Iron base catalyst for fischer-tropsch synthesis and preparation method thereof

An iron-based catalyst and Fischer-Tropsch synthesis technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of difficulty in greatly increasing the solid content of slurry, etc. problems, to achieve the effect of increasing the effective specific surface area, good activity and selectivity, and high activity

Active Publication Date: 2008-10-29
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the precipitated iron catalyst is prepared by the spray drying method, it is difficult to greatly increase the solid content of the slurry used for spray transportat

Method used

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  • Iron base catalyst for fischer-tropsch synthesis and preparation method thereof

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Effect test

Embodiment 1

[0033] Weigh 4.5Kg Fe(NO 3 ) 3 9H 2 O, 0.15Kg Zr(NO 3 ) 4 ·5H 2 O, add 15L deionized water and stir to dissolve. It is the K of 20wt% that adding 0.2Kg mass concentration is 20wt% in this solution that is stirring again. 2 SiO 3 aqueous solution, stir well. Weigh 3.0Kg (NH 4 ) 2 CO 3 , add 15L deionized water and stir to dissolve. Heating the mixed solution of nitrate and potassium silicate to 80°C by means of jacket steam heating, and then co-flowing with the heated ammonium carbonate solution to produce precipitation in a vigorously stirred tank, and adjusting the salt and alkali salt delivery pumps respectively Control the precipitation temperature in the reaction tank: 80°C, pH: 7.5-8.0. After the precipitation, the precipitate was statically aged for 4 hours, vacuum filtered and washed repeatedly with deionized water. 0.25Kg containing 30wt% SiO 2 Add the silica sol in the precipitated filter cake, then add 0.1Kg 30wt% Cu(NO 3 ) 2 and 0.27 Kg of 30wt% KNO ...

Embodiment 2

[0035] Weigh 4.5Kg Fe(NO 3 ) 3 9H 2 O and 0.075Kg Zr(NO 3 ) 4 ·5H 2 O, add 15L deionized water and stir to dissolve. It is the K of 20wt% that adding 0.2Kg mass concentration is 20wt% in this solution that is stirring again. 2 SiO 3 aqueous solution, stir well. Weigh 3.0Kg (NH 4 ) 2 CO 3 , add 15L deionized water and stir to dissolve. Heating the nitrate mixed solution to 80°C with the jacket water steam heating method, and then co-flowing with the heated ammonium carbonate and potassium silicate mixed solution to produce precipitation in a vigorously stirred tank, and transporting the salt and alkali salts respectively The precipitation temperature in the pump control reaction tank is: 80°C, and the pH is: 7.5-8.0. After the precipitation, the precipitate was statically aged for 4 hours, vacuum filtered and washed repeatedly with deionized water. 0.45Kg containing 30wt% SiO 2 Add the silica sol in the precipitated filter cake, then add 0.31Kg 30wt% Cu(NO 3 ) 2...

Embodiment 3

[0037] Weigh 4.5Kg Fe(NO 3 ) 3 9H 2 O, 0.15Kg Zr(NO 3 ) 4 ·5H 2 O, add 15L deionized water and stir to dissolve. It is the K of 20wt% that adding 0.2Kg mass concentration is 20wt% in this solution that is stirring again. 2 SiO 3 aqueous solution, stir well. Weigh 3.0Kg (NH 4 ) 2 CO 3 , add 15L deionized water and stir to dissolve. Heating the mixed solution of nitrate and potassium silicate to 80°C by means of jacket steam heating, and then co-flowing with the heated ammonium carbonate solution to produce precipitation in a vigorously stirred tank, and adjusting the salt and alkali salt delivery pumps respectively Control the precipitation temperature in the reaction tank: 80°C, pH: 7.5-8.0. After the precipitation, the precipitate was statically aged for 4 hours, vacuum filtered and washed repeatedly with deionized water. 0.37Kg containing 30wt% SiO 2 Add the silica sol in the precipitated filter cake, then add 0.18Kg 30wt% Cu(NO 3 ) 2 and 0.16Kg of 30wt% KNO ...

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Abstract

The present invention relates to a fetto-synthesized iron catalyst, which is characterized in that the catalyst comprises the components with the following weight ratio Fe: Cu: K: Zr: SiO2=100: (0.01-10): (0.01-10): (0.01-15): (0.1-28); wherein, Fe, Cu, K and Zr exist in the form of oxide. The present invention also relates to a preparation method of the catalyst, which includes that the mixed water solution of ferric nitrate, zirconium nitrate and potassium silicate is deposited by salvolatile, the sediment is filtered and washed, and the filter mass is mixed with silica sol, cupric nitrate and potassium nitrate for drying and calcining. More than 90 percent of grains of the catalyst provided by the present invention are micro-sphere, which are an even micro-sphere with smooth surface and has the characteristics of high anti-abrasive performance, high stability and activity, good product selectivity, etc. In addition, the catalyst can reduce the preparation cost and energy consumption of the catalyst and is suitable for mass industrial production.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a high-strength and high-stability iron-based catalyst for Fischer-Tropsch synthesis and a preparation method thereof. Background technique [0002] Fischer-Tropsch synthesis refers to the synthesis of synthesis gas (CO and H 2 ) Catalyzed reaction to form hydrocarbons by reaction on a catalyst. As early as the 1920s, it was invented by German chemists Fischer and Tropsch and was explored by researchers in many countries and regions, optimized and promoted to this day. In today's domestic and foreign background of rising oil prices, Fischer-Tropsch synthesis has become a household name in certain fields as a preliminary technology that can provide liquid fuels and chemical raw materials. The raw material syngas for Fischer-Tropsch synthesis can come from various sources, such as coal, natural gas, biomass or waste plastics, etc. From an economic point of view, iro...

Claims

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Application Information

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IPC IPC(8): B01J23/78C07C1/04
Inventor 常海金嘉璐卜亿峰李小年
Owner CHNA ENERGY INVESTMENT CORP LTD
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