Iron catalyst containing titanium deposition for catalyzing Fischer-Tropsch synthesis reaction and method for producing the same

An iron catalyst, Fischer-Tropsch synthesis technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, and hydrocarbon production from carbon oxides, etc., to achieve enhanced anti-sintering performance, high specific surface area, The effect of the simple preparation process

Active Publication Date: 2008-11-05
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Iron catalyst containing titanium deposition for catalyzing Fischer-Tropsch synthesis reaction and method for producing the same

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Embodiment 1

[0043] 4 kg of Fe(NO 3 ) 3 ·7H 2 O, 120 g Cu(NO 3 ) 2 ·3H 2 O and 250 grams of titanium nitrate-nitric acid solution (16%) are dissolved (diluted) in distilled water respectively, are mixed with 5% ferric nitrate solution, mix with 5% copper nitrate solution afterwards, dilute titanium nitrate-nitric acid solution simultaneously to form Dissolve 15% titanium nitrate aqueous solution at the same time to obtain 10% sodium carbonate solution. Use a peristaltic pump to add the above-mentioned solutions to a 20L stirring tank. The jacket heating temperature is maintained at 80°C. The transmission speed of the peristaltic pump should be According to the metering ratio of acidic and alkaline solutions, the precipitation was completed under the conditions of a stirring rate of 120 rpm and a pH value of 7.5, and the temperature was lowered to 60° C. for aging for 1 hour. The slurry after the sedimentation obtained was washed with a vacuum filter and deionized water for 4 times, an...

Embodiment 2

[0047] 4 kg of Fe(NO 3 ) 3 ·7H 2 O, 200 g Cu(NO 3 ) 2 ·3H 2 O and 500 grams of titanium nitrate-nitric acid solution (16%) are dissolved (diluted) in distilled water respectively, are mixed with 5% ferric nitrate solution, mix with 5% copper nitrate solution afterwards, dilute titanium nitrate-nitric acid solution preparation simultaneously into 800 grams of 10% titanium nitrate aqueous solution, and dissolve at the same time to obtain a sufficient amount of 10% sodium carbonate solution. Use a peristaltic pump to add the above-mentioned various solutions to a 20L stirred tank. The jacket heating temperature is maintained at 85 ° C. The peristaltic pump The transmission speed should be carried out in accordance with the metering ratio of acidic and alkaline solutions. Under the conditions of a stirring rate of 120rpm and a pH value of 7.8, the precipitation is completed, and the temperature is lowered to 60°C for aging for 2 hours. The slurry after the sedimentation obtai...

Embodiment 3

[0051] 4 kg of Fe(NO 3 ) 3 ·7H 2 O, 120 g Cu(NO 3 ) 2 ·3H 2 The O solution was dissolved in distilled water respectively, mixed and prepared to contain 5% ferric nitrate and 5% copper nitrate solution, and 750 ml of propanol solution containing 210 grams of tetraisopropyl titanate was prepared at the same time, diluted in deionized water, and then separately Prepare a sufficient amount of 10% sodium carbonate solution in the container, and use a peristaltic pump to add the above-mentioned solutions to a 20L stirred tank. The heating temperature of the jacket is maintained at 75°C. The metering ratio of the solution is carried out, and the precipitation is completed under the conditions of a stirring rate of 120 rpm and a pH value of 7.5, and the temperature is lowered to 60° C. for aging for 1 hour. The slurry after the sedimentation obtained was washed with a vacuum filter and deionized water for 4 times, and the conductivity of the filtrate was tested, and the nitrate i...

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Abstract

The invention relates to an iron catalyst which contains an assistant and used for catalyzing the Fischer-Tropsch reaction, which is characterized by comprising the components with mass ratios of Fe: Cu; K: Ti: SiO2 equal to 100: (0.1-10): (0.1-10): (0.01-5): (5-30), wherein, Fe, Cu, K and Ti exist in the form of oxides. The invention also relates to a preparation method for the catalyst, which comprises the steps that: at the presence of a precipitator with a pH value of 6-9, ferric nitrate, copper nitrate and a titanium compound are deposited in water; a deposit is separated and mixed with potassium carbonate and silica sol after being washed; a mixture obtained is dried and calcined. The iron catalyst with the assistant of titanium structure has relatively large specific surface area, CO conversion activation and antiwelding and antisulphour properties.

Description

technical field [0001] The present invention is used to catalyze CO, H 2 Precipitated iron catalyst containing titanium and other additives for the Fischer-Tropsch synthesis reaction where the main synthesis gas is converted into a variety of target hydrocarbon products. The invention also relates to a process for the preparation of this catalyst. Background technique [0002] The Fischer-Tropsch catalytic synthesis process is well known to contain CO, H 2 It is an efficient way to convert mainly syngas into chemical feedstocks and liquid hydrocarbon products. Among them, the application of precipitated iron catalyst in this process has been extensively studied, and can achieve high catalytic activity. After the addition of effective additives Cu, K, and Mn, the precipitated iron catalyst has significantly improved its activity and the selection of heavy products. However, it is very easy to break into micron-sized particles during the operation of reactors producing high...

Claims

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Application Information

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IPC IPC(8): B01J23/78C07C1/04
Inventor 吕毅军石玉林刘宗健
Owner CHNA ENERGY INVESTMENT CORP LTD
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