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Precipitated-iron Fischer-Tropsch catalyst and preparation method and application thereof

A technology of catalyst and iron fee, which is applied in the field of precipitated iron Fischer-Tropsch catalyst and its preparation, to achieve the effect of improving corrosion resistance, improving mechanical strength, and improving the reaction performance of Fischer-Tropsch synthesis

Active Publication Date: 2018-10-16
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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No improvements involving precipitated iron Fischer-Tropsch catalysts

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  • Precipitated-iron Fischer-Tropsch catalyst and preparation method and application thereof
  • Precipitated-iron Fischer-Tropsch catalyst and preparation method and application thereof

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[0027] The preparation method provided by the invention is used to realize the addition of P element into the catalyst. Wherein, the iron source may be selected from various water-soluble compounds containing Fe, preferably at least one selected from ferric nitrate, ferric sulfate, and ferric chloride.

[0028] The copper source may be selected from various water-soluble compounds containing Cu, preferably at least one selected from copper nitrate, copper sulfate and copper chloride.

[0029] The phosphorus source may be selected from various water-soluble compounds containing P element, preferably at least one selected from phosphoric acid, ammonium phosphate, ammonium hydrogen phosphate and aluminum dihydrogen phosphate.

[0030] The silicon source may be selected from various water-soluble compounds containing Si element, preferably at least one selected from silica sol, potassium water glass, sodium water glass and soluble silicates.

[0031] The potassium source may be s...

Embodiment 1

[0061] 60.5g of Fe(NO 3 ) 3 , 1.49g of Cu(NO 3 ) 2 Mix with 0.88g of phosphoric acid, and add sodium carbonate to adjust the pH value to 7.5, then stir vigorously at 70°C until a coprecipitate is formed; after aging the coprecipitate for 60min, filter and wash the coprecipitate until sodium ions Remove (conductivity of filtrate is lower than 500 μ S / cm), obtain filter cake;

[0062] Add deionized water to the filter cake for beating, the solid content is 12.5% ​​by weight; then add 30g of silica sol (concentration is 20% by weight, average particle size 10nm) and mix well, and add an appropriate amount of deionized water for beating, then add 0.62g of K 2 CO 3 Stir evenly, further disperse evenly, and obtain slurry;

[0063]The slurry was spray-dried, and the inlet temperature was controlled to be 270° C., and the outlet temperature was 120° C.; the dried product was then calcined at 500° C. for 6 hours to obtain a precipitated iron Fischer-Tropsch catalyst.

[0064] The...

Embodiment 2

[0068] 60.5g of Fe(NO 3 ) 3 and 1.49g of Cu(NO 3 ) 2 Mix with 2.22g of phosphoric acid, and add sodium carbonate to adjust the pH value to 7.0, then stir vigorously at 70°C until a coprecipitate is produced; after aging the coprecipitate for 60min, filter and wash the coprecipitate until sodium Ions are removed, the conductivity of the filtrate is lower than 500μs / cm, and a filter cake is obtained;

[0069] Add deionized water to the filter cake for beating, the solid content is 10% by weight; then add 30g of silica sol (concentration is 20% by weight, average particle size 10nm) and mix well, and add an appropriate amount of deionized water for beating, then add 0.62g of K 2 CO 3 Stir well to further disperse evenly.

[0070] The slurry is spray-dried, the inlet temperature is controlled at 270°C, and the outlet temperature is 120°C; the dried product is then calcined at 500°C for 6 hours to obtain a precipitated iron Fischer-Tropsch catalyst.

[0071] The composition o...

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Abstract

The invention relates to the field of precipitated-iron Fischer-Tropsch catalysts, and discloses a precipitated-iron Fischer-Tropsch catalyst and a preparation method and application thereof. The catalyst comprises, by parts in weight, 100 parts of Fe, 1-5 parts of Cu, 0.5-5 parts of K, 5-40 parts of Si and 0.01-15 parts of P. Since the precipitated-iron Fischer-Tropsch catalyst contains P, the mechanical strength and abrasion resistance of the catalyst are improved, the Fischer-Tropsch synthesis reactivity of the catalyst is improved, and the carbon utilization rate is increased.

Description

technical field [0001] The invention relates to the field of precipitated iron Fischer-Tropsch catalysts, in particular to a precipitated iron Fischer-Tropsch catalyst and its preparation method and application. Background technique [0002] During Fischer-Tropsch synthesis, the process of converting synthesis gas into liquid fuel mainly composed of paraffin, the catalysts are mainly divided into iron-based and cobalt-based catalysts. Iron-based catalysts are low-cost and are preferred for Fischer-Tropsch synthesis of syngas with low hydrogen / CO ratios because of their excellent water-gas shift (WGS) activity. However, the abrasion and pulverization of precipitated iron-based catalysts lead to the loss of iron-based catalysts and serious wax pollution, which hinders the widespread industrial application of precipitated iron Fischer-Tropsch synthesis catalysts in slurry bubble bed reactors (SBCR). [0003] CN103611579A discloses a method for improving the solid content, flui...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185C10G2/00
CPCB01J27/1853C10G2/332C10G2300/70
Inventor 郭秀盈吕毅军门卓武
Owner CHNA ENERGY INVESTMENT CORP LTD
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