Heterogeneous catalytic wet air oxidation of refractory organic pollutants in industrial wastewaters: A review

Molybdovanadophosphate-based surfactant encapsulated heteropolyanion with multi-lamellar nano-structure for ambient catalytic wet air oxidation of BPA.

Download Full-text

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

Journal of Nanomaterials ◽

10.1155/2014/835931 ◽

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.

Download Full-text

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

Applied Catalysis B Environmental ◽

10.1016/j.apcatb.2019.117822 ◽

2019 ◽

Vol 256 ◽

pp. 117822 ◽

Cited By ~ 10

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

Download Full-text

Heterogeneous Catalytic Supercritical Water Oxidation of Refractory Organic Pollutants in Industrial Wastewaters

Journal of Advanced Oxidation Technologies ◽

10.1515/jaots-2012-0115 ◽

2012 ◽

Vol 15 (1) ◽

Cited By ~ 1

Author(s):

Jing Guolin ◽

Luan Mingming ◽

Chen Tingting

Keyword(s):

Organic Pollutants ◽

Supercritical Water ◽

Water Oxidation ◽

Heterogeneous Catalysts ◽

Advanced Oxidation Process ◽

Supercritical Water Oxidation ◽

Industrial Wastewaters ◽

Heterogeneous Catalytic ◽

Refractory Organic Pollutants ◽

Catalytic Performances

AbstractCatalytic supercritical water oxidation (CSCWO) is one of the most environmental-friendly advanced oxidation process. It makes a promising technology for the treatment of refractory organic pollutants in industrial wastewaters. Various heterogeneous catalysts including metal oxides have been extensively studied to enhance the efficiency of CSCWO. The present review is concerned about the literatures published in this regard. Phenolics, carboxylic acids and N-containing compounds were taken as model pollutants in most cases, and oxides of Cr, Mn, Co, V, Cu, Zn, Al, Ti and Ce were applied as heterogeneous catalysts. Reports on their characterization and catalytic performances for the CSCWO of aqueous pollutants are reviewed. Discussions are also made on the reaction mechanisms and kinetics proposed for heterogeneous CSCWO.

Download Full-text

Carbon materials and catalytic wet air oxidation of organic pollutants in wastewater

Topics in Catalysis ◽

10.1007/s11244-005-2497-1 ◽

2005 ◽

Vol 33 (1-4) ◽

pp. 3-50 ◽

Cited By ~ 124

Author(s):

F. Stüber ◽

J. Font ◽

A. Fortuny ◽

C. Bengoa ◽

A. Eftaxias ◽

...

Keyword(s):

Organic Pollutants ◽

Carbon Materials ◽

Catalytic Wet Air Oxidation ◽

Air Oxidation ◽

Wet Air Oxidation

Download Full-text

Kinetics Study on Heterogeneous Catalytic Wet Air Oxidation of Phenol using Copper/Activated Carbon Catalyst

International Journal of Chemical Reactor Engineering ◽

10.2202/1542-6580.1282 ◽

2005 ◽

Vol 3 (1) ◽

Cited By ~ 6

Author(s):

Qiang Wu ◽

Xijun Hu ◽

Po Lock Yue

Keyword(s):

Mass Transfer ◽

Activated Carbon ◽

Molecular Form ◽

Reaction System ◽

Mathematic Model ◽

Catalytic Wet Air Oxidation ◽

Air Oxidation ◽

Wet Air Oxidation ◽

Mass Transfer Effect ◽

Heterogeneous Catalytic

Heterogeneous kinetics of catalytic wet air oxidation (CWAO) of phenol was studied using copper supported on activated carbon as the catalyst and oxygen as the oxidant. Both mass transfer effect and deactivation of catalyst can affect the kinetics measurement. To eliminate the mass transfer barriers, the study was conducted in a stirred tank batch reactor using catalysts of very small particle size. In order to prevent the catalyst deactivation caused by copper leaching from the support, saturated pH buffer solution was added into the reaction system and the initial phenol and catalyst concentrations were reduced. A mathematic model was proposed following the Langmuir-Hinshelwood mechanism to simulate the reaction kinetics. It is believed through simulation that the dissolved oxygen is adsorbed by the catalyst in molecular form which subsequently starts to degrade phenol on the catalyst surface. Both reaction rate constant and activation energy were determined for a temperature range of 140 - 160 oC and an oxygen partial pressure range of 0.4 - 1.6 MPa. The proposed mechanism and kinetic model were found to be in good agreement with experimental results.

Download Full-text