Preparation method of raney nickel catalyst suitable for slurry reactor methanation and application thereof

A catalyst, Raney nickel technology, applied in the field of Raney nickel catalyst and preparation, can solve the problems of uneven distribution of catalyst pores, reduced catalyst catalytic performance, low mechanical strength, etc., achieve stable and reliable preparation conditions, and reduce catalyst deactivation rate , The effect of uniform and controllable particle size

Inactive Publication Date: 2014-09-24
SEDIN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle size of the nickel foam in this preparation method has been fixed, and the nickel foam is impregnated with aluminum, and the particle size and pore structure of the nickel foam have substantial changes after the aluminum is extracted with alkali.
[0007] The methanation catalysts disclosed in the above two patents are all fixed-bed catalysts, but there are few reports about the application of Raney nickel to methanation. The preparation of industrial nickel-aluminum alloy powder or the use of finished Raney nickel catalyst, but the detailed preparation process of t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Pretreatment: Grind nickel-aluminum alloy powder containing 35% nickel into 100-mesh particles, soak in toluene for 30 minutes, then soak in absolute ethanol for 6 minutes, then wash with deionized water for 3 times, and dry in vacuum at 70°C 1 hour, cool to room temperature and set aside

[0042](2) Preparation of Raney nickel catalyst: a stainless steel container with a concentration of 65.0ml of 4mol / L NaOH solution is placed in a 20°C water bath in advance, and then the magnetic field generator is installed outside the constant temperature water tank to adjust the magnetic field strength to 15T, 16.5g of dried nickel-aluminum alloy powder was added to the above NaOH solution at a stirring rate of 300r / min, and then stirred at a constant temperature of 25°C for 4h. After the reaction, the upper layer of lye was removed.

[0043] (3) Adjust the magnetic field strength to 10T, rinse repeatedly to neutrality with deionized water, then rinse 3 times with absolute eth...

Embodiment 2

[0047] (1) Pretreatment: Grind nickel-aluminum alloy powder containing 45% nickel into 120-mesh particles, soak in acetone for 20 minutes, then soak in absolute ethanol for 5 minutes, then wash with deionized water for 3 times, and dry in vacuum at 80°C 2 hours, cool to room temperature and set aside

[0048] (2) Preparation of Raney nickel catalyst: a stainless steel container with a concentration of 70.0ml of 4mol / L NaOH solution is placed in a 15°C water bath in advance, then the magnetic field generator is installed outside the constant temperature water tank, and the magnetic field strength is adjusted to At 18T, add 15.0g of dried nickel-aluminum alloy powder to the above NaOH solution at a stirring rate of 600r / min, then stir at a constant temperature of 30°C for 6h, and remove the upper layer of alkali solution after the reaction.

[0049] (3) Adjust the magnetic field intensity to 13T, rinse repeatedly to neutrality with deionized water, then rinse 3 times with absolu...

Embodiment 3

[0053] (1) Pretreatment: Grind nickel-aluminum alloy powder containing 60% nickel into 160-mesh particles, soak in ether for 40 minutes, then soak in absolute ethanol for 8 minutes, then wash with deionized water for 3 times, and dry in vacuum at 110°C 2 hours, cool to room temperature and set aside.

[0054] (2) Preparation of Raney nickel catalyst: a stainless steel container with a concentration of 80.0ml of 4mol / L NaOH solution is placed in a 10°C water bath in advance, then the magnetic field generator is installed outside the constant temperature water tank, and the magnetic field strength is adjusted to 25T, 15.0g of dried nickel-aluminum alloy powder was added to the above-mentioned NaOH solution at a stirring rate of 800r / min, and then stirred at a constant temperature of 40°C for 5h. After the reaction, the upper layer of lye was removed.

[0055] (3) Adjust the magnetic field strength to 15T, rinse repeatedly to neutrality with deionized water, then rinse 4 times wi...

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Abstract

The invention discloses a preparation method a raney nickel catalyst suitable for slurry reactor methanation. The content of nickel in the raney nickel catalyst is 86wt%-95wt%, and the specific surface area of the raney nickel catalyst is between 85m<2>/g and 180m<2>/g. The raney nickel catalyst has the advantages of high intensity and activity and is suitable for slurry reactor methanation.

Description

technical field [0001] The invention relates to a Raney nickel catalyst and a preparation method, in particular to a Raney nickel catalyst suitable for slurry bed methanation, a preparation method and an application. Background technique [0002] Raney nickel (Raney Ni) catalyst is a very important industrial catalyst, which has high activity and selectivity and low production and use cost, and has been widely used in the catalytic hydrogenation reaction of organic matter. Raney Ni catalyst was first discovered by Murray Raney and applied for a patent in 1925. When the catalyst is prepared, the Al in the aluminum-nickel alloy is first dissolved with NaOH solution, and then washed. The residue is a skeleton structure similar to a sponge. The catalyst mainly contains Ni and Al, and the total specific surface area is 50-130m 2 / g. [0003] The traditional method of preparing Raney nickel is to extract the prepared nickel-aluminum alloy with a certain concentration of alkali s...

Claims

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Application Information

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IPC IPC(8): B01J25/02C10L3/08C07C9/04C07C1/04
Inventor 李晓张庆庚崔晓曦曹会博
Owner SEDIN ENG
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