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Preparation method and application of catalyst applicable to methanation of slurry reactor

A methanation catalyst and slurry bed technology, which is applied in the field of Raney nickel catalyst preparation, can solve the problems of non-innovative Raney nickel catalyst, uneven distribution of catalyst pores, and low catalytic activity, so as to reduce catalyst deactivation High efficiency, stable and reliable preparation conditions, and stable skeleton structure

Inactive Publication Date: 2014-10-01
SEDIN ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no innovation in the preparation process of the Raney nickel catalyst, and the catalyst prepared by this method has the defects of uneven distribution of pores, low mechanical strength, severe catalyst wear and low catalytic activity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) Pretreatment: Soak the nickel powder with dilute sulfuric acid solution for 30 minutes, then soak it with absolute ethanol for 10 minutes, then wash it twice with deionized water, and dry it at 80°C for 2 hours for later use;

[0048] The aluminum powder was soaked in toluene for 20 minutes, then washed twice with deionized water, and dried at 60°C for 3 hours for later use.

[0049] (2) Preparation of nickel-aluminum alloy powder: the mass percentage (nickel powder / nickel powder+aluminum powder) that nickel powder accounts for total mass is 45% and mixes evenly, feeds inert gas N 2 Under the protection of gas, under the conditions of an external magnetic field strength of 15T and a high-temperature furnace temperature of 1300°C for 4 hours, cool down to room temperature under the protection of an inert gas, and grind the nickel-aluminum alloy powder into 120-mesh particles for later use.

[0050] (3) Preparation of Raney nickel catalyst: a stainless steel container...

Embodiment 2

[0054] (1) Pretreatment: Soak the nickel powder with dilute hydrochloric acid solution for 25 minutes, then soak it with absolute ethanol for 20 minutes, then wash it with deionized water for 3 times, and dry it at 70°C for 5 hours for later use;

[0055] The aluminum powder was soaked in acetone for 20 minutes, then washed twice with deionized water, and dried at 60° C. for 3 hours for later use.

[0056] (2) Preparation of nickel-aluminum alloy powder: the nickel powder accounts for 60% of the mass percentage of the total mass (nickel powder / nickel powder+aluminum powder) and is uniformly mixed, and the inert gas Ar gas protection is introduced, and the external magnetic field strength is 35T, high temperature The furnace temperature was 1100°C for 3 hours, cooled to room temperature under the protection of an inert gas, and the nickel-aluminum alloy powder was ground into 150-mesh particles for later use.

[0057] (3) Preparation of Raney nickel catalyst: Place a stainless ...

Embodiment 3

[0061] (1) Pretreatment: Soak nickel powder with dilute nitric acid solution for 40 minutes, then soak with absolute ethanol for 15 minutes, then wash with deionized water for 3 times, and dry at 100°C for 3 hours for later use;

[0062] The aluminum powder was soaked in ether for 25 minutes, then washed three times with deionized water, and dried at 80°C for 4 hours for use.

[0063] (2) Preparation of nickel-aluminum alloy powder: the mass percentage (nickel powder / nickel powder+aluminum powder) that nickel powder accounts for total mass is 80% and mixes evenly, feeds inert gas N 2 Gas protection, under the conditions of an external magnetic field strength of 30T and a high-temperature furnace temperature of 950°C for 4 hours, cooling to room temperature under the protection of an inert gas, and grinding the nickel-aluminum alloy powder into 100-mesh particles for later use.

[0064] (3) Preparation of Raney nickel catalyst: Place the stainless steel container of 9mol / L NaOH...

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Abstract

The invention discloses a preparation method of a catalyst applicable to methanation of a slurry reactor. The method comprises the following steps: pretreating nickel powder by using diluted acid, pretreating aluminum powder by using an organic solvent, uniformly mixing the nickel powder with the aluminum powder, melting in a high-temperature furnace provided with an external magnetic field, cooling to room temperature in the presence of inert gas, grinding into particles of which the size is 80-200 meshes, putting a NaOH solution into an ultrasonic constant-temperature water bath, stirring and adding nickel-aluminum alloy powder into the NaOH solution to react, removing alkaline liquid from the upper layer after the reaction ends, washing by using deionized water until the solution is neutral, and then washing by using absolute ethanol to obtain a Reyne nickel catalyst. The catalyst provided by the invention has the advantages of being high in strength, high in activity and applicable to the methanation of the slurry reactor.

Description

technical field [0001] The invention relates to a preparation method of a Raney nickel catalyst, in particular to a preparation method of a Raney nickel catalyst suitable for slurry bed methanation, the Raney nickel catalyst and its 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 cert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J25/02B01J37/34B01J35/10C10L3/08
Inventor 曹会博张庆庚李晓崔晓曦
Owner SEDIN ENG
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