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Volatile organic compound catalytic oxidation catalyst with high chlorine poisoning resisting efficiency, and preparation method thereof

A volatile organic compound, catalytic oxidation technology, applied in the direction of physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of agglomeration Effectively solve problems such as strong CVOCs activation performance, maintain activity, and high catalytic activity

Active Publication Date: 2019-11-05
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

RuO 2 / TiO 2 System catalysts have gained some attention for the catalytic oxidation of CVOCs, but for RuO 2 Anatase TiO with higher activity on CVOCs activation 2 On the support surface, RuO due to lattice mismatch 2 The phenomenon of reunion has not been effectively resolved

Method used

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  • Volatile organic compound catalytic oxidation catalyst with high chlorine poisoning resisting efficiency, and preparation method thereof
  • Volatile organic compound catalytic oxidation catalyst with high chlorine poisoning resisting efficiency, and preparation method thereof
  • Volatile organic compound catalytic oxidation catalyst with high chlorine poisoning resisting efficiency, and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] CVOCs Catalytic Oxidation Catalyst RuO 2 / Sn y Ti 1-y o 2 preparation of

[0046] Dissolve an appropriate amount of tin chloride in deionized water and stir for 30 minutes until completely dissolved. Then, according to the different doping ratios of Sn and Ti, the corresponding chemical equivalent of tetrabutyl titanate was slowly added dropwise to the aqueous solution of tin chloride (Sn y Ti 1-y o 2 In the preparation process of the method, the molar ratio of tin chloride and tetrabutyl titanate used is y:1-y), the dropping process is carried out with vigorous stirring, and after the dropping is completed, continue to stir vigorously for 30 minutes to ensure that the solution is fully mixed . Finally, ammonia water was added dropwise into the obtained mixed solution at a rate of 60 drops per minute until the pH value of the solution was 10. After suction filtration, the obtained sediment was aged for 12 hours and then washed three times with deionized water an...

Embodiment 2

[0051] Get the RuO described in embodiment 1 2 / Sn 0.2 Ti 0.8 o 2 Catalytic oxidation catalyst 200mg, the test conditions are: 1000ppm acetone, 20% O 2 , N 2 Equilibrium, 30000 / h space velocity, through gasmet to its catalytic activity and CO 2 Selectively tested, activity results see image 3 .

[0052] Get the RuO described in embodiment 1 2 / Sn 0.2 Ti 0.8 o 2 Catalytic oxidation catalyst 200mg, test conditions: 1000ppm propane, 20% O 2 , N 2 Equilibrium, 30000 / h space velocity, test its catalytic activity by gasmet, see the activity result image 3 .

[0053] From image 3 It can be seen that the high-efficiency chlorine-resistant CVOCs catalytic oxidation catalyst in the present invention also has high catalytic activity for the catalytic oxidation of various VOCs such as acetone and propane. When the temperature is lower than 300 ° C, both acetone and propane have been completely converted.

Embodiment 3

[0055] Get the CVOCs catalytic oxidation catalyst described in embodiment 1 (RuO 2 / Sn 0.2 Ti 0.8 o 2 ) 200mg, the test conditions are: 1000ppm dichloromethane, 20%O 2 , N 2 Equilibrium, 30000 / h space velocity, stability test is carried out under the condition of temperature of 250 ℃, the stability test results are shown in Figure 4 .

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Abstract

The invention relates to a volatile organic compound catalytic oxidation catalyst with a high chlorine poisoning resisting efficiency, and a preparation method thereof. The catalyst adopts RuO2 as anactive component, and adopts a SnyTi1-yO2 or MOx-SnyTi1-yO2 mixed metal oxide as a carrier. TiO2 is doped with Sn to realize the regulation of the crystal form of the carrier oxide, so the dispersiondegree of RuO2 on the surface of the carrier is greatly improved while constructing the tin-titanium-based catalyst carrier with a high activation performance; and the catalyst has the characteristicsof high catalytic activity to chlorine-containing volatile organic compounds, strong chlorine poisoning resistance, and high selectivity of the product to CO2, has a good removal effect on common volatile organic compounds, and can be widely used in treatment of chlorine-containing organic waste gases in the fields of pharmaceutical, organic synthesis and paint spraying.

Description

technical field [0001] The invention belongs to the technical field of catalyst and its preparation technology and industrial source volatile organic compound catalytic combustion treatment technology, and in particular relates to a highly efficient chlorine poisoning resistant volatile organic compound catalytic oxidation catalyst and a preparation method thereof. Background technique [0002] Volatile organic compounds (VOCs) are a relatively common type of air pollutants, and chlorinated volatile organic compounds (CVOCs) are one of the more important types, such as dichloromethane, 1,2-dichloroethane, trichloroethylene , Chlorobenzene, etc. are widely used in many industries such as pharmaceuticals, coatings, rubber and organic synthesis. As far as the environment is concerned, the chlorine in CVOCs will destroy the ozone layer through the chlorine catalytic cycle, and will also lead to the formation of photochemical smog; as far as the human body is concerned, most CVOC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/62B01J31/16B01D53/86B01D53/44
CPCB01D53/8687B01D2257/708B01J23/002B01J23/626B01J23/6482B01J23/6484B01J23/6525B01J23/6527B01J27/188B01J27/19B01J27/195B01J27/198B01J2523/00B01J2523/43B01J2523/47B01J2523/821
Inventor 高翔郑成航骆仲泱岑可法倪明江杨洋吴卫红宋浩施正伦周劲松方梦祥余春江王树荣程乐鸣王勤辉
Owner ZHEJIANG UNIV
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