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Ruthenium catalyst for catalytic oxidation of VOCs as well as preparation method and application of ruthenium catalyst

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

Active Publication Date: 2015-12-30
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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  • Ruthenium catalyst for catalytic oxidation of VOCs as well as preparation method and application of ruthenium catalyst
  • Ruthenium catalyst for catalytic oxidation of VOCs as well as preparation method and application of ruthenium catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0035] The above catalyst is prepared by an equal volume impregnation method, which includes the following steps:

[0036] (1) Dissolve aluminum nitrate in water, then add rutile phase titanium dioxide and stir to obtain a mixed slurry, stand at room temperature for 12 hours and then 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 e...

Embodiment 2

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

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

Embodiment 3

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

[0044] The temperature of the catalyst for complete oxidation of benzene is 220℃, 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 (Volatile Organic Compounds) as well as a preparation method and application of the ruthenium catalyst. The catalyst adopts rutile titania as a supporter, the supporter is modified by Al2O3 or La2O3, active components are oxides of ruthenium, and the preparation method is the equivalent-volume impregnation method. During preparation of the catalyst, the supporter is modified at first, and then the active components are supported. Through modification of the supporter, the particle sizes of the supported oxides of ruthenium are successfully controlled, the migration path of ruthenium species is effectively cut off, the activities of the oxides of ruthenium, on the surface of the supporter, are higher, and meanwhile, the stability of the catalyst in the long-term use process is improved. The catalyst system has the complete catalytic oxidation temperature of 165-250 DEG C to various VOCs, is superior in overall performance and stability to a catalyst system not modified by a supporter and has a relatively 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 application thereof, and in particular to a catalyst for catalytic oxidation of multiple VOCs, a preparation method and application thereof. The catalyst uses ruthenium oxide as the active component, the carrier rutile titanium dioxide supports the ruthenium oxide, the carrier is modified, and the modified component is Al 2 O 3 Or La 2 O 3 It not only limits the particle size of ruthenium oxide, but also prevents the migration of ruthenium oxide on the surface of the support. Therefore, the activity and stability of the catalyst are improved, and a variety of VOCs can be efficiently removed. Background technique [0002] Volatile organic compounds (Volatile Organic Compounds, VOCs for short) is a collective term for a series of easily volatile toxic and harmful substances, which have caused widespread conce...

Claims

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Application Information

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Patent Type & Authority Applications(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