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A kind of shell distribution type catalyst and its preparation method and a kind of Fischer-Tropsch synthesis method

A catalyst and shell technology, which is applied in the field of shell-distributed catalysts and its preparation, can solve the problems of cumbersome operation and difficulty in large-scale production, and achieve simple and easy-to-control operation process, high shell rate, and improved shell rate Effect

Active Publication Date: 2019-03-22
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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  • A kind of shell distribution type catalyst and its preparation method and a kind of Fischer-Tropsch synthesis method
  • A kind of shell distribution type catalyst and its preparation method and a kind of Fischer-Tropsch synthesis method
  • A kind of shell distribution type catalyst and its preparation method and a kind of Fischer-Tropsch synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] 1. Put 200 kg of butterfly-shaped γ-alumina particles extruded from a 1.6 mm orifice plate (the particle length is 2-4 mm, and the water absorption rate is 0.8 ml / g) as a porous carrier and put it into the porous carrier storage tank 101 .

[0105] 2. Dissolving cobalt nitrate in water to prepare an impregnating liquid (calculated as CoO, the concentration of cobalt nitrate is 330 g / L) and placing it in the impregnating liquid storage tank 201 .

[0106] 3. Send the porous carrier into the hollow container 301, and rotate the hollow container 301 at the same time (the inner wall of the hollow container 301 is provided with a lifting plate 306, the radial section of the lifting plate 306 is trapezoidal, x=2.4y, β is 60° , z is 0.12R; the inclination angle of the axis of the hollow container 301 relative to the horizontal plane is 2°; the rotation speed is 5 revolutions / minute), and start the vacuum pump to vacuumize the hollow container 301 simultaneously (wherein, in the...

Embodiment 2

[0120] 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 30kPa.

[0121] 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

[0123] The catalyst was prepared by the same method as in Example 1, except that in Step 4, the drying temperature was 120°C.

[0124] 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-distributed catalyst and a preparation method thereof, and a Fischer-Tropsch synthesis method. The preparation method of the catalyst comprises the following steps; putting a porous support in a hollow container, and spraying a catalytic-activity-component-containing solution on the porous support surface, wherein the axial line of the hollow container is oblique relative to the horizontal surface, the feed port is positioned on one end with higher axial trend, the discharge port is positioned on the other end with lower axial trend, the hollow container is vacuumized in the spraying process, and the suction port for vacuumizing is arranged in the porous support formation layer; and after the solution-supported porous support leaves the hollow container through the discharge port, carrying out drying and optional roasting while supplementing the porous support into the hollow container. The method can be used for repeatedly and stably producing the shell-distributed catalyst in a continuous operation mode. When being used for Fischer-Tropsch synthesis reaction, the shell-distributed catalyst can obtain higher C5+ hydrocarbon selectivity and lower 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 Patents(China)
IPC IPC(8): B01J37/02B01J35/00B01J23/75B01J27/19B01J23/888C10G2/00C07C1/04C07C9/04
Inventor 孙霞侯朝鹏夏国富吴玉晋超阎振楠李明丰吴昊
Owner CHINA PETROLEUM & CHEM CORP
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