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A kind of ruthenium catalyst for catalytic oxidation vocs, preparation method and application thereof

A catalytic oxidation and catalyst technology, applied in the fields of resources and environment, can solve the problems of reducing the number of active sites, agglomeration, reducing catalytic activity, etc., and achieve the effects of good thermal stability, low cost and high catalytic activity

Active Publication Date: 2017-12-26
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

However, the disadvantage of ruthenium as an active component is that it is easy to migrate on the surface of the carrier, resulting in agglomeration, which greatly reduces the number of active sites and reduces the catalytic activity.

Method used

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  • A kind of ruthenium catalyst for catalytic oxidation vocs, preparation method and application thereof
  • A kind of ruthenium catalyst for catalytic oxidation vocs, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A catalyst for catalytic oxidation of VOCs, characterized in that the catalyst includes a carrier and an active component, the carrier is rutile phase titanium dioxide, which is modified, and the modification component is Al 2 o 3 , the active component is the oxide of ruthenium, the mass of the catalyst is 100wt.%, the modification component Al 2 o 3 The mass percent of the catalyst is 5.0wt.%, and the active component ruthenium oxide (based on the mass of ruthenium) is 1.0wt.% of the catalyst.

[0035] Above-mentioned catalyst adopts equal volume impregnation method to prepare, and it comprises the steps:

[0036] (1) Dissolve aluminum nitrate in water, then add rutile phase titanium dioxide and stir to obtain a mixed slurry, let stand at room temperature for 12 hours, dry at 110°C for 6 hours, and then perform the first roasting at 500°C for 6 hours;

[0037] (2) Add the powder obtained in step (1) to RuCl 3 In the solution, stir evenly and then stand still, stan...

Embodiment 2

[0040] Except that the oxide of active component ruthenium (based on the mass of ruthenium) accounted for 0.2wt.% by mass of the catalyst, the rest was the same as that of Example 1.

[0041] The complete oxidation temperature of the catalyst to benzene is 255°C, CO 2 The selectivity is ≥99.5%.

Embodiment 3

[0043] Except that the active component ruthenium oxide (based on the mass of ruthenium) accounted for 10 wt.% of the catalyst, the rest was the same as in Example 1.

[0044] The complete oxidation temperature of benzene on the catalyst is 220°C, CO 2 The selectivity is ≥99.5%.

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Abstract

The invention relates to a supported metal catalyst for catalytic oxidation of VOCs, a preparation method and application thereof. The catalyst uses rutile phase titanium dioxide as a carrier, and the carrier is modified with Al2O3 or La2O3, the active component is ruthenium oxide, and the preparation method is an equal-volume impregnation method. During the preparation of the catalyst, the carrier is firstly modified, and then the active components are loaded. In the present invention, the particle size of the ruthenium oxide after loading is successfully controlled by modifying the carrier, and the migration path of the ruthenium species is effectively blocked, which not only makes the ruthenium oxide on the surface of the carrier more active, but also improves the stability of the catalyst during long-term use. The complete catalytic oxidation temperature of this catalytic system for a variety of VOCs is between 165 and 250 ° C, and the overall performance and stability are better than those of the catalyst system without carrier modification, which has 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-based catalyst, a preparation method and its use, in particular to a catalyst for catalyzing and oxidizing various VOCs, a preparation method and its use. The catalyst uses oxides of ruthenium as active components, and the carrier rutile titanium dioxide supports the oxides of ruthenium. The carrier is modified, and the modified component is Al 2 o 3 or La 2 o 3 , which not only limits the particle size of the ruthenium oxide, but also hinders the migration of the ruthenium oxide on the surface of the carrier. Therefore, the activity and stability of the catalyst are improved, and various VOCs can be removed efficiently. Background technique [0002] Volatile organic compounds (Volatile Organic Compounds, referred to as VOCs) are a series of easily volatile toxic and harmful substances, which have attracted widespread attention due to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/46B01J23/63B01D53/86B01D53/70B01D53/72
Inventor 朱廷钰王健刘霄龙曾俊淋
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI