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Noble metal catalyst for catalyzing wet oxidation industrial wastewater, and preparation method and application thereof

A precious metal catalyst, a technology for catalytic wet oxidation, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as unfavorable industrial production and complex process routes, Achieve the effect of reducing temperature and pressure, simple preparation process route and low preparation cost

Active Publication Date: 2018-02-13
ZHEJIANG QICAI ECO TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] So far, most of the published wet oxidation catalyst preparation methods have complicated process routes, which are not conducive to industrial production

Method used

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  • Noble metal catalyst for catalyzing wet oxidation industrial wastewater, and preparation method and application thereof
  • Noble metal catalyst for catalyzing wet oxidation industrial wastewater, and preparation method and application thereof
  • Noble metal catalyst for catalyzing wet oxidation industrial wastewater, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 7

[0050] Simulated wastewater application test: Prepare triethylamine simulated wastewater with TOC=5300 mg / L, adjust wastewater pH=5~6 with acid, take a certain amount of supported precious metal catalyst in fixed bed reaction tube, and inject air until the total pressure is 5 MPa, heat and maintain the temperature in the reaction tube at 220°C, and the reaction space velocity is 1 h -1 , during the reaction process, waste water and air continue to enter the reaction system in a certain proportion, and the specific results of the treatment of the catalyst described in Examples 1 to 6 are shown in figure 1 .

Embodiment 8

[0052] Actual industrial wastewater application test: Take a certain dye company’s industrial production wastewater, COD=35800 mg / L, TOC=14600mg / L, take a certain amount of supported noble metal catalyst in the fixed bed reaction tube, and feed air until the total pressure is 5 MPa , heat and maintain the temperature in the reaction tube at 220 °C, and the reaction space velocity is 1 h -1 , during the reaction process, waste water and air continue to enter the reaction system in a certain proportion, and the specific results of the catalyst described in Examples 1 to 6 are shown in figure 2 .

Embodiment 9

[0054] Actual industrial wastewater application test: Take the industrial production wastewater of a dyestuff company, COD=27600 mg / L, TOC=10500mg / L, take a certain amount of supported precious metal catalyst in the fixed bed reaction tube, and feed air until the total pressure is 3 MPa , heating and maintaining the temperature in the reaction tube at 180 °C, and the reaction space velocity at 2 h -1 , during the reaction process, waste water and air continue to enter the reaction system in a certain proportion, and the specific results of the treatment of the catalyst described in Examples 1 to 6 are shown in image 3 .

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Abstract

The invention discloses a noble metal catalyst for catalyzing wet oxidation industrial wastewater, and a preparation method and application thereof, and belongs to the technical fields of an environmental functional material and wastewater treatment. The catalyst is prepared by loading active components by a carrier, wherein the carrier is a mixture of CeO2 and TiO2; and the active components areselected from one of or a composition of two of noble metal Ru, Rh, Pt and Pd. The preparation method comprises the following steps: (1) preparing the carrier: mixing cerium dioxide powder, titanium dioxide powder and a pore-forming agent, ball-milling by a ball mill, adding adhesive and water, mixing and kneading, extruding into strips, drying and roasting; and (2) loading the active components:dipping the carrier into active component dipping liquid, drying, roasting and reducing to prepare the loaded noble metal catalyst. The preparation method of the catalyst is simple and cheap and can be industrialized; and the catalyst can be applied to catalyzing treatment on actual industrial wastewater by a wet oxidation technology.

Description

technical field [0001] The invention relates to the technical field of environmental functional materials and waste water treatment, in particular to a precious metal catalyst for catalyzing wet oxidation of industrial waste water, a preparation method and application thereof. Background technique [0002] Wet Air Oxidation (WAO for short) is an important effective treatment method for degrading toxic, harmful and high-concentration organic wastewater developed in the 1950s. It was first proposed by F. J. Zimmermann in the United States in 1958 and achieved A number of patents have been obtained, so it is also called the Zimmerman method. Specifically, under the conditions of high temperature (150~350°C) and high pressure (0.5~20 MPa), the oxygen in the air is used as the oxidant to oxidize and decompose the organic matter and harmful substances containing N and S in the sewage into CO 2 , N 2 , SO 4 2- and H 2 O and other harmless substances, and finally achieve the pu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/44B01J23/46C02F1/74
CPCB01J23/002B01J23/42B01J23/44B01J23/462B01J23/464B01J2523/00C02F1/725C02F1/74B01J2523/3712B01J2523/47B01J2523/821B01J2523/822B01J2523/824B01J2523/828
Inventor 陶海祥江海云郑搏英吴小亮赵瑞强
Owner ZHEJIANG QICAI ECO TECH CO LTD
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