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Nickel-cobalt based catalyst as well as preparation method and application thereof

A catalyst, a nickel-cobalt-based technology, applied in the field of nickel-cobalt-based catalysts and their preparation, can solve problems such as gas blockage and disasters, and achieve the effects of cost reduction, strong carbon deposition resistance, and good reaction stability

Inactive Publication Date: 2012-02-01
EAST CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As early as the eighties of last century (Catal.Rev.Sci.Eng., 24 (1982) 67), it was recognized that although the whisker-like carbon deposits generated by metal particle catalysis would not affect the conversion rate of reactants, they would Causes severe air blockage with potentially catastrophic consequences

Method used

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  • Nickel-cobalt based catalyst as well as preparation method and application thereof
  • Nickel-cobalt based catalyst as well as preparation method and application thereof
  • Nickel-cobalt based catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 3.62g of cerium nitrate and dissolve in water to form cerium nitrate aqueous solution; dry 10.00g of γ-Al at room temperature 2 o 3 Immerse in the prepared cerium nitrate aqueous solution for 12 hours by equal volume impregnation method; dry at 120°C for 24 hours; bake at 450°C for 2 hours in air atmosphere to obtain the modified carrier.

[0028] Weigh 1.19g nickel nitrate and 1.77g cobalt nitrate and dissolve in water to make a mixed aqueous solution of nickel nitrate and cobalt nitrate; 12 hours in the mixed aqueous solution; drying at 120° C. for 24 hours; calcining at 700° C. for 5 hours in an air atmosphere to obtain a catalyst precursor.

[0029] The prepared catalyst precursor was reduced in hydrogen at 900 °C for 2 hours.

[0030] figure 1 For the XRD collection of collections of catalysts that the present embodiment makes, by figure 1 It can be seen that the prepared catalyst is composed of four phases of metal nickel, metal cobalt, cerium aluminate ...

Embodiment 2

[0037] Weigh 3.46g of cerium nitrate and dissolve in water to form cerium nitrate aqueous solution; dry 10.00g of γ-Al at room temperature 2 o 3 Immerse in the prepared cerium nitrate aqueous solution for 12 hours by equal volume impregnation method; dry at 120°C for 24 hours; bake at 450°C for 2 hours in air atmosphere to obtain the modified carrier.

[0038] Weigh 0.28g nickel nitrate and 0.28g cobalt nitrate and dissolve in water to make a mixed aqueous solution of nickel nitrate and cobalt nitrate; 12 hours in the mixed aqueous solution; drying at 120° C. for 24 hours; calcining at 700° C. for 5 hours in an air atmosphere to obtain a catalyst precursor.

[0039] The prepared catalyst precursor was reduced in hydrogen at 900 °C for 2 hours.

[0040] The XRD spectrum of the catalyst prepared in this example shows that the prepared catalyst is composed of four phases of metallic nickel, metallic cobalt, cerium aluminate and aluminum oxide.

[0041] After X-ray diffraction ...

Embodiment 3

[0047] Weigh 4.42g of cerium nitrate and dissolve in water to form cerium nitrate aqueous solution; dry 10.00g of γ-Al at room temperature 2 o 3 Immerse in the prepared cerium nitrate aqueous solution for 12 hours by equal volume impregnation method; dry at 120°C for 24 hours; bake at 450°C for 2 hours in air atmosphere to obtain the modified carrier.

[0048] Take by weighing 10.84g nickel nitrate and 3.60g cobalt nitrate and dissolve in water and be made into the mixed aqueous solution of nickel nitrate and cobalt nitrate; 12 hours in the mixed aqueous solution; drying at 120° C. for 24 hours; calcining at 700° C. for 5 hours in an air atmosphere to obtain a catalyst precursor.

[0049] The prepared catalyst precursor was reduced in hydrogen at 900 °C for 2 hours.

[0050] The XRD spectrum of the catalyst prepared in this example shows that the prepared catalyst is composed of four phases of metallic nickel, metallic cobalt, cerium aluminate and aluminum oxide.

[0051] A...

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Abstract

The invention discloses a nickel-cobalt based catalyst as well as a preparation method and application thereof. The catalyst has the following structural general formula: xNi.yCo.zCeAlO3.(100-x-y-z) Al2O3, wherein 0.5<=x<=15, 0.5<=y<=5 and 1<=z<=30. The catalyst is prepared by the following steps of: firstly, impregnating dried gamma-Al2O3 in a ceric salt solution at room temperature by using an incipient-wetness impregnation method, drying and roasting to obtain a modified carrier; then impregnating the modified carrier obtained at room temperature in a mixed water solution of nickel salt and cobalt salt by using the incipient-wetness impregnation method, drying and roasting to obtain a catalyst precursor; and finally, reducing the obtained catalyst precursor in hydrogen gas at 850-1050 DEG C. The catalyst provided by the invention has the advantages of strong coke resistance, high reactivity and selectivity, good reaction stability and heat stability, high chemical and structural stability and the like and can be used as the catalyst for preparing synthesis gas from methane.

Description

technical field [0001] The invention relates to a nickel-cobalt-based catalyst, a preparation method and application thereof, and belongs to the technical field of catalysts. Background technique [0002] The rising price of oil in recent years has made countries around the world realize that energy and chemical industry raw materials cannot be based solely on oil, which has unstable supply and limited resources, and has prompted countries around the world to implement new energy strategies. Natural gas is favored for its cleanness, abundant reserves, wide distribution of reserves, and comprehensive economy superior to other fuels. It is considered to be an ideal fuel and raw material for the chemical industry in the future. The methane content in natural gas is generally around 95%. Methane cannot be liquefied at room temperature, which brings many difficulties to storage and transportation. Therefore, the activation and directional transformation of methane molecules hav...

Claims

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Application Information

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IPC IPC(8): B01J23/83C01B3/26C01B3/40
CPCY02P20/52
Inventor 路勇陈炜盛雯倩何鸣元
Owner EAST CHINA NORMAL UNIVERSITY
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