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Nanocomposite catalyst and preparation method and application thereof

A technology of nanocomposites and catalysts, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., to achieve low preparation costs, low production costs, and anti-carbon deposition capabilities strong effect

Inactive Publication Date: 2015-01-07
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no patent publication on a high-pressure, high-temperature methane dry reforming catalyst

Method used

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  • Nanocomposite catalyst and preparation method and application thereof
  • Nanocomposite catalyst and preparation method and application thereof
  • Nanocomposite catalyst and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0047] Example 1 Preparation of high pressure nanocomposite catalyst Ni-Ca-Zr-AlO by co-precipitation method

[0048] The method for preparing high-pressure nanocomposite catalyst Ni-Ca-Zr-AlO by co-precipitation comprises the following steps:

[0049] (1) Preparation of mixed salt solution and alkaline precipitant:

[0050] According to 10g of nanocomposite catalyst, active metal oxide NiO, basic oxide promoter CaO, redox promoter ZrO 2 , carrier Al 2 O 3 The mass ratio of 0.13, 0.06, 0.04, 0.80 to calculate the required mass of nickel nitrate, calcium nitrate, zirconium nitrate and aluminum nitrate, and calculate the required amount of deionized water with the concentration of aluminum nitrate as 0.1mol / L. The required nickel nitrate, calcium nitrate, zirconium nitrate and aluminum nitrate are dissolved in deionized water to prepare a mixed salt solution.

[0051] A NaOH aqueous solution with a concentration of 1 mol / L was prepared as an alkaline precipitant.

[0052] (...

Embodiment 2

[0062] Example 2 Preparation of high pressure nanocomposite catalyst 20Ni / 10Mg-Al by impregnation method 2 O 3

[0063] Preparation of High Pressure Resistant Nanocomposite Catalyst 20Ni / 10Mg-Al by Impregnation Method 2 O 3 method, including the following steps:

[0064] (1) Modification of carrier γ-alumina

[0065] Weigh a certain amount of γ-alumina and calculate the required Mg(NO) when the MgO loading is 10%. 3 ) 2 ·4H 2 O mass, while calculating the required amount of water according to the measured water absorption of γ-alumina. The resulting mass of Mg(NO) will be calculated 3 ) 2 ·4H 2 O is dissolved in the required water, then added to the γ-alumina, and stirring while adding, try to make the liquid-solid mix as evenly as possible, and let the resulting mixture stand for 2 hours, so that the liquid penetrates completely in the carrier pores (during the period, several times of stirring can be performed) ).

[0066] The impregnated samples were rotary-stea...

Embodiment 3

[0074] Example 3 Preparation of high pressure nanocomposite catalyst 20Ni-2Zr-Al by impregnation method 2 O 3

[0075] Preparation of high-pressure nanocomposite catalyst 20Ni-2Zr-Al by impregnation method 2 O 3 method, including the following steps:

[0076] (1) Modification of carrier γ-alumina

[0077] Weigh a certain amount of 100g γ-alumina, calculate 2g ZrO 2 The mass of zirconium nitrate required for the loading amount, and the amount of water required is calculated according to the measured water absorption of γ-alumina. Dissolve the calculated mass of zirconium nitrate in the required water, then add it to the γ-alumina, stir while adding, try to mix the liquid and solid as evenly as possible, and let the resulting mixture stand for 2 hours to make the liquid penetrate completely in the carrier pores. The impregnated samples were dried in an oven at 50°C for 8 hours, the temperature was increased to 100°C, and the drying was continued overnight. After that, the...

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Abstract

The invention discloses a nanocomposite catalyst which is characterized by comprising nano composites with the size of 5-30nm, wherein the nano composites comprise the following components in parts by weight: 1-20% of active metal oxide, 0-20% of an alkaline oxide accelerant, 0-20% of an oxidation-reduction additive and 40-99% of an aluminium oxide carrier. The invention also discloses a preparation method of the catalyst and application of the catalyst to reforming reaction of methane. By optimizing active components, improving interaction between the active components and the carrier and properly performing passivation modification on the catalyst carrier, the activity, stability and the capabilities of resisting sintering and carbon deposition of the catalyst at high temperature under high pressure are improved, the methane conversion rate of the catalyst reaches up to over 90% at the high temperature of 700-1,100 DEG C under high pressure of 1-10bar at the space velocity of 500-250,000cm<3> / (gh), and the catalyst can stably operate for more than 1,000h.

Description

technical field [0001] The invention relates to the field of chemical catalysts, in particular to a nanocomposite catalyst and a preparation method thereof, as well as the application in the methane reforming reaction. Background technique [0002] The main method of industrial synthesis gas is steam reforming of methane, which is suitable for the production of synthetic ammonia and hydrogen production. At present, although the steam reforming of methane has been industrialized, it still faces many catalyst and material problems. Although the research on other single methane reforming to syngas reaction has made great progress, it is still difficult to achieve industrialization, and the main problems are also from catalysts and high-temperature materials. [0003] In recent years, researchers have developed new processes for producing synthesis gas such as methane carbon dioxide reforming, partial oxidation and autothermal reforming. Carbon dioxide reforming of methane, an...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J23/755B01J23/83B01J23/58B01J23/89B82Y30/00B82Y40/00C01B3/40
CPCY02P20/52
Inventor 孙予罕李晋平肖亚宁张军陈庆军孔文波潘秉荣赵铁均黄巍孙志强王东飞
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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