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Supported bimetallic catalyst for catalytic oxidation of VOCs and preparation method and application thereof

A catalytic oxidation and catalyst technology, applied in the field of resources and the environment, can solve problems such as chlorine poisoning, poor activity, and poor universality, and achieve the effects of high selectivity, good stability, and increased reaction rate

Active Publication Date: 2015-02-18
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the wide variety of VOCs, transition metal oxides always have disadvantages such as poor activity, chlorine poisoning, and poor universality when catalytically oxidizing VOCs.

Method used

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  • Supported bimetallic catalyst for catalytic oxidation of VOCs and preparation method and application thereof
  • Supported bimetallic catalyst for catalytic oxidation of VOCs and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A catalyst for catalytic oxidation of VOCs, comprising a carrier, a first active component and a second active component, the carrier is titanium dioxide, the first active component is ruthenium dioxide, the second active component is manganese oxide, and the catalyst The mass of ruthenium is 100wt%, the mass percent of ruthenium in the catalyst in the first active component is 0.2wt%, and the atomic molar ratio of ruthenium and manganese is 1:1.

[0033] Above-mentioned catalyst adopts impregnation preparation, and it comprises the steps:

[0034] (1) Manganese nitrate and ruthenium trichloride are dissolved in water together to obtain a mixed metal salt solution;

[0035] (2) After calcining the carrier at 350°C for 1 hour, add water to obtain a titanium dioxide slurry, add the mixed solution obtained in step (1) into the titanium dioxide slurry, and stir at the same time, then let it stand for 1 hour, and then fully impregnate , placed in an oven at 80°C and heated ...

Embodiment 2

[0038] The rest is the same as that of Example 1 except that the pretreatment of the carrier is calcination at 350°C for 3 hours, the first drying treatment is drying at 130°C for 10 hours, and the first calcination treatment is calcination at 600°C for 6 hours.

[0039] At a space velocity of 60000mL / (g h), when the simulated flue gas containing 1000ppm toluene is catalytically oxidized, the complete oxidation temperature of toluene is 325°C, CO 2 The selectivity is 90%.

Embodiment 3

[0041] Except that the mass percentage of ruthenium element in the catalyst is 2wt%, and the atomic molar ratio of ruthenium and manganese is 1:10, the rest is the same as that of Example 2.

[0042] At a space velocity of 60000mL / (g h), when the simulated flue gas containing 1000ppm toluene is catalytically oxidized, the complete oxidation temperature of toluene is 250°C, CO 2 Selectivity ≥ 99%.

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Abstract

The invention relates to a supported bimetallic catalyst for the catalytic oxidation of VOCs and a preparation method and application thereof. The supported bimetallic catalyst takes titanium dioxide as a carrier, a first active component as ruthenium dioxide, a second active component as any one of magnesium oxide, cobalt oxide, copper oxide or cerium oxide and is capable of accelerating the catalytic oxidation efficiency on the VOCs through the concerted catalysis effect between the two active components. Compared with a commercial supported palladium-platinum catalyst, the supported bimetallic catalyst disclosed by the invention is lower in cost and higher in universality, achieves the complete oxidation temperature of multiple VOCs between 170 DEG C and 250 DEG C, is superior to the commercial supported palladium-platinum catalyst in integral property and very high in final reaction product CO2 selectivity and has preferable application prospect.

Description

technical field [0001] The invention belongs to the technical field of resources and environment, and relates to a supported ruthenium-based bimetallic catalyst, a preparation method and its use, in particular to a catalyst for catalytic oxidation of various VOCs, a preparation method and its use, and the catalyst adopts a bimetallic The oxide active component can efficiently remove various VOCs. Background technique [0002] With the rapid development of modern society, the environmental pollution caused by energy consumption is becoming more and more serious. In the atmosphere, volatile organic compounds (Volatile Organic Compounds, referred to as VOCs) have become an important air pollutant after particulate matter, sulfur dioxide and nitrogen oxides. There are many kinds of VOCs, common ones include benzene, toluene, phenol, chlorobenzene, trichlorethylene, ethyl acetate, etc. The hazards of VOCs are particularly serious. Long-term exposure to VOCs-polluted environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/656B01J23/89B01J23/63B01D53/86B01D53/44B01D53/72B01D53/70
CPCB01D53/70B01D53/72B01D53/86B01J23/46B01J23/63B01J23/656B01J23/89
Inventor 朱廷钰刘霄龙王雪王健
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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