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Method for preparing Fischer-Tropsch synthesis cobalt-based catalyst

A technology of cobalt-based catalysts and Fischer-Tropsch synthesis, applied in chemical instruments and methods, chemical elements of heterogeneous catalysts, physical/chemical process catalysts, etc., can solve the problem of high energy consumption

Active Publication Date: 2019-02-05
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to provide a method for preparing cobalt-based catalysts for Fischer-Tropsch synthesis with lower energy consumption in order to overcome the problem of high energy consumption in the prior art

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  • Method for preparing Fischer-Tropsch synthesis cobalt-based catalyst

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preparation example Construction

[0020] The method for preparing Fischer-Tropsch synthesis cobalt-based catalyst provided by the invention comprises:

[0021] (1) impregnating the alumina carrier with an equal volume of the precursor solution of M, wherein the precursor solution of M is a precursor solution of silicon and / or a precursor solution of titanium;

[0022] (2) Mix the impregnation mixture in step (1) with the cobalt precursor aqueous solution, and then perform drying and roasting in sequence.

[0023] According to the present invention, in step (1), equal-volume impregnation means that the addition of the solution is 1.05-1.1 times the saturated water absorption of the carrier, and the pore volume of the carrier is measured by the BET method. When the water absorption volume of the carrier is comparable to the pore volume At the same time, it is the saturated water absorption of the carrier. In the present invention, the equal-volume impregnation method is preferably standing at a temperature of 2...

Embodiment 1

[0042] (1) Get 3.8 grams of tetraethyl orthosilicate and dissolve in 17.4 grams of ethanol to obtain a mixed solution, add 30 grams of alumina carrier (purchased from Sasol company, specific surface area is 170m 2 / g, the pore volume is 0.7mL / g, the same below) to impregnate, mix well and let stand at 25°C for 4h;

[0043] (2) Weigh 30 grams of cobalt nitrate hexahydrate and add water to dissolve to a total volume of 24ml, mix the cobalt solution with the above impregnation mixture for impregnation, let stand for 4 hours, dry at 100°C for 4 hours, and then roast at 300°C for 6 hours Catalyst 1 is obtained.

Embodiment 2

[0045] (1) Dissolve 4.8 grams of propyl orthosilicate in 17.4 grams of ethanol to obtain a mixed solution, add 30 grams of alumina carrier for impregnation, mix well and let stand at 60° C. for 2 hours;

[0046] (2) Weigh 30 grams of cobalt nitrate hexahydrate and add water to dissolve to a total volume of 24ml, mix the cobalt solution with the above impregnation mixture for impregnation, let stand for 10 hours, dry at 120°C for 6 hours, and then roast at 250°C for 10 hours Catalyst 2 is obtained.

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Abstract

The invention relates to the field of Fischer-Tropsch synthesis, and discloses a method for preparing a Fischer-Tropsch synthesis cobalt-based catalyst. The method comprises: (1) isovolumetrically impregnating an aluminium oxide carrier with precursor solution of M; (2) mixing an impregnation mixture obtained in the step (1) with precursor aqueous solution of cobalt, and then sequentially carryingout drying and roasting. By the technical scheme, according to the invention, in a case of not carrying out drying and roasting (i.e., the step (1) does not comprise drying and roasting steps) when the carrier is modified, the Fischer-Tropsch synthesis cobalt-based catalyst with excellent catalytic performance is obtained and is relatively energy-saving and environmental-friendly.

Description

technical field [0001] The invention relates to the field of Fischer-Tropsch synthesis, in particular to a method for preparing a cobalt-based catalyst for Fischer-Tropsch synthesis. Background technique [0002] The Fischer-Tropsch synthesis reaction refers to the synthesis gas (H 2 +CO) is converted into hydrocarbons and other chemicals under the action of a catalyst at a certain temperature and pressure. In recent years, due to the increasing shortage of petroleum resources, Fischer-Tropsch synthesis has attracted extensive attention from researchers all over the world. Generally, the reaction of Fischer-Tropsch synthesis to generate hydrocarbons can be represented by the following reaction formula: [0003] mCO+(2m+1)H 2 →C m h 2m+2 +mH 2 o [0004] mCO+2mH 2 →C m h 2m +mH 2 o [0005] 2mCO+(m+1)H 2 →C m h 2m+2 +mCO 2 [0006] In Fischer-Tropsch synthesis reaction and its process, catalyst is one of the most important core technologies. Iron (Fe), cobal...

Claims

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Application Information

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IPC IPC(8): B01J23/75C10G2/00
CPCB01J23/002B01J23/75B01J2523/00C10G2/332C10G2300/1022C10G2300/70B01J2523/31B01J2523/41B01J2523/845B01J2523/47
Inventor 李加波秦绍东杨霞
Owner CHNA ENERGY INVESTMENT CORP LTD
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