Shell distribution catalyst and preparation method thereof and Fischer-Tropsch synthetic method

A Fischer-Tropsch synthesis and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. It is suitable for large-scale implementation, the operation process is simple and easy to control, and the shell rate is high.

Active Publication Date: 2016-08-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this preparation method is very strict on time, and the operation is cumbersome, and it is not easy to produce on a large scale

Method used

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  • Shell distribution catalyst and preparation method thereof and Fischer-Tropsch synthetic method
  • Shell distribution catalyst and preparation method thereof and Fischer-Tropsch synthetic method
  • Shell distribution catalyst and preparation method thereof and Fischer-Tropsch synthetic method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] 1. 200kg of butterfly-shaped γ-alumina particles extruded by a 1.6mm orifice plate (the particle length is 2-4 mm, and its water absorption rate is measured to be 0.8 ml / g) is used as a catalyst carrier and put into the porous carrier storage tank 11 .

[0096] 2. Dissolving cobalt nitrate in water, preparing a solution containing catalytically active components (calculated as CoO, the concentration of cobalt nitrate is 330 g / L) and placing it in the solution storage tank 21 .

[0097] 3. Send the porous carrier into the hollow container 31, rotate the hollow container 31 (rotation speed is 3.5 rpm), and start the vacuum pump to vacuumize the hollow container 31 at the same time (wherein the hollow container is arranged at equal intervals along the axis of rotation) 3 vacuum lines, the air outlets on each vacuum line are buried in the layer formed by the porous carrier and the air outlets are distributed at equal intervals along the vacuum pipeline, and the air outlets ...

Embodiment 2

[0113] The catalyst was prepared by the same method as in Example 1, except that in step 3, during the spraying process, the vacuum conditions were not adjusted, and the partial pressure generated by water was up to 20kPa.

[0114] The composition and shell ratio of the prepared catalyst are listed in Table 1, and the relative percentage of cobalt element is listed in Table 2 from the outer layer to the core along the radial section of the porous carrier.

Embodiment 3

[0116] The catalyst was prepared by the same method as in Example 1, except that in Step 4, the drying temperature was 120°C.

[0117] The composition and shell ratio of the prepared catalyst are listed in Table 1, and the relative percentage of cobalt element is listed in Table 2 from the outer layer to the core along the radial section of the porous carrier.

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Abstract

The invention discloses a shell distribution catalyst and a preparation method thereof. The method comprises: (1) disposing a porous support in a hollow container, and spraying a solution containing components with catalytic activity on the surface of the porous support, wherein the total spray amount of the solution is less than the total pore volume of the porous support, and during the spraying process, the hollow container is subjected to vacuum pumping, and an air-pumping port for vacuum pumping is arranged in the layer formed by the porous support; and (2) performing drying and optional roasting of the porous support loaded with the solution and obtained from the step (1). The invention further provides a Fischer-Tropsch synthetic method. In the conditions of a Fischer-Tropsch synthetic reaction, synthesis gas is connected with the shell distribution catalyst having a catalytic action on the Fischer-Tropsch synthetic reaction. Through the method, the shell distribution catalyst can be repeatedly stably produced. The shell distribution catalyst is used for the Fischer-Tropsch synthetic reaction, and is relatively high in C5+ hydrocarbon selectivity and comparatively low in methane selectivity.

Description

technical field [0001] The invention relates to a shell-layer distributed catalyst and a preparation method thereof, and also relates 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 in the depth of the channel are moved to the area close to the surface of the catalyst,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J27/19B01J23/888C10G2/00C07C1/04C07C9/04
Inventor 孙霞侯朝鹏夏国富吴玉晋超阎振楠李明丰徐润
Owner CHINA PETROLEUM & CHEM CORP
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