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Preparation method for Au-Ce/AlTiOx applied to NO+CO reaction and application thereof

An au-ce, reaction technology, applied in the field of synthesis of Au-Ce/AlTiOx, can solve the problems of high reaction temperature, anti-poisoning ability, insufficient air-fuel ratio characteristics of ignition characteristics, etc., and achieve simple operation, good low-temperature catalytic activity, good The effect of the channel structure

Inactive Publication Date: 2016-08-10
DALIAN UNIV OF TECH
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  • 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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  • Preparation method for Au-Ce/AlTiOx applied to NO+CO reaction and application thereof
  • Preparation method for Au-Ce/AlTiOx applied to NO+CO reaction and application thereof
  • Preparation method for Au-Ce/AlTiOx applied to NO+CO reaction and application thereof

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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 Under the condition of 70℃, slowly add 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 ca...

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 the 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 ; 180mmol aluminum isopropoxide was dissolved in the mixed solution of 32ml nitric acid and 100mL absolute ethanol, and other conditions were constant, to obtain Au-Ce / TiAlO x .

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Abstract

The invention provides a preparation method for Au-Ce / AlTiOx applied to NO+CO reaction and belongs to the technical field of a catalytic material and a nanometer material. The preparation method comprises the following steps: preparing a titanium-aluminum oxide carrier of the catalyst according to a triblock copolymer template method; taking chloroauric acid as a gold precursor; loading the gold on the carrier through a deposition precipitation process; highly dispersing nanometer gold grains on the carrier; and introducing Ce by utilizing an impregnation method, thereby acquiring the Au-Ce / AlTiOx catalyst. The preparation method provided by the invention is simple; the reaction condition is easily controlled; the equipment requirement is low; the prepared Au-Ce / AlTiOx material grain has a diameter of 10nm and a specific surface area of 370m<2> / g; and the reaction test conditions are as follows: 500ppm NO, 500ppm CO and He serve as balancing gases, the total flow of flue gas is 300ml / min, and the denitration catalytic efficiency at 300 DEG C reaches 100%.

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 Applications(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
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