Ruthenium-titanium composite oxide modified by the third main group element and its preparation method and application

A titanium composite oxide, composite oxide technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, combustion methods, etc., can solve the problem of low stability, limited catalyst activity, toxicity and other problems, to achieve the effect of low complete conversion temperature, convenient and practical technical route, and strong anti-chlorine poisoning ability

Active Publication Date: 2020-06-02
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention solves the technical problems of limited catalyst activity, low stability and toxicity in the catalytic combustion of chlorinated hydrocarbons in the prior art, and provides a high-efficiency ruthenium-gallium-titanium composite oxide catalyst and its preparation method and is used for chlorine Application of Hydrocarbon Catalytic Combustion

Method used

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  • Ruthenium-titanium composite oxide modified by the third main group element and its preparation method and application
  • Ruthenium-titanium composite oxide modified by the third main group element and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 14.2g of (CH 3 CH 3 CHO) 4 Dissolve Ti in 30ml of ethanol, stir for 1 hour, quickly drop 20ml of ethanol-water mixed solution to obtain a gel, dry at 110°C for 12 hours, and roast at 500°C for 4 hours to obtain a catalyst carrier; weigh 2g of TiO 2 Carrier, measure 1ml of RuCl 3 The solution (10 g / L concentration) was added to the crucible, about 1 ml of deionized water was added dropwise, and stirred repeatedly with a glass rod until uniformly mixed. After natural evaporation to dryness, place it in an oven at 110°C for overnight drying, and then bake at 400°C for 4 hours to obtain Ru / TiO 2 Catalyst, and test the catalytic effect of this catalyst on dichloromethane.

Embodiment 2

[0035] Weigh 14.07g of (CH 3 CH 3 CHO) 4 Ti and 0.14g Ga(NO 3 ) 3 ·xH 2 O was respectively dissolved in 30ml of ethanol and 30ml of ethanol-water mixed solution, and after stirring for 1 hour, the gallium salt solution was quickly poured into the titanium salt solution to obtain a gel, and then the resulting gel was dried at 110°C for 12 hours, and then dried at 500°C Calcined for 4 hours to prepare the catalyst carrier; weigh 2g of xGa-TiO2 Carrier, measure 1ml of RuCl 3 Add the solution (concentration: 10g / L) into the crucible, add about 1ml of deionized water dropwise, stir repeatedly with a glass rod until the mixture is uniform, dry it in an oven at 110°C overnight, and bake it at 400°C for 4 hours. Prepared Ru / 1%Ga-TiO 2 catalyst. The substance amount of the third main group element Ga accounts for 1% of the total amount of Ga and Ti substances, and the mass of ruthenium in the ruthenium-titanium composite oxide modified by the third main group element is 0.5%. T...

Embodiment 3

[0037] According to the same method as in Example 2, adjust the ratio of titanium salt and gallium salt to prepare Ru / 3%Ga-TiO 2 catalyst. The substance amount of the third main group element Ga accounted for 3% of the total amount of Ga and Ti, and the catalytic effect of the catalyst on dichloromethane was tested.

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Abstract

The invention discloses a third main group element modified ruthenium titanium compound oxide and a preparation method and an application thereof and belongs to the technical field of catalytic materials. The preparation method comprises the following steps: first, preparing a titanium oxide catalyst carrier modified by third main group elements with different molar contents by means of a sol-gelmethod; and then loading ruthenium by means of an impregnating method to prepare the compound oxide. Titanium salt used by the sol-gel method is titanium sulfate, tetraisopropyl titanate or tetrabutyltitanate, and the used third main group element salt is borate, aluminate, gallium salt or indium salt. The catalyst for chlorohydrocarbon catalytic combustion is low in ignition temperature, and lowin complete combustion temperature. In conditions that the air speed is 60000 ml / g / h and the chlorohydrocarbon concentration is 1000 ppm, the chlorohydrocarbon can be fully combusted at a temperatureof lower than 350 DEG C. Meanwhile, the catalyst also has very high stability, and can be activated for 100 hour at 305 DEG C in catalytic combustion of dichloromethane. The preparation method of thecatalyst is simple and easy to operate, and the prepared catalyst has activity and stability.

Description

technical field [0001] The invention relates to a ruthenium-titanium composite oxide modified by elements of the third main group and a preparation method and application thereof, belonging to the technical field of catalytic materials. Background technique [0002] In recent years, environmental problems have become more and more prominent, and the ecological environment has been continuously destroyed, seriously endangering human health and sustainable development of society. Environmental issues, especially air pollution, have become the most concerned issues. Promoting green development, focusing on solving outstanding environmental problems, and winning the battle to defend the blue sky are important issues facing our country. In view of the fact that my country's current pharmaceutical, petrochemical, chemical, textile printing and dyeing industries cannot eliminate pollutants from the source, especially various chlorine-containing organic compounds (CVOCs). The 12 p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/62B01J23/46B01J35/10F23G7/07
Inventor 李仁铸邓威张龙郭利民
Owner HUAZHONG UNIV OF SCI & TECH
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