Cobalt-based catalyst for Fischer-Tropsch synthesis and application of cobalt-based catalyst

A technology of cobalt-based catalyst and Fischer-Tropsch synthesis, applied in the direction of physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as reducing the difficulty of manufacturing reactors, and achieve Reduce requirements, reduce reduction temperature, and expand the effect of application fields

Active Publication Date: 2014-11-26
中科潞安能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Constructing a specific catalytic system to achieve in-situ reduction of cobalt-based catalysts can effectively solve the technical obstacles of low-temperature operation and high-temperature reduction of c

Method used

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  • Cobalt-based catalyst for Fischer-Tropsch synthesis and application of cobalt-based catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Press ZrO 2 Accounting for 70 (wt)% of the final catalyst composition, called zirconium n-propoxide, prepared into a 2.0mol / L aqueous solution, adding 0.01 (mol)% hydrolyzing agent sulfuric acid to the solution under stirring, keeping the temperature at 50°C for 6h, Make zirconium sol; Account for 30 (wt)% of final catalyst by Co, weigh Co(NO 3 ) 2 ·6H 2 O, add deionized water to prepare a solution; according to the need for cobalt reduction in the final catalyst, take the scallop powder and dissolve it in distilled water, wherein the safflower powder:cobalt nitrate (w / w)=0.5:1, stir to form a suspension The turbid liquid is gelatinized at 90°C for 0.4h, and the gelatinization temperature is maintained, and the zirconium sol is slowly added to the gelatinized scallop powder, kept for 1h, stopped stirring, and aged at room temperature for 12h to obtain a gel; The gel was dried in a drying oven at 60°C for 24 hours to obtain a xerogel; the obtained xerogel was placed i...

Embodiment 2

[0031] Press Al 2 o 3 75 (wt)% of final catalyst composition, take a certain amount of aluminum isopropoxide, be mixed with the aqueous solution of 1.8mol / L, add 0.05 (mol)% hydrolysis agent nitric acid to this solution under stirring, keep temperature 60 ℃, keep Time 5h, made aluminum sol; Account for 25 (wt)% of final catalyst by Co, take a certain amount of Co (CH 3 COO) 2 4H 2 O, add deionized water to prepare a solution; according to the need to reduce the cobalt in the final catalyst, weigh a certain amount of methylcellulose and dissolve it in distilled water, wherein methylcellulose:cobalt acetate (w / w)=0.2:1 , stirred to form a suspension, gelatinized at 80°C for 1h, and kept at the gelatinization temperature, slowly added aluminum sol to the gelatinized methylcellulose powder, kept for 2h, stopped stirring, aged at room temperature for 24h, and obtained Gel; put the obtained gel in a drying oven and dry at 70°C for 18 hours to obtain a xerogel; place the obtained...

Embodiment 3

[0035] by SiO 2 Accounting for 80 (wt)% of the final catalyst composition, weigh a certain amount of tetraethyl orthosilicate, and prepare it into a 1.5mol / L aqueous solution, add 0.1 (mol)% hydrolyzing agent nitric acid to the solution under stirring, and keep the temperature at 70°C , hold time 4h, make silica sol; Account for 20 (wt)% of final catalyst according to Co, take a certain amount of CoSO 4 ·7H 2 O, add deionized water to prepare a solution; according to the needs of reducing cobalt in the final catalyst, take a certain amount of methylcellulose powder and dissolve it in distilled water, wherein methylcellulose: cobalt sulfate (w / w)=0.75 : 1. Stir to form a suspension, gelatinize at 70°C for 2h, keep the gelatinization temperature, slowly add silica sol to the gelatinized methylcellulose, keep for 3h, stop stirring, and age at room temperature for 36h to obtain Gel; the obtained gel was dried in a drying oven at 80°C for 14 hours to obtain a xerogel; the obtaine...

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Abstract

The invention relates to a cobalt-based catalyst for Fischer-Tropsch synthesis. The cobalt-based catalyst comprises cobalt oxide, an oxide support and surface passivated cobalt oxide, wherein the cobalt oxide comprises the following components metered by the weight of metal: 10wt%-30wt% of cobalt and the balance being the oxide support. According to the cobalt-based catalyst for Fischer-Tropsch synthesis, an organic carbon source, which has the characteristic of being decomposed in an inert atmosphere to generate a weak reduction component, namely simple substance carbon, is introduced into a process for preparing the catalyst support by virtue of a sol-gel method, and the carbon-containing support is dipped into cobalt and then is roasted, thereby obtaining a surface passivated self-reduction catalyst, wherein the roasting and the self reduction of the cobalt-based catalyst are carried out synchronously, and the online reduction temperature of the cobalt-based catalyst is greatly decreased.

Description

technical field [0001] The invention relates to a Fischer-Tropsch synthesis catalyst, in particular to a cobalt-based Fischer-Tropsch synthesis catalyst and its application. technical background [0002] Cobalt-based fixed bed, iron-based slurry bed and fluidized bed Fischer-Tropsch synthesis technologies are currently commercialized coal-to-oil technologies. Among them, the cobalt-based catalyst has the advantages of strong raw material adaptability, good catalyst stability and recyclability, and the product has low methane selectivity, C 5 + With the advantages of high selectivity and low water gas shift reaction activity, cobalt-based Fischer-Tropsch synthetic oil has become a new technical commanding height and competition point in the field of coal-to-liquids. Nevertheless, there are contradictions and technical barriers between low-temperature operation and high-temperature reduction of cobalt-based catalysts, which greatly increase the requirements for reactor mater...

Claims

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Application Information

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IPC IPC(8): B01J23/75C10G2/00
Inventor 李德宝刘岩贾丽涛侯博肖勇林明桂
Owner 中科潞安能源技术有限公司
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