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Shell distribution catalyst, preparation method thereof and Fischer-Tropsch synthesis method thereof

A Fischer-Tropsch synthesis and catalyst technology, which can be used in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. The effect of less intensity and simple and easy-to-control operation

Active Publication Date: 2018-11-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when this impregnated drum is used to prepare the catalyst, the strength of the catalyst is poor and the molding rate is low

Method used

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  • Shell distribution catalyst, preparation method thereof and Fischer-Tropsch synthesis method thereof
  • Shell distribution catalyst, preparation method thereof and Fischer-Tropsch synthesis method thereof
  • Shell distribution catalyst, preparation method thereof and Fischer-Tropsch synthesis method thereof

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preparation example Construction

[0032] According to a first aspect of the present invention, the present invention provides a method for preparing a shell-distributed catalyst, the method comprising:

[0033] The porous carrier is placed in the hollow drum body, the solution containing the catalytically active component is sprayed on the surface of the porous carrier, the total spraying amount of the solution is less than the total pore volume of the porous carrier, and the drum body has The opening and closing inlet for receiving the porous carrier and the opening and closing outlet for outputting the porous carrier, the ratio of the axial length of the drum body to the maximum radial length is 3-9, the rotor The drum body is arranged horizontally, the porous carrier loaded with solution leaves the drum body through the outlet, and then replenishes the porous carrier into the drum body through the feed port, and the porous carrier leaving the drum body is dried and can be Selected roasting.

[0034] In the...

Embodiment approach

[0046] According to a preferred embodiment of the present invention, the sheet-shaped protrusions are arranged along the axial direction of the drum body. More preferably, the lifting plate includes multiple rows of sheet-like protrusions arranged in parallel, wherein the distance between two adjacent rows is adjustable, so that the turning frequency of the material to be impregnated can be changed, thereby changing the impregnation effect.

[0047] Specifically, the smaller the distance between two adjacent rows of sheet-shaped protrusions is, the higher the frequency of flipping is. As a preferred manner, the distance between two adjacent rows of sheet-shaped protrusions is z (z is the linear distance between the right end point of the left sheet-shaped protrusion and the left end point of the right sheet-shaped protrusion), and Satisfied as 0<z<R, preferably 0<z<0.25R, more preferably 0.1R<z<0.25R, where R is the radius of the drum body 301 (the largest inner radius in the ...

Embodiment 1

[0101] 1. If figure 1 As shown, 200kg of butterfly-shaped γ-alumina particles extruded by a 1.6mm orifice (the particle length is 2-8 mm, and its water absorption rate is measured to be 0.8 ml / g) is used as a catalyst carrier and put into a porous carrier storage tank 101 middle.

[0102] 2. Dissolving cobalt nitrate in water to prepare an impregnating solution (calculated as CoO, the concentration of cobalt nitrate is 330 g / L) and placing it in the solution storage tank 201 containing catalytically active components.

[0103] 3. The porous carrier is sent into the drum body 301, the drum body 301 (the axial length of the drum body 301 is 3.5 meters, the maximum radial inner diameter (diameter) is 1 meter, and the minimum radial inner diameter (diameter) is 0.3 The inner wall of the drum body 301 is provided with a lifting plate 304, the axial section of the lifting plate 304 is arc-shaped, x=2.2y, z is 0.2R, and the drum body 301 is horizontally arranged, wherein, x is a lif...

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Abstract

The invention relates to the field of catalyst preparation, and discloses a shell distribution catalyst, a preparation method thereof and a Fischer-Tropsch synthesis method thereof. The preparation method of the catalyst comprises the steps of placing a porous support in a hollow drum body, spraying a solution containing a catalytically active component onto the surface of the porous support. Thetotal spray amount of the solution is smaller than the total pore volume of the porous support. The drum body has a closable feeding port for receiving the porous support and a closable discharge portfor outputting the porous support. The ratio of the axial length to the maximum radial length of the drum body is 3-9. The drum body is horizontally disposed, and the porous support loaded with the solution leaves the drum body through the discharge port, then the porous support is added to the drum body through the feeding port, and the porous support left an intermediate containerthe drum bodyis dried and optionally calcined. The catalyst prepared by the method has a high shell layer ratio, high strength and a high molding rate, and is more favorable for detecting product quality.

Description

technical field [0001] The invention relates to the field of catalyst preparation, in particular to a shell-layer distributed catalyst and a preparation method thereof, and also to a Fischer-Tropsch synthesis method. Background technique [0002] If the product molecules produced by the reaction deep in the pores of the catalyst cannot diffuse out in time to further react, on the one hand, it will affect the selectivity of the catalyst, and on the other hand, it will affect the life of the catalyst. Especially for reactions in which internal diffusion is a controlled step, it is desirable that the reaction occurs at a location that facilitates the diffusion of reactants and products, and generally it is desirable to occur on the surface of the catalyst. In addition, in the cost of the catalyst, the cost of the active component accounts for a relatively large proportion. If the components that are not highly utilized and distributed deep in the pores are moved to the area clo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J23/745B01J23/75B01J35/08B01J37/02C10G2/00
CPCC10G2/331C10G2/332C10G2/333B01J23/462B01J23/745B01J23/75B01J37/0201B01J35/51
Inventor 孙霞侯朝鹏夏国富吴玉晋超阎振楠李明丰吴昊
Owner CHINA PETROLEUM & CHEM CORP
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