Development of Fe2O3-CeO2-TiO2/γ-Al2O3 as catalyst for catalytic wet air oxidation of methyl orange azo dye under room condition

2007 ◽  
Vol 72 (3-4) ◽  
pp. 205-211 ◽  
Author(s):  
Yan Liu ◽  
Dezhi Sun
Keyword(s):  
Methyl Orange ◽  
Azo Dye ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Room Condition

scholarly journals Impact of Precipitants on the Structure and Properties of Fe-Co-Ce Composite Catalysts

2016 ◽  
Vol 2016 ◽  
pp. 1-8
Author(s):  
Yongli Zhang ◽  
Shujuan Dai ◽  
Yanbo Zhou ◽  
Kai Lin
Keyword(s):  
Particle Size ◽  
Methyl Orange ◽  
Removal Efficiency ◽  
Cod Removal ◽  
Catalytic Wet Air Oxidation ◽  
Structure And Properties ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Composite Catalysts ◽  
Cod Removal Efficiency

Fe-Co-Ce composite catalysts were prepared by coprecipitation method using CO(NH2)2, NaOH, NH4HCO3, and NH3·H2O as precipitant agents. The effects of the precipitant agents on the physicochemical properties of the Fe-Co-Ce based catalysts were investigated by SEM, TEM, BET, TG-DTA, and XRD. It was found that the precipitant agents remarkably influenced the morphology and particle size of the catalysts and affected the COD removal efficiency, decolorization rate, and pH of methyl orange for catalytic wet air oxidation (CWAO). The specific surface area of the Fe-Co-Ce composite catalysts successively decreased in the order of NH3·H2O, NH4HCO3, NaOH, and CO(NH2)2, which correlated to an increasing particle size that increased for each catalyst. For the CWAO of a methyl orange aqueous solutions, the effects of precipitant agents NH3·H2O and NaOH were superior to those of CO(NH2)2and NH4HCO3. The catalyst prepared using NH3·H2O as the precipitant agent was mostly composed of Fe2O3, CoO, and CeO2. The COD removal efficiency of methyl orange aqueous solution for NH3·H2O reached 92.9% in the catalytic wet air oxidation. Such a catalytic property was maintained for six runs.

Catalytic wet air oxidation of dye pollutants by polyoxomolybdate nanotubes under room condition

2009 ◽  
Vol 86 (3-4) ◽  
pp. 182-189 ◽  
Author(s):  
Yang Zhang ◽  
Dongliu Li ◽  
Yang Chen ◽  
Xiaohong Wang ◽  
Shengtian Wang
Keyword(s):  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Dye Pollutants ◽  
Room Condition

scholarly journals Fabrication of Core-Shell Structural SiO2@H3[PM12O40] Material and Its Catalytic Activity

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Xin Yang ◽  
Junhai Wang ◽  
Qi Zhang ◽  
Xu Wang ◽  
Linlin Xu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalysts ◽  
Sol Gel ◽  
Operating Conditions ◽  
Core Shell ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Heterogeneous Catalytic ◽  
Room Condition

Through a natural tree grain template and sol-gel technology, the heterogeneous catalytic materials based on polyoxometalate compounds H3[PM12O40] encapsulating SiO2: SiO2@H3[PM12O40] (SiO2@PM12, M = W, Mo) with core-shell structure had been prepared. The structure and morphology of the core-shell microspheres were characterized by the XRD, IR spectroscopy, UV-Vis absorbance, and SEM. These microsphere materials can be used as heterogeneous catalysts with high activity and stability for catalytic wet air oxidation of pollutant dyes safranine T (ST) at room condition. The results show that the catalysts have excellent catalytic activity in treatment of wastewater containing 10 mg/L ST, and 94% of color can be removed within 60 min. Under different cycling runs, it is shown that the catalysts are stable under such operating conditions and the leaching tests show negligible leaching effect owing to the lesser dissolution.

Electro-assisted catalytic wet air oxidation of organic pollutants on a MnO@C/GF anode under room condition

2019 ◽  
Vol 256 ◽  
pp. 117822 ◽  
Author(s):  
Lin-Feng Zhai ◽  
Ming-Feng Duan ◽  
Meng-Xia Qiao ◽  
Min Sun ◽  
Shaobin Wang
Keyword(s):  
Organic Pollutants ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Room Condition

Synthesis of ZnMoO4/Na2Mo4O13/α-MoO3 Hybrid Catalyst for the Catalytic Wet Air Oxidation of Dye Under Room Condition

2014 ◽  
Vol 6 (10) ◽  
pp. 2159-2164 ◽  
Author(s):  
Zhang Zhang ◽  
Ruoyan Yang ◽  
Ahmad Umar ◽  
Yanshan Gao ◽  
Junya Wang ◽  
...  
Keyword(s):  
Catalytic Wet Air Oxidation ◽  
Hybrid Catalyst ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Room Condition

KBrO3 Catalyzed Wet Air Oxidation of C.I. Reactive Brilliant Red K-2G

2012 ◽  
Vol 512-515 ◽  
pp. 2283-2286
Author(s):  
Xue Wei Dong
Keyword(s):  
Oxygen Partial Pressure ◽  
Partial Pressure ◽  
Reaction Temperature ◽  
Azo Dye ◽  
Removal Rate ◽  
Catalytic Wet Air Oxidation ◽  
Optimal Conditions ◽  
Air Oxidation ◽  
Wet Air Oxidation ◽  
Catalyst Dosage

The effect of KBrO3 on catalytic wet air oxidation to be used in azo dye C.I. Reactive Brilliant Red K-2G decolorization under different conditions is evaluated. The reaction temperature, oxygen partial pressure, pH and catalyst dosage were studied. The optimal conditions of applying KBrO3/O2 system were: reaction temperature 150°C, oxygen partial preSubscript textssure 1.0 Mpa, pH 4 and Reactive Brilliant Red K-2G: KBrO3 (mole ratio) 1:0.5. Under the optimal conditions, the color removal rate was 98.9%. KBrO3/O2 system was efficient in azo dye Reactive Brilliant Red K-2G decolorrization.

Catalytic Wet Air Oxidation of Methyl Orange Onto Pt and Pt–TiO2

2016 ◽  
Vol 16 (9) ◽  
pp. 10040-10047 ◽  
Author(s):  
Adriano C Rabelo ◽  
Adriane V Rosario ◽  
Marília A Trapp ◽  
Edson Rodrigues Filho ◽  
Moacir Forim ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Catalytic Wet Air Oxidation ◽  
Air Oxidation ◽  
Wet Air Oxidation
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