97/05136 Treatment of wastewater with high concentration of organic matters by catalytic wet oxidation method. II. Study of reaction conditions

Abstract Catalytic wet oxidation of high concentration pharmaceutical wastewater with Fe3+ as catalyst was carried out in a batch reactor. Results showed that the degradation of pharmaceutical wastewater was enhanced significantly by Fe3+. The effects of reaction parameters, such as the catalyst dose, reaction temperature, time, and initial oxygen pressure, were discussed. The chemical oxygen demand (COD) removal increased with the increases of catalyst dose, temperature, time and oxygen supply. With the initial COD 34,000–35,000 mg/L, approximately 70% COD removal can be achieved under the conditions of catalyst 1.0 g and oxygen pressure 1.0 MPa at 250 °C after 60 min. The results of kinetic studies showed that two reaction steps existed in this oxidation process, which followed an apparent first-order rate law. This process provides an effective approach for the pretreatment of high concentration pharmaceutical wastewater.

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The effect of reaction conditions on the apparent deactivation of Ce–Zr mixed oxides for the catalytic wet oxidation of phenol

Catalysis Today ◽

10.1016/j.cattod.2011.03.069 ◽

2012 ◽

Vol 180 (1) ◽

pp. 25-33 ◽

Cited By ~ 22

Author(s):

J.J. Delgado ◽

X. Chen ◽

J.A. Pérez-Omil ◽

J.M. Rodríguez-Izquierdo ◽

M.A. Cauqui

Keyword(s):

Mixed Oxides ◽

Wet Oxidation ◽

Catalytic Wet Oxidation ◽

Reaction Conditions ◽

Oxidation Of Phenol

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Study on Catalyst of Catalytic Wet Oxidation of High-concentration Industrial Organic Wastewater

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.233-235.2994 ◽

2011 ◽

Vol 233-235 ◽

pp. 2994-2999 ◽

Cited By ~ 1

Author(s):

Qing Lin Peng ◽

Jing Zeng

Keyword(s):

Removal Rate ◽

Space Velocity ◽

Preparation Condition ◽

Bubble Columns ◽

Catalytic Wet Oxidation ◽

Air Oxidation ◽

Wet Air Oxidation ◽

High Concentration ◽

Reaction Conditions ◽

Oxidation Technology

A kind of compound catalyst containing the main activate component CuO, the second activate component ZrO2 and electronic promoter La2O3 was prepared. It was applicable to treat with high-concentration dimethyl acetylsuccinate (DMAS) production wastewater with catalytic wet air oxidation technology which was used in continuous bubble columns reactor. In this article the influences of concentration of soaked liquid of every component and the second activate component were studied, and the best preparation condition has been determined. The experimental results indicated that the catalyst of CuO-ZrO2-La2O3/ZSM-5 had a higher activity when handling high-concentration DMAS production wastewater. With this catalyst the CODcr removal rate could get 98.7% while non-catalyst only 35.8％ at the reaction conditions as follows: reaction temperature 240°C, reaction pressure 3.5MPa, liquor space velocity＝2.0 h-1, V (oxygen): V（wastewater）＝250:1 and influent wastewater pH=7.

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Catalytic wet oxidation of high concentration formaldehyde wastewater over Pt/nitrogen-doped activated carbon

Reaction Kinetics Mechanisms and Catalysis ◽

10.1007/s11144-018-1480-3 ◽

2018 ◽

Vol 126 (1) ◽

pp. 547-560 ◽

Cited By ~ 1

Author(s):

Bo Xing ◽

Guo Yang ◽

Honglin Chen ◽

Xingyong Liu

Keyword(s):

Activated Carbon ◽

Wet Oxidation ◽

Catalytic Wet Oxidation ◽

High Concentration ◽

Nitrogen Doped

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Preparation and Application on High-Efficiency Catalyst for Catalytic Wet Oxidation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.6053 ◽

2011 ◽

Vol 383-390 ◽

pp. 6053-6056

Author(s):

Gui Ju Li ◽

Xi Zhang ◽

Li Xiang Zhu

Keyword(s):

Calcination Temperature ◽

High Efficiency ◽

Sol Gel ◽

Preparation Condition ◽

Wet Oxidation ◽

Catalytic Wet Oxidation ◽

Calcination Time ◽

Reaction Conditions ◽

Gel Technique ◽

Biological Methods

The Catalytic Wet Oxidation (CWO) method was investigated to treat phenol cleaning wastewater from chemical container which is difficult dispose with traditional biological methods. In this paper, high-efficiency catalysts were prepared, two methods were used to prepare the catalyst: impregnating, sol-gel. Effects of metal salts concentration, calcination temperature and calcination time on each catalysts performance were explored and optimal catalyst preparation condition was optimized. The results show that the optimum sol-gel condition: Cu / Mn / Ce ratio of 2:2:2, the calcination temperature is 700 °C, calcination time is 5h.; the optimum impregnating condition: Cu / Mn / Ce ratio of 2:2:2, impregnated carrier (AC) of 0.9g/L mixture, the calcination temperature is 300 °C, calcination time is 4h; the sol-gel catalyst has longer service life, the samples prepared by impregnating technique were more active than the samples prepared by sol-gel technique at given reaction conditions.

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Mass Transfer Limited Wet Oxidation in Trickle-Bed Reactor

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19981938 ◽

1998 ◽

Vol 63 (11) ◽

pp. 1938-1944 ◽

Cited By ~ 1

Author(s):

Vratislav Tukač ◽

Jiří Vokál ◽

Jiří Hanika

Keyword(s):

Supported Catalyst ◽

Reaction Rates ◽

Gas Transfer ◽

Wet Oxidation ◽

Reactor Performance ◽

Catalytic Wet Oxidation ◽

Environmental Application ◽

Trickle Bed Reactor ◽

Fine Glass ◽

Trickle Bed

Catalytic activity of CuO-supported catalyst in phenol oxidation, and the influence of reaction conditions, viz. temperature (125-170 °C), oxygen partial pressure (1-7 MPa) and liquid feed (30-760 ml h-1), in the continuous operation using 17.9 mm i.d. trickle-bed reactor is presented. The hydrodynamic impact on the three-phase trickle-bed reactor performance in an environmental application of catalytic wet oxidation was also investigated. The results of trickle-bed operation were strongly influenced by wetting efficiency. An insufficient catalyst wetting can be to compensated by filling the catalyst bed voids by fine glass spheres. In the case of the gas transfer limited reaction, a better wetting of the catalyst can lead to worse reactor performance due to lower reaction rates.

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