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Prepn of nickel-base catalyst

A technology of nickel-based catalysts and nickel nitrate, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxides/metal hydroxide catalysts, etc., can solve problems such as easy loss and decreased catalytic activity, and achieve Small particle size, large specific surface area, cheap and easy-to-obtain raw materials

Inactive Publication Date: 2003-03-19
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the catalytic activity of Ni, the active component of this catalyst, will decrease due to reasons such as easy loss and sintering during the reaction [Applied Chemistry, Volume 14, Issue 3, Page 19]

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 0.6245 g Ni(NO 3 ) 2 ·6H 2 O was dissolved in 7ml of distilled water to form a nickel nitrate aqueous solution, and then added to a mixed solution formed by 20ml of polyoxyethylene 9-10 octylphenyl ether, 18ml of n-octane and 5ml of n-hexanol. After mixing evenly, add 7 grams of aluminum isopropoxide, stir at 50°C for 3 hours, filter with suction, wash, dry at 80°C, and roast at 600°C for 4 hours in an air atmosphere to obtain the finished catalyst. The particle size of the obtained catalyst was measured to be 8.2nm, and the specific surface area was 357m 2 g -1 .

Embodiment 2

[0018] 2.014 g Ni(NO 3 ) 2 ·6H 2 O was dissolved in 10ml of distilled water to form a nickel nitrate aqueous solution, and then a mixed solution formed of 34ml of polyoxyethylene 9-10 octylphenyl ether, 20ml of n-octane and 15ml of n-hexanol was added. After mixing evenly, add 20ml tetraethyl orthosilicate, stir at 50°C for 2 hours, then filter with suction, wash, dry at 80°C overnight, and then bake at 600°C for 2 hours in an air atmosphere to obtain the finished catalyst. The particle size of the obtained catalyst was measured to be 5.6nm, and the specific surface area was 804m 2 g -1 .

Embodiment 3

[0020] 0.8034 g Ni(NO 3 ) 2 ·6H 2 O was dissolved in 8ml of distilled water, and the preparation process of the catalyst was the same as in Example 1.

[0021] Get this catalyst of 0.4 gram 30-50 mesh and place in the quartz tube reactor of diameter 6mm, pass into 2: 1 methane and oxygen, its space velocity is 8400mlg -1 h -1 , Continuous reaction with temperature programming under normal pressure, the reaction results are listed in Table 1.

[0022] Table 1. Methane conversion and product selectivity of partial oxidation of methane at different temperatures

[0023] temperature x CH4 (%)Y CO (%)Y CO2 (%)Y H2 (%)

[0024] (℃)

[0025] 600 62.3 63.2 36.8 89.8

[0026] 650 74.0 76.7 23.3 94.5

[0027] 700 87.9 89.0 11.0 99.9

[0028] 750 92.3 91.9 8.1 100

[0029] 800 95.8 95.0 5.0 100

[0030] x CH4 :CH 4 Conversion rateY CO : CO selectivity Y CO2 :CO 2 Optional Y H2 :H 2 selectivity

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Abstract

The present invention discloses the preparation process of one kind of nickel-base catalyst and the catalyst is used in the partial oxidation of methane to synthesize gas. The catalyst is prepared through mixing the solution comprising the mixing of water solution of nickel nitrate, the solution comprising normal octane, polyethenoxy 9-10 octyl benzyl ether and normal hexanol and isopropanol aluminium or tetraethyl metasilicate; stirring in 20-60 deg.c sucking filtering, washing, drying and roasting. Compared with traditional catalyst prepared through soaking process, the said one of the present invention has ever smaller size, ever large specific surface area, higher reaction activity, carbon deposition resistance and high temperature stability.

Description

[0001] Field [0002] The invention relates to a preparation method of a nickel-based catalyst, which is used for partial oxidation of methane to prepare synthesis gas. Background technique [0003] In the current field of methane reforming and partial oxidation to synthesis gas, it has been found that only supported Ni catalysts have application prospects, because supported Ni catalysts have similar performance to noble metal catalysts such as Rh and Pt in terms of reactivity and high temperature stability. , and the price is cheap [Petroleum and Gas Chemical Industry, Vol. 26, No. 3, Page 145]. However, the catalytic activity of Ni, the active component of this catalyst, will decrease due to easy loss and sintering during the reaction process [Applied Chemistry, Volume 14, Issue 3, Page 19]. Therefore, it is of great significance to further study the preparation method of nickel-based catalysts and improve its performance for future industrial production. Contents of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755
Inventor 王晓来索继栓许珊
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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