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A kind of preparation method and application of au-ce/altiox applied to no+co reaction

An au-ce, reaction technology, applied in separation methods, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of anti-poisoning ability, insufficient light-off characteristics and air-fuel ratio characteristics, high reaction temperature, and achieve good low-temperature catalysis. The effect of activity, simple operation and good pore structure

Inactive Publication Date: 2018-07-13
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problems of existing catalysts such as high reaction temperature, anti-poisoning ability, light-off characteristics, and air-fuel ratio characteristics, the present invention first synthesizes the carrier AlTiO by using a three-block copolymer soft template method. x , then loaded Au on the support by deposition and precipitation method, and finally introduced the transition metal Ce by impregnation method, and finally synthesized the catalyst Au-Ce / AlTiO which can efficiently remove NO and CO at low temperature x

Method used

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  • A kind of preparation method and application of au-ce/altiox applied to no+co reaction
  • A kind of preparation method and application of au-ce/altiox applied to no+co reaction
  • A kind of preparation method and application of au-ce/altiox applied to no+co reaction

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Embodiment 1

[0023] Solution A: Dissolve 5.0 g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer and 5.0 mmol of titanium isopropoxide in 50 mL of absolute ethanol, and stir for 4 h; solution B: Dissolve 45mmol of aluminum isopropoxide in a mixture of 8ml of nitric acid and 25mL of absolute ethanol; mix solutions A and B, and continue to stir for 5h; place the resulting solution in a blast drying oven at 50°C for 48h to dry, and then The solid was calcined in a muffle furnace at 400 °C for 4 h under air atmosphere. 0.6 μg / mL of HAuCl 4 ·3H 2 O aqueous solution at 70 ° C, slowly drop 1mol / mL ammonia water to adjust the pH of the solution to 7.0, at this time a yellow gold colloidal solution is formed; then add the catalyst carrier AlTiO x Make the mass fraction of gold element 3%, stir for 1 h to obtain a suspension; then vacuum filter the obtained suspension at room temperature, and the obtained Au / AlTiO x The solid was dried in a drying oven at 50 °C, and ...

Embodiment 2

[0025] According to Example 1, in the present invention, 10.0 g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer and 10.0 mmol of titanium isopropoxide are dissolved in 100 mL of absolute ethanol, and stirred for 4 h ; Dissolve 90mmol of aluminum isopropoxide in a mixed solution of 16ml of nitric acid and 50mL of absolute ethanol, and keep other conditions unchanged to obtain Au-Ce / TiAlO x .

Embodiment 3

[0027] According to Example 1, in the present invention, 20.0 g of polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer and 20.0 mmol of titanium isopropoxide are dissolved in 200 mL of absolute ethanol, and stirred for 4 h ; Dissolve 180 mmol of aluminum isopropoxide in a mixed solution of 32 ml of nitric acid and 100 mL of absolute ethanol, and keep other conditions unchanged to obtain Au-Ce / TiAlO x .

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Abstract

The invention provides a preparation method of Au-Ce / AlTiOx used in NO+CO reaction, and belongs to the technical field of catalytic materials and nanomaterial preparation. The triblock copolymer template method is used to prepare the aluminum titanium oxide carrier of the catalyst. Tetrachloroauric acid is used as the gold precursor. The gold is loaded on the carrier by a deposition method so that the gold nanoparticles are highly dispersed on the carrier. Impregnation is used to Method to introduce Ce to obtain efficient Au‑Ce / AlTiOx catalyst. The preparation method of the present invention is simple, the reaction conditions are easy to control, and the equipment requirements are low. The diameter of the gold particles of the Au-Ce / AlTiOx material produced is 10 nm, and the specific surface area is 370 m2 / g. The test conditions of the reaction are: 500ppm NO, 500ppm CO, He as the balance gas, the total flow rate of flue gas is 300ml / min, and the denitrification catalytic efficiency reaches 100% at 300°C.

Description

technical field [0001] The present invention provides a method for synthesizing Au-Ce / AlTiO by triblock copolymer soft template method and deposition precipitation method x The method belongs to the technical field of preparation of catalytic materials and nanometer materials. The invention is applied to the field of air pollution prevention and control, and involves the use of Au-Ce / AlTiO x Catalyst to convert harmful NO and CO into N 2 and CO 2 . Background technique [0002] In recent years, air pollution has become more and more serious. The causes of pollution include both natural factors and man-made factors. Among them, man-made destruction occupies the main part, such as coal combustion, random discharge of industrial waste gas, and exhaust gas emitted by motor vehicles during driving. Atmospheric pollutants can be divided into particulate pollutants and gaseous pollutants according to their existing state. The main pollutants are dust, sulfur dioxide (SO 2 ), n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/66B01D53/86B01D53/56B01D53/62
CPCB01D53/865B01J23/66B01D2256/10B01D2256/22B01D2257/502B01D2258/0283B01J35/633B01J35/615
Inventor 吴晓伶前田修孝
Owner DALIAN UNIV OF TECH