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A kind of shell layer distribution catalyst and its preparation method and application

A catalyst and shell technology, applied in the field of shell distributed catalysts, can solve the problems of low methane selectivity, high hydrothermal stability, etc.

Active Publication Date: 2017-10-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the invention is to overcome the Fischer-Tropsch synthesis catalyst that adopts existing non-uniform distribution and cannot have both higher hydrothermal stability and C 5+ Selectivity and the defect of lower methane selectivity, and provide a kind of new shell layer distribution catalyst, a kind of preparation method of shell layer distribution catalyst and the application of described shell layer distribution catalyst in Fischer-Tropsch synthesis reaction

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  • A kind of shell layer distribution catalyst and its preparation method and application
  • A kind of shell layer distribution catalyst and its preparation method and application
  • A kind of shell layer distribution catalyst and its preparation method and application

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preparation example Construction

[0020] The preparation method of shell layer distribution catalyst provided by the invention comprises the following steps:

[0021] (1) The support is immersed in the first solution of the compound containing the modification aid, and then the first drying and the first roasting are carried out, wherein the condition of the immersion and the type of the first solution are controlled so that the modification aid is evenly distributed in the On the carrier, a carrier loaded with the modifying auxiliary agent is obtained;

[0022] (2) Immerse the above-mentioned carrier loaded with the modification aid in the second solution of the compound containing the active component, and then carry out the second drying and the second roasting, wherein the conditions of the immersion and the second solution are controlled. The species is such that the active ingredient is distributed on the carrier in the form of a shell.

[0023] In the specific preparation process, in order to obtain th...

Embodiment 1-7

[0039] Examples 1-7 are used to illustrate the shell-distributed catalyst provided by the present invention and its preparation method.

[0040] The carrier used in 1-4 in the embodiment is spherical silica-alumina particles (the content of alumina is 70% by weight, and the particle diameter is 2-4 millimeters), and the carrier used in 5-7 in the embodiment is spherical γ-alumina particles (The particle diameter is 2-4 millimeter), and the consumption of carrier is 10 grams. The first solution was prepared according to the materials listed in Table 1, and the carrier was impregnated by the saturated impregnation method for 5 minutes. After the impregnation, it was dried at 140°C for 4 hours, and then calcined at 450°C for 4 hours to obtain the carrier loaded with modified assistant. agent carrier. Prepare the second solution according to the materials listed in Table 2, and impregnate the above-mentioned carrier loaded with modification additives by the unsaturated impregnati...

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Abstract

The invention provides a shell-layer distributed catalyst, its preparation method and application. The shell-distributed catalyst includes a support, a modification aid and an active component loaded on the support, wherein the modification aid is uniformly distributed on the support, and the active component is placed on the support. The carrier is distributed in shells. The shell-layer distributed catalyst provided by the invention has high hydrothermal stability, C5+ selectivity and low carbon dioxide and methane selectivity, and has great industrial application prospect.

Description

technical field [0001] The invention relates to a shell-layer distributed catalyst, a preparation method of the shell-layer distributed catalyst and the application of the shell-layer distributed catalyst in Fischer-Tropsch synthesis reaction. Background technique [0002] In a fixed bed reactor, the Fischer-Tropsch synthesis reaction is a gas-solid-liquid heterogeneous reaction system. Although fixed-bed Fischer-Tropsch synthesis is considered a "gas phase reaction", due to the formation of high-carbon products and capillary condensation effects in Fischer-Tropsch synthesis, the heavy hydrocarbon products generated during the reaction are usually filled in the catalyst particles in the form of liquid wax in the pores and cover the surface of the catalyst. In this way, when the catalyst particle exceeds a certain size, the liquid phase diffusion of each reaction component of Fischer-Tropsch synthesis in the particle will seriously affect the chemical reaction rate and produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/75B01J23/83B01J23/888C10G2/00
Inventor 孙霞侯朝鹏夏国富吴玉晋超阎振楠李明丰王奎徐润聂红胡志海
Owner CHINA PETROLEUM & CHEM CORP
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