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Mixed phase titanium dioxide loaded ruthenium catalyst for catalyzing and oxidizing VOCs, preparation method therefor and uses thereof

A titanium dioxide, catalytic oxidation technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the impact of toxicity of chlorine-containing species, limit wide application, general Poor adaptability and other problems, to achieve the effect of accelerated degradation, strong universality and good stability

Active Publication Date: 2015-11-04
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

At present, traditional noble metal catalysts such as Pt and Pd have been widely used in the field of catalytic oxidation of VOCs, forming a great social value. However, the high cost of such traditional noble metal catalysts limits their wide application.
Compared with traditional noble metal catalysts, transition metal oxides are less active and universal in catalytic oxidation of VOCs, and are easily affected by the toxicity of chlorine-containing species.

Method used

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  • Mixed phase titanium dioxide loaded ruthenium catalyst for catalyzing and oxidizing VOCs, preparation method therefor and uses thereof
  • Mixed phase titanium dioxide loaded ruthenium catalyst for catalyzing and oxidizing VOCs, preparation method therefor and uses thereof

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Effect test

Embodiment 1

[0039] A catalyst for catalyzing the oxidation of VOCs, comprising a carrier and an active component, the carrier is rutile phase titanium dioxide modified by anatase phase titanium dioxide, the active component is an oxide of ruthenium, and the anatase phase titanium dioxide as a modification component accounts for The mass percent of the catalyst is 5wt.%, based on the mass of the catalyst being 100wt.%, the active component ruthenium oxide (based on the mass of ruthenium) accounts for 1wt.% of the catalyst.

[0040] Above-mentioned catalyst adopts impregnation preparation, and it comprises the steps:

[0041] (1) Add rutile phase titanium dioxide to the ethanol solution of tetra-n-butyl titanate, stir until the ethanol volatilizes, and dry the obtained powder at 80°C for 4 hours in humid air with a water volume ratio of 5vol.%. Hydrolysis of tetra-n-butyl acid to Ti(OH) 4 , and then roasted at 400°C for 6h to remove organic matter and make Ti(OH) 4 Transformation into ana...

Embodiment 2

[0045] Except that the mass percentage of the anatase phase titanium dioxide in the catalyst is 1 wt.%, the rest is the same as that of Example 1.

[0046] The complete oxidation temperature of benzene on the catalyst is 235°C, CO 2 Selectivity ≥ 99.5%.

Embodiment 3

[0048] Except that the mass percentage of the anatase phase titanium dioxide in the catalyst is 10wt.%, the rest is the same as that of Example 1.

[0049] The complete oxidation temperature of benzene by the catalyst is 280°C, CO 2 Selectivity ≥ 99.5%.

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Abstract

The present invention relates to a catalyst for catalyzing and oxidizing VOCs, a preparation method therefor and an application thereof. The catalyst uses rutile phase titanium dioxide modified by anatase phase titanium dioxide as a carrier, an active ingredient is ruthenium or ruthenium oxide, a synergistic effect exists between mixed phase titanium dioxide and the active ingredient, so as to increase the catalytic and oxidation performance of the catalyst on VOCs. In the present invention, the catalyst is low in cost and has good universality, the temperature to completely oxidize various VOCs is between 155 and 240 DEG C, the overall performance is better than the commercial platinum or palladium catalyst, and the selectivity of carbon dioxide, a reaction end product, is approximately 100%, showing a good application prospect.

Description

technical field [0001] The invention belongs to the technical field of resources and environment, and relates to a supported ruthenium catalyst, a preparation method and its use, in particular to a catalyst for catalytic oxidation of VOCs, a preparation method and its use, and the catalyst uses ruthenium oxide as an active component , the rutile phase titanium dioxide in the carrier supports the active components, and there is a synergistic effect between the anatase and rutile mixed phase system and the active components, which greatly promotes the catalytic ability of ruthenium oxides and can efficiently remove a variety of VOCs. Background technique [0002] In modern social life, the hazards of volatile organic compounds (Volatile Organic Compounds, referred to as VOCs) are becoming more and more serious, posing a great threat to human life and health. There are many types of VOCs, common ones include triphenyl (benzene, toluene and xylene), chlorobenzene, trichloroethy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01D53/86B01D53/72
Inventor 朱廷钰王健刘霄龙王雪
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI