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A doped ozone catalyst based on structured honeycomb ceramic carbon carrier for advanced treatment of industrial wastewater and its preparation method

A technology of honeycomb ceramics and advanced treatment, which is applied in catalyst activation/preparation, physical/chemical process catalysts, water/sewage treatment, etc. It can solve the problems of poor mass transfer efficiency and ozone utilization efficiency, easy damage and loss, and mechanical strength of honeycomb activated carbon catalysts. Defects and other problems, to achieve the effect of ensuring catalytic performance and reusability, avoiding accumulation, and high mechanical strength

Active Publication Date: 2017-10-24
JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the relatively poor mass transfer efficiency and ozone utilization efficiency of the existing granular catalysts for the advanced treatment of industrial wastewater to organic pollutants in the wastewater, while the mechanical strength of the honeycomb activated carbon catalyst has defects and is easily damaged and lost. Provided is a doped ozone catalyst based on regular honeycomb ceramic carbon carrier for advanced treatment of industrial wastewater and its preparation method

Method used

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  • A doped ozone catalyst based on structured honeycomb ceramic carbon carrier for advanced treatment of industrial wastewater and its preparation method

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preparation example Construction

[0037] The above-mentioned doped type ozone catalyst of the present invention is based on the Al 2 o 3 The powder is mixed with wood flour in a specific ratio, with hydroxypropyl methylcellulose, polyethylene glycol, dysprosium nitrate, and molybdenum nitrate aqueous solution as forming aids, after kneading paste, mud refining, extrusion molding, drying, vacuum sintering, steaming It is prepared by activation and other processes, and its flow chart is as follows figure 1 Shown, the concrete steps of the preparation method of this doping type ozone catalyst are:

[0038] (1)Al 2 o 3 Pre-burning of powder: Al 2 o 3 The powder is baked at 1400°C for 4 to 8 hours to transform it into α-Al 2 o 3 , so that the volume shrinkage and expansion during the sintering process can be effectively controlled, the cracking during the sintering process can be reduced, and the sintering yield can be improved;

[0039] (2) Powder grinding: the pre-fired Al 2 o 3 The powder is ground to ...

Embodiment 1

[0048] Will Al 2 o 3 The powder is calcined at 1400°C for 8 hours to convert all of it into α-Al 2 o 3 , so as to control the volume shrinkage and expansion during the sintering process, reduce the cracking during the sintering process, and improve the sintering yield; the pre-fired Al 2 o 3 The powder is ground into a uniform powder with an average particle size of about 150 mesh for later use. Dry wood powder with an average particle size of about 150 mesh in an oven at 60°C for 6 hours for later use; mix hydroxypropyl methylcellulose, polyethylene glycol, dysprosium nitrate, molybdenum nitrate and water to prepare a molding aid solution, wherein The mass concentration of hydroxypropyl methylcellulose is 3.5%, the mass concentration of polyethylene glycol is 6%, and the mass concentration of dysprosium nitrate and molybdenum nitrate is 50%; the dried wood powder and Al 2 o 3 The powder is mixed according to the mass ratio of 1:30 to obtain a mixed powder, and a 4% mass...

Embodiment 2

[0051] Will Al 2 o 3The powder is calcined at 1400°C for 8 hours to convert all of it into α-Al 2 o 3 , so as to control the volume shrinkage and expansion during the sintering process, reduce the cracking during the sintering process, and improve the sintering yield; the pre-fired Al 2 o 3 The powder is ground into a uniform powder with an average particle size of about 500 mesh for later use. Dry wood powder with an average particle size of about 500 mesh in an oven at 60°C for 6 hours for later use; mix hydroxypropyl methylcellulose, polyethylene glycol, dysprosium nitrate, molybdenum nitrate and water to prepare a molding aid solution, wherein The concentration of hydroxypropyl methylcellulose is 3.5%, the concentration of polyethylene glycol is 6%, and the concentrations of dysprosium nitrate and molybdenum nitrate are 50% respectively; the dried wood powder and Al 2 o 3 The powder is mixed according to the mass ratio of 1:30, and 4% of the mass proportion of formin...

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Abstract

The invention discloses a doped ozone catalyst based on a regular honeycomb ceramic carbon carrier for advanced treatment of industrial wastewater and a preparation method thereof. This structured ozone catalyst uses pre-burned and ground 150-500 mesh Al2O3 powder and 150-500 mesh wood powder mixed in a specific ratio, with hydroxypropyl methylcellulose, polyethylene glycol and dysprosium nitrate and molybdenum nitrate aqueous solutions as the ingredients. Molding additives are prepared through paste mixing, mud refining, extrusion molding, drying, vacuum sintering, steam activation and other processes. This catalyst can strengthen the enrichment and mass transfer of organic pollutants and ozone in water during the ozone catalytic oxidation process, and improve the catalytic efficiency. At the same time, it uses alumina ceramics as the skeleton to solve the problem of damage and loss of activated carbon due to the decrease in material strength during the catalytic oxidation process. . The structured ozone catalyst of the present invention has high treatment efficiency, low operating cost, and convenient loading and maintenance. It can be used for advanced treatment of wastewater to strengthen the ozone oxidation effect and improve the decolorization rate and COD removal rate.

Description

technical field [0001] The invention belongs to the technical field of catalysts and preparation methods thereof, and in particular relates to a doped ozone catalyst based on a regular honeycomb ceramic carbon carrier for advanced treatment of industrial wastewater and a preparation method thereof. Background technique [0002] Industrial wastewater refers to wastewater such as process wastewater, cooling water, exhaust gas washing water, equipment and site washing water discharged in industrial production. Industrial wastewater often contains more nitrogen heterocycles, phosphorus heterocycles, chlorinated benzenes, nitrobenzenes, phenols, polycyclic aromatic hydrocarbons and saturated alkanes. However, due to the stable structure of the above-mentioned types of substances, most of which are hydrophobic and biologically toxic, this type of wastewater still has high COD, chroma, and toxic and harmful components after biochemical treatment, and it is difficult to reach the st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/28C02F1/72C02F1/78
CPCC02F1/722C02F1/725C02F1/78B01J23/28B01J37/08B01J35/56
Inventor 徐军武倩涂勇张耀辉唐敏李军陈勇
Owner JIANGSU PROVINCIAL ACAD OF ENVIRONMENTAL SCI
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