPa CH4+0.4MPaO2 +0.4MPa N2; in acetic acid solution, catalytic oxidation of mine gas to methanol follows mechanisms of electrophilic substitution and oxidation of reactive oxygen species (ROS).

The Bimetallic Synergistic Effect in Heterogeneous UV/Fenton System for the Treatment of Refractory 6-Nitryl Wastewater

2014 ◽  
Vol 881-883 ◽  
pp. 279-282 ◽  
Author(s):  
Wei Xiong ◽  
De Rong Liu ◽  
Guo Yuan Yuan ◽  
Qi Wei ◽  
Quan Sen Dang ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Wastewater Treatment ◽  
Synergistic Effect ◽  
Molecular Sieve ◽  
Degradation Rate ◽  
Impregnation Method ◽  
Heterogeneous Fenton ◽  
Reaction Conditions ◽  
Optimal Reaction ◽  
Fenton System

Nowadays, ultraviolet (UV) irradiation heterogeneous Fenton-like reactions have widespread used in organic wastewater treatment. In this paper, Fe2+ and Cu2+ were load in Na-Y molecular sieve using impregnation method. Fe-Y, Cu-Y and Fe-Cu-Y catalysts were obtained. The Fe-Cu-Y catalyst showed good performance in the degradation of 6-nitryl wastewater. When the volume of 6-nitryl wastewater is 100 mL, the optimal reaction conditions were found to be 3mL of hydrogen peroxide, 7.5g of catalyst weight, 250W of UV power. Under these conditions, the degradation rate of CODCr can be up to 97.0%.

Catalytic Oxidation of Benzyl Alcohol to Benzaldehyde with Fe/Cu-Cross-Linked Montmorillonite

2011 ◽  
Vol 396-398 ◽  
pp. 1891-1894
Author(s):  
Xue Ju Zhang ◽  
He Song ◽  
Xiang Feng Guo ◽  
Li Hua Jia
Keyword(s):  
Hydrogen Peroxide ◽  
Liquid Phase ◽  
Benzyl Alcohol ◽  
Active Oxygen Species ◽  
Active Oxygen ◽  
Oxygen Species ◽  
Reaction Conditions ◽  
Oxidation Of Benzyl Alcohol ◽  
Excellent Activity ◽  
Phase Oxidation

The Fe/Cu-cross-linked montmorillonite catalysts were synthesized with Linan Na-Mont and characterized by BET, SEM, XRD. Liquid-phase oxidation of benzyl alcohol to benzaldehyde by hydrogen peroxide over Fe/Cu-PILC catalyst in the absence of solvent has been thoroughly investigated. The influence of reaction conditions has also been studied. The results show that Fe/Cu(100)-PILC has excellent activity and reusability in the process. The active oxygen species in the reaction is from the absorbed oxygen of Fe/Cu-PILC.

Reesterification of ethyl acetate by propanol catalysed by glycidyl methacrylate copolymers containing sulphonic acid groups

1981 ◽  
Vol 46 (8) ◽  
pp. 1941-1946 ◽  
Author(s):  
Karel Setínek
Keyword(s):  
Liquid Phase ◽  
Ethyl Acetate ◽  
Kinetic Study ◽  
Gas Phase ◽  
Nonlinear Regression ◽  
Kinetic Data ◽  
Glycidyl Methacrylate ◽  
Kinetic Equations ◽  
Methacrylate Copolymers ◽  
Styrene Divinylbenzene

A series of differently crosslinked macroporous 2,3-epoxypropyl methacrylate-ethylenedimethacrylate copolymers with chemically bonded propylsulphonic acid groups were used as catalysts for the kinetic study of reesterification of ethyl acetate by n-propanol in the liquid phase at 52 °C and in the gas phase at 90 °C. Analysis of kinetic data by the method of nonlinear regression for a series of equations of the Langmuir-Hinshelwood type showed that kinetic equations which describe best the course of the reaction are the same as for the earlier studied sulphonated macroporous styrene-divinylbenzene copolymers. Compared types of catalysts differ, however, in the dependence of their activity on the degree of crosslinking of the copolymer used.

scholarly journals Hydrogen Peroxide Oxidation of Coordinated Thiocyanate Ion in cis- and trans-[Coen2NH3NCS]2+: The Preparation and Properties of trans-[Coen2NH3CN]2+

1973 ◽  
Vol 51 (24) ◽  
pp. 4152-4158 ◽  
Author(s):  
Albert Richard Norris ◽  
James William Lennox Wilson
Keyword(s):  
Hydrogen Peroxide ◽  
Spectral Properties ◽  
Peroxide Oxidation ◽  
Reaction Conditions ◽  
Thiocyanate Ion ◽  
Hydrogen Peroxide Oxidation ◽  
Percent Conversion ◽  
Cis And Trans ◽  
In Cis

The hydrogen peroxide oxidation of thiocyanate ion in cis- and trans-[Coen2NH3NCS]2+ leads to the formation of the corresponding cis- and trans-cyanoammine- and diamminebis(ethylenediamine)cobalt-(III) complexes. The spectral properties of the previously unreported trans-[Coe2NH3CN]2+ are reported and compared to the spectral properties of the cis-isomer.Observations are made concerning the reaction conditions which favor a high percent conversion of trans-[Coen2NH3NCS]2+ to trans-[Coen2NH3CN]2+.

scholarly journals Metal-Organic Frameworks in Oxidation Catalysis with Hydrogen Peroxide

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 283
Author(s):  
Oxana Kholdeeva ◽  
Nataliya Maksimchuk
Keyword(s):  
Hydrogen Peroxide ◽  
Liquid Phase ◽  
Selective Oxidation ◽  
Metal Organic Frameworks ◽  
Short Review ◽  
Catalytic Performance ◽  
Oxidation Catalysis ◽  
Catalyst Stability ◽  
Aqueous Hydrogen Peroxide ◽  
Metal Organic

In recent years, metal–organic frameworks (MOFs) have received increasing attention as selective oxidation catalysts and supports for their construction. In this short review paper, we survey recent findings concerning use of MOFs in heterogeneous liquid-phase selective oxidation catalysis with the green oxidant–aqueous hydrogen peroxide. MOFs having outstanding thermal and chemical stability, such as Cr(III)-based MIL-101, Ti(IV)-based MIL-125, Zr(IV)-based UiO-66(67), Zn(II)-based ZIF-8, and some others, will be in the main focus of this work. The effects of the metal nature and MOF structure on catalytic activity and oxidation selectivity are analyzed and the mechanisms of hydrogen peroxide activation are discussed. In some cases, we also make an attempt to analyze relationships between liquid-phase adsorption properties of MOFs and peculiarities of their catalytic performance. Attempts of using MOFs as supports for construction of single-site catalysts through their modification with heterometals will be also addressed in relation to the use of such catalysts for activation of H2O2. Special attention is given to the critical issues of catalyst stability and reusability. The scope and limitations of MOF catalysts in H2O2-based selective oxidation are discussed.

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