Kinetics Studies for Catalytic Oxidation of Methyl Orange over the Heterogeneous Fe/Beta Catalysts

2013 ◽  
Vol 807-809 ◽  
pp. 361-364
Author(s):  
Fang Guo ◽  
Jun Qiang Xu ◽  
Jun Li
Keyword(s):  
Activation Energy ◽  
Hydrogen Peroxide ◽  
Reaction Mechanism ◽  
Methyl Orange ◽  
Incipient Wetness Impregnation ◽  
Kinetics Studies ◽  
Optimum Reaction ◽  
Catalyst Dosage ◽  
Oxidation Degradation ◽  
Degradation Of Methyl Orange

The Fe/Beta catalysts were prepared by conventional incipient wetness impregnation. The catalysis oxidation degradation of methyl orange was carried out in catalyst and H2O2 process. The results indicated that the catalyst and hydrogen peroxide were more benefit to degradation of methyl orange. The reaction condition was optimized. The optimum reaction process was as follow: iron amount of catalyst was 1.25%, the catalyst dosage and H2O2 concentration was 1 mg/L and 1.5 mg/L, and reaction temperature was 70 °C. The apparent activation energy (65 KJ/mol) was obtained according to the arrhenius formula, which was benefit to study the reaction mechanism.

Studies on the reaction mechanism of Cu/SiC catalytic oxidation for degradation of methyl orange in presence of microwave

2019 ◽  
Vol 79 (6) ◽  
pp. 1164-1173 ◽  
Author(s):  
Guotong Xia ◽  
Jie Sun ◽  
Wenjin Yang ◽  
Gao-Lin Wu ◽  
Weibo Shen
Keyword(s):  
Hydrogen Peroxide ◽  
Methyl Orange ◽  
Hydroxyl Radicals ◽  
Impregnation Method ◽  
First Order ◽  
Pseudo First Order ◽  
Mw Irradiation ◽  
Catalyst Dosage ◽  
Degradation Of Methyl Orange ◽  
H2o2 System

Abstract The removal of methyl orange (MO) in a copper-loaded silicon carbide (Cu/SiC) system under microwave (MW) irradiation was studied. Cu/SiC was synthesized by employing an impregnation method and the effects of parameters such as reaction time, catalyst dosage, hydrogen peroxide (H2O2) dosage, microwave power and pH on the rate of degradation of MO were also studied. The obtained results showed that almost complete degradation was obtained in the presence of Cu/SiC catalyst within 8 min of irradiation when 100 mL of MO solution (20 mg/L), 3 ml/L of H2O2, 2 g/L of catalyst dose, 600 W of MW power, and pH 7 were applied. The Cu-bearing catalyst with H2O2 formed a Fenton-like system and the rate of generation of hydroxyl radicals (·OH) was also accelerated by subjecting to MW. From the kinetic analysis, it is revealed that the degradation of MO using the MW-Cu/SiC-H2O2 system follows the pseudo-first-order.

Preparation of the Modified Mesoporous Beta Materials and its Application in Wet Catalytic Degradation of Methyl Orange

2011 ◽  
Vol 393-395 ◽  
pp. 1381-1384
Author(s):  
Jun Qiang Xu ◽  
Fang Guo ◽  
Jun Li ◽  
Xue Jun Quan
Keyword(s):  
Methyl Orange ◽  
Catalytic Oxidation ◽  
Oxidation Process ◽  
Mental Content ◽  
Transition Metal Catalysts ◽  
High Catalytic Activity ◽  
Incipient Wetness Impregnation ◽  
Experimental Conditions ◽  
Oxidation Degradation ◽  
Degradation Of Methyl Orange

The heterogeneous beta-supported transition metal catalysts were prepared by incipient wetness impregnation. The catalytic oxidation degradation of methyl orange was carried over the heterogeneous catalyst in the peroxide catalytic oxidation process. The pure beta materials showed quick adsorption equilibrium characterization, and the adsorption ratio was only 30%. Compared with the adsorption of the pure beta carrier, the Cu/beta and Fe/beta catalyst could effectively degrade methyl orange with high catalytic activity and easy catalyst separation from the solution using hydrogen peroxide as oxide. The methyl orange removal efficiency could reach 99% in the optimum experimental conditions. The optimal mental content for Cu, Ag, Mn, Fe and Co was 5%, 8%, 0.3%, 1% and 0.3%, respectively.

Phenol Degradation in the System of H2O2/Porous Tourmaline Composite Materials

2010 ◽  
Vol 178 ◽  
pp. 196-201
Author(s):  
Can Li ◽  
Yan Ding ◽  
Jun Ping Meng ◽  
Li Fang Zhao
Keyword(s):  
Activation Energy ◽  
Hydrogen Peroxide ◽  
Removal Rate ◽  
Phenol Degradation ◽  
Good Effect ◽  
Phenol Removal ◽  
Reaction Conditions ◽  
Optimum Reaction ◽  
Initial Phenol Concentration ◽  
Reaction Activation Energy

Porous tourmaline composite material (PTCM) was prepared mainly by schorl and used to catalyze hydrogen peroxide for the removal of phenol. The optimum reaction conditions were determined by testing the phenol removal rate under the conditions of different initial phenol concentration, hydrogen peroxide dosage, PTCM dosage and temperature. The reaction activation energy was calculated to be 32.148KJ/mol, indicating that PTCM showed good effect on catalyzing hydrogen peroxide, phenol could be degraded quickly and the removal rate could reach 97%. The mechanism of the system was the Fenton-like reaction

Copper(ii) coordination polymers: tunable structures and a different activation effect of hydrogen peroxide for the degradation of methyl orange under visible light irradiation

2015 ◽  
Vol 44 (3) ◽  
pp. 1406-1411 ◽  
Author(s):  
Lu Liu ◽  
Dongqing Wu ◽  
Bei Zhao ◽  
Xiao Han ◽  
Jie Wu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Methyl Orange ◽  
Visible Light ◽  
Coordination Polymers ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Activation Effect ◽  
Reaction Condition ◽  
Degradation Of Methyl Orange

By tuning reaction condition of Cu(ii)/btmx system, three Cu(ii) coordination polymers were synthesized. Under visible light, 1–3 display different activation effect of hydrogen peroxide (H2O2) in degrading methyl orange (MO).

Photocatalytic Degradation of Methyl Orange by Cu2O-MoO3

2014 ◽  
Vol 665 ◽  
pp. 483-486 ◽  
Author(s):  
Tao Huang ◽  
Yu Lin Xu ◽  
Chong An Lv ◽  
Shui Jin Yang
Keyword(s):  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Room Temperature ◽  
Degradation Rate ◽  
Solution Phase ◽  
Natural Light ◽  
X Rays ◽  
Reaction Conditions ◽  
Catalyst Dosage ◽  
Degradation Of Methyl Orange

Cu2O-MoO3 composites has been successfully fabricated by solution-phase reducing method at room temperature. All the powders were characterized by X-rays diffraction (XRD) and scanning electron microscopy (SEM), and explored the catalytic activity for the photocatalytic degradation of methyl orange. The effect of different factors on the degradation was investigated. The best reaction conditions were found out. The results demonstrated that initial concentration of methyl orange is 5 mg/L, the pH is 4, the catalyst dosage is 0.38 g/L and the H2O2 is 1.8 mL, the degradation rate of methyl orange is as high as 95.4% after 30 minutes simulated natural light irradiation.

Enhancement of Photocatalytic Oxidation Degradation of Methyl Orange by WO3/TiO2 Photocatalysts under UV Irradiation

2013 ◽  
Vol 341-342 ◽  
pp. 191-194
Author(s):  
Hua Nan Guan
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Scanning Electron Microscopy ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Photocatalytic Oxidation ◽  
Bet Surface Area ◽  
Oxidation Degradation ◽  
Degradation Of Methyl Orange ◽  
Scanning Electron

Nanosized WO3-doped TiO2 photocatalysts were synthesized by a simple hydrothermal method, and characterized by scanning electron microscopy (SEM) and BET surface area analyzer. The photocatalytic activity of undoped TiO2 and WO3 doped TiO2 photocatalysts was evaluated by the photocatalytic oxidation degradation of methyl orange in aqueous solution. The results show that the photocatalytic activity of the WO3 doped TiO2 photocatalyst is much higher than that of undoped TiO2.

scholarly journals Application of Central Composite Design to the Photo Fenton Degradation of Methyl Orange Azo Dye Using Fe-Activated Carbon Catalyst

2020 ◽  
Vol 5 (8) ◽  
pp. 479-485
Author(s):  
Abubakar Muhammad ◽  
Ahmed Lawal Mashi
Keyword(s):  
Activated Carbon ◽  
Methyl Orange ◽  
Central Composite Design ◽  
Correlation Coefficients ◽  
Quadratic Model ◽  
Process Time ◽  
Optimum Reaction ◽  
Methyl Orange Concentration ◽  
Central Composite ◽  
Degradation Of Methyl Orange

Photo-fenton oxidation technique is one of the emerging oxidation processes explored in treatment of organic pollutants in aqueous solutions. This research is focused on utilization of Fe(II) loaded activated carbon and H2O2(aq) in a photofenton process to generate hydroxyl radicals that mineralize methyl orange dyes. Samples of activated carbon were treated with Fe(NO3)2(aq) and characterized using SEM, pHZPC, specific surface area and boehm’s titration. The degradation of methyl orange by the iron loaded activated carbon (Fe-Ac), via photo-Fenton process, was investigated in lab-scale defined by experimental design. Central composite design (CCD) was used to evaluate the effects of the five independent variables considered for the optimization of the oxidative process: time, FeAc dose, methyl orange concentration, pH and H2O2 concentrations. In the optimization, the correlation coefficients (R2 ) for the quadratic model was 0.9941. Optimum reaction conditions were obtained at pH = 3, catalyst dose = 0.1 mg/100ml, H2O2 = 0.62ml, methyl orange concentration = 5mg/l and time = 30 minutes.

scholarly journals Efficient degradation of methyl orange and methylene blue in aqueous solution using a novel Fenton-like catalyst of CuCo-ZIFs

2022 ◽  
Vol 11 (1) ◽  
pp. 71-83
Author(s):  
Thanh H. V. Luong ◽  
Thao H. T. Nguyen ◽  
Binh V. Nguyen ◽  
Nghia K. Nguyen ◽  
Thanh Q. C. Nguyen ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Wastewater Treatment ◽  
Methyl Orange ◽  
Industrial Wastewater ◽  
Zeolitic Imidazolate Framework ◽  
Initial Concentration ◽  
Degradation Reaction ◽  
Catalyst Dosage ◽  
Degradation Of Methyl Orange

Abstract In this study, the synthesized CuCo-zeolitic imidazolate framework (ZIF) catalyst was used to degrade methyl orange (MO) and methylene blue (MB) in water via a novel Fenton-like catalytic reaction. Effects of catalyst dosage, H2O2 concentration, initial concentration of the contaminants, and reaction time were evaluated. The results showed that MO and MB decomposition efficiencies were highly influenced by CuCo-ZIF concentration. The presence of H2O2 accelerated the degradation reaction of both MO and MB. Although it took 100 min to complete the removal of MB, it was 60 min for MO. At concentrations of MO and MB lower than 40 mg·L−1, the catalyst showed an almost complete degradation. The CuCo-ZIF catalyst presented a good recyclability with more than 90% removal of MO and MB after four times and five times reuse, respectively. These results demonstrated that MO and MB were efficiently degraded by a Fenton-like catalyst of CuCo-ZIFs and its potential in industrial wastewater treatment.

Photocatalytic Degradation of Methyl Orange Dye with Synthesized Chitosan/Fe2O3Nanocomposite and its Isotherm Studies.

2020 ◽  
Vol 16 ◽  
Author(s):  
Nimisha Jadon ◽  
Gulzar Ahmad Bhat ◽  
Manoharmayum Vishwanath Sharma ◽  
Harendra Kumar Sharma
Keyword(s):  
Methyl Orange ◽  
Dye Degradation ◽  
Dose Effect ◽  
X Ray Diffraction ◽  
Methyl Orange Degradation ◽  
Transmission Electron ◽  
Fourier Transformation Infrared Spectroscopy ◽  
Vis Spectroscopy ◽  
Methyl Orange Dye ◽  
Degradation Of Methyl Orange

Background: The study focuses on the synthesis of chitosan/ Fe2O3 nanocomposite, its characterization and application in methyl orange dye degradation. Methods: The synthesized chitosan/ Fe2O3 nanocomposite was characterized with Powder X-Ray Diffraction, Fourier Transformation Infrared Spectroscopy (FTIR), Transmission Electron Microscopy (TEM) and UV-Vis Spectroscopy. Results: The characterization showed that the Fe2O3nanoparticles were embedded in the polymer matrix of chitosan. The size of the Fe2O3nanoparticles were less than 10nm and the crystallite size was 1.22 nm.The synthesized chitosan/ Fe2O3nanocomposite was tested for methyl orange degradation using different parameters such as effect of contact time, effect of dose, effect of concentration and effect of pH for the degradation of methyl orange dye in aqueous solution.The Fruendlich, Langmuir and Temkin isotherm studies were also conducted for adsoption of methyl orange on Chitosan/ Fe2O3nanocomposite. Conclusion: The study indicated that the synthesized chitosan/Fe2O3 nanocomposite had the potential of degrading methyl orange dye up to 75.04% under the set condition in this experiment which indicate that Chitosan/ Fe2O3 nanocomposite is a viable option that can be used for the degradation of methyl orange dye.

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