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Fischer-Tropsch synthesis method

A technology of Fischer-Tropsch synthesis and synthesis gas, which is applied in the preparation of liquid hydrocarbon mixtures and the petroleum industry, and can solve the problems of low CO conversion rate and C5+ selectivity

Active Publication Date: 2015-11-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is in order to overcome the CO conversion and / or C that adopt existing Fischer-Tropsch synthesis method to obtain 5+ The defect of lower selectivity provides a way to obtain higher CO conversion and C 5+ Selective Fischer-Tropsch synthesis method

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Embodiment 1

[0033] This embodiment is used to illustrate the Fischer-Tropsch synthesis method provided by the present invention.

[0034] (1) Preparation of Fischer-Tropsch synthesis catalyst:

[0035] 10% by weight of β-molecular sieve is mixed with 90% by weight of pseudo-boehmite (Sasol company C1 powder) and extruded with a circular orifice plate with a diameter of 1.4 mm, and then the extruded rod is dried at 120 ° C for 4 hours, and then calcined at 600°C for 4 hours to obtain a carrier. Next, an eggshell catalyst was prepared according to the method disclosed in Example 6 of CN101462079A to obtain a Fischer-Tropsch synthesis catalyst A. The content of the active metal component cobalt in the obtained Fischer-Tropsch synthesis catalyst determined by X-ray fluorescence method was 16% by weight. It can be observed with the naked eye that the active metal component is distributed in an eggshell on the Fischer-Tropsch synthesis catalyst (observed after crushing), and the thickness of ...

Embodiment 2

[0045] This embodiment is used to illustrate the Fischer-Tropsch synthesis method provided by the present invention.

[0046] (1) Preparation of Fischer-Tropsch synthesis catalyst:

[0047]30% by weight of ZSM-22 is mixed with 70% by weight of pseudo-boehmite powder (SB powder purchased from Sasol Company) and then extruded into a circular orifice with a diameter of 1.4 mm, then extruded in Dry at 120°C for 4 hours, and then bake at 600°C for 4 hours to obtain a carrier. Next, an eggshell catalyst was prepared according to the method disclosed in Example 6 of CN101462079A to obtain a Fischer-Tropsch synthesis catalyst B. The content of the active metal component cobalt in the obtained Fischer-Tropsch synthesis catalyst determined by X-ray fluorescence method was 16% by weight. It can be observed with the naked eye that the active metal component is distributed in an eggshell on the Fischer-Tropsch synthesis catalyst (observed after crushing), and the thickness of the shell d...

Embodiment 3

[0051] This embodiment is used to illustrate the Fischer-Tropsch synthesis method provided by the present invention.

[0052] (1) Preparation of Fischer-Tropsch synthesis catalyst:

[0053] 10% by weight of β-molecular sieve is mixed with 90% by weight of pseudo-boehmite (Sasol company C1 powder) and extruded with a circular orifice plate with a diameter of 1.4 mm, and then the extruded rod is dried at 120 ° C for 4 hours, and then calcined at 600°C for 4 hours to obtain a carrier. Next, an eggshell-type catalyst was prepared according to the method disclosed in Example 6 of CN101462079A, and the impregnation solution was replaced with ruthenium nitrate solution of the same concentration and volume to obtain Fischer-Tropsch synthesis catalyst C. The content of the active metal component ruthenium in the obtained Fischer-Tropsch synthesis catalyst determined by X-ray fluorescence method was 2% by weight. It can be observed with the naked eye that the active metal component is...

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Abstract

The present invention provides a Fischer-Tropsch synthesis method. The method comprises: under Fischer-Tropsch synthesis conditions and in the presence of a Fischer-Tropsch synthesis catalyst, reacting synthesis gas in a supercritical medium. The supercritical medium is at least one medium selected from C3-C10 alkane, C3-C10 olefin, C6-C10 aromatic hydrocarbon and light oil produced by Fischer-Tropsch synthesis. By using the Fischer-Tropsch synthesis method provided by the present invention, a higher conversion rate of CO and higher C5+ selectivity can be obtained.

Description

technical field [0001] The invention relates to a Fischer-Tropsch synthesis method. Background technique [0002] In a fixed bed reactor, the Fischer-Tropsch synthesis reaction (F-T) 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 product selectivity, and the influence of diffusion control on catalytic performance is unavoidable. During the internal diffusion of reactants, H 2 The diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G2/00
Inventor 孙霞侯朝鹏夏国富吴玉晋超李明丰徐润聂红
Owner CHINA PETROLEUM & CHEM CORP
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