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Catalyst for preparing advanced hydrocarbon by Fischer-Tropsch synthesis and preparation method of catalyst

A technology for catalyst and Tropsch synthesis, which is applied in the Fischer-Tropsch synthesis catalyst and its preparation with high cobalt loading, and in the field of catalyst and its preparation. It can solve the problems of unsuitable long-chain hydrocarbon catalysts, restricting large-scale applications, and high price, so as to reduce the selection of CH4. performance, enhanced catalytic activity, and increased specific surface effect

Inactive Publication Date: 2014-04-16
HIGH TECH RES INST NANJING UNIV LIANYUNGANG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The noble metal Ru has the highest catalytic activity and the best selectivity, but due to the low resource and high price of Ru, its large-scale application in industry is limited.
Although Ni has a high hydrogenation ability and can easily dissociate CO when used as a catalyst, it is more suitable for the synthesis of methane, and it is not suitable for use as a catalyst for the synthesis of long-chain hydrocarbons.

Method used

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  • Catalyst for preparing advanced hydrocarbon by Fischer-Tropsch synthesis and preparation method of catalyst
  • Catalyst for preparing advanced hydrocarbon by Fischer-Tropsch synthesis and preparation method of catalyst
  • Catalyst for preparing advanced hydrocarbon by Fischer-Tropsch synthesis and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Weigh 21.69g Co(NO 3 ) 2 ·6H 2 O and 0.83g Zr(NO 3 ) 4 ·5H 2 O was dissolved in 60mL deionized water; another 5.55g Na 2 SiO 3 9H 2 O, 8.90g Na 2 CO 3 Dissolve in water to form a 60mL solution. Add the above two solutions dropwise to 100mL deionized water (80°C water bath) at the same time under stirring to form a purple precipitate, wash the precipitate with deionized water, filter it with suction and add it to the flask, and add KNO 3 0.247g and 0.221g of polyethylene glycol (molecular weight: 10,000) were dissolved in 5mL of deionized water and added to the flask, then 50mL of ethanol was added, and magnetically stirred for 2h. Distill the solvent in an oil bath at 110-120°C under stirring, take out the sample, and dry it at 110-120°C for 10 hours to obtain a cobalt-based Fischer-Tropsch synthesis catalyst precursor, wherein the cobalt content is 75wt%, and the zirconium content is 3wt%. The potassium content is 1.5 wt%. The pore size distribution diagram...

Embodiment 2

[0055] Weigh 18.80g Co(NO 3 ) 2 ·6H 2 O and 1.11g Zr(NO 3 ) 4 ·5H 2 O was dissolved in 60mL deionized water; another 8.12g Na 2 SiO 3 9H 2 O, 7.60g Na 2 CO 3 Dissolve in water to form a 60mL solution. Add the above two solutions dropwise to 100mL deionized water (80°C water bath) under stirring to form a purple precipitate, wash the precipitate with deionized water, filter it with suction and add it to the flask, and add KNO 3 0.165g and 0.221g of polyethylene glycol (molecular weight: 10,000) were dissolved in 5mL of deionized water and added to the flask, then 50mL of ethanol was added, and magnetically stirred for 2h. The solvent was distilled off in an oil bath at 110-120°C under stirring, the sample was taken out, and the cobalt-based Fischer-Tropsch synthesis catalyst precursor was obtained after drying, wherein the cobalt content was 65wt%, the zirconium content was 4wt%, and the potassium content was 1wt%.

Embodiment 3

[0059] Weigh 15.90g Co(NO 3 ) 2 ·6H 2 O and 0.55g Zr(NO 3 ) 4 ·5H 2 O was dissolved in 60mL deionized water; another 11.11g Na 2 SiO 3 9H 2 O, 6.60g Na 2 CO 3 Dissolve in water to form a 60mL solution. Add the above two solutions dropwise to 100mL deionized water (80°C water bath) under stirring to form a purple precipitate, wash the precipitate with deionized water, filter it with suction and add it to the flask, and add KNO 3 0.329g and 0.221g of polyethylene glycol (molecular weight: 10,000) were dissolved in 5mL of deionized water and added to the flask, then 50mL of ethanol was added, and magnetically stirred for 2h. Distill the solvent in an oil bath at 110-120°C under stirring, take out the sample, and dry it at 110-120°C to obtain a cobalt-based Fischer-Tropsch synthesis catalyst precursor, wherein the cobalt content is 55wt%, the zirconium content is 2wt%, and the potassium content is 2wt%.

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Abstract

The invention discloses a catalyst for preparing advanced hydrocarbon by Fischer-Tropsch synthesis and a preparation method of the catalyst. The method comprises the following steps: dissolving a mixed liquor of soluble cobalt salt and soluble zircon salt in deionized water to obtain a liquor A; dissolving sodium silicate and a precipitator in the deionized water to obtain a liquor B; under stirring, dropping the liquor A and the liquor B to hot deionized water at the same time; reacting to obtain purple precipitates; washing the precipitates obtained with the deionized water for a plurality of times; adding a mixed liquor of soluble potassium salt and a pore forming substance to the precipitates; then, adding an organic solvent which is 5-20 times the weight of the precipitate and stirring for 2 hours; stirring while distilling the solvent at 110-120 DEG C; drying a taken sample at 110-120 DEG C for 10 hours to obtain a catalyst precursor; and then, tabletting, forming and reducing to obtain the catalyst. In the catalyst, the content of cobalt is 55-75wt%, the content of zircon is 2-4wt% and the content of potassium is 1-2wt%. The catalyst can be used for preparing heavy hydrocarbon from synthesis gases through the Fischer-Tropsch synthesis, and has the characteristics of high catalytic activity, high C<5+> selectivity, long service life and the like.

Description

technical field [0001] The present invention relates to a catalyst and its preparation method for Fischer-Tropsch synthesis to produce higher hydrocarbons, in particular to a Fischer-Tropsch synthesis catalyst with high cobalt load and its preparation method. The cobalt-based catalyst is used for syngas passing through The preparation of heavy hydrocarbons by -Tropsch synthesis reaction belongs to the field of catalyst preparation. Background technique [0002] Since German scholars F.Fischer and H.Tropsch discovered the method of synthesizing hydrocarbon products through CO catalytic hydrogenation in 1923, the research on Fischer-Tropsch (Fischer-Tropsch) synthesis has a history of 90 years, and its synthesis technology has been accompanied by Fluctuations in world crude oil prices and changes in political factors lead to ups and downs. In the 21st century, due to the adjustment of the energy industry structure in various countries and the sharp rise in international oil pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/78B01J37/03C10G2/00
Inventor 夏志宋金文申卫卫臧涵
Owner HIGH TECH RES INST NANJING UNIV LIANYUNGANG
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