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An iron-based Fischer-Tropsch catalyst, its preparation method and application, and a Fischer-Tropsch synthesis method

A technology of Fischer-Tropsch synthesis and catalyst, which is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of inability to control the stability of silica sol and accelerate the development of silica sol itself. Cross-linking, changing the properties of silica sol, etc., to achieve the effect of high low-temperature activity, small average pore size, and large pore volume

Active Publication Date: 2019-04-09
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When this method mixes and heats silica sol with potassium oxalate and other electrolytes, it will accelerate the self-crosslinking of silica sol and greatly change the properties of silica sol itself. This method cannot control the stability of silica sol during implementation.

Method used

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  • An iron-based Fischer-Tropsch catalyst, its preparation method and application, and a Fischer-Tropsch synthesis method
  • An iron-based Fischer-Tropsch catalyst, its preparation method and application, and a Fischer-Tropsch synthesis method
  • An iron-based Fischer-Tropsch catalyst, its preparation method and application, and a Fischer-Tropsch synthesis method

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preparation example Construction

[0084] The invention provides an iron-based Fischer-Tropsch catalyst obtained according to the preparation method of the invention.

[0085] The invention provides the application of the iron-based Fischer-Tropsch catalyst described in the invention in Fischer-Tropsch synthesis.

[0086] The invention provides a Fischer-Tropsch synthesis method, which comprises: under Fischer-Tropsch synthesis conditions, contacting synthesis gas with a Fischer-Tropsch synthesis catalyst, wherein the Fischer-Tropsch synthesis catalyst is the iron-based Fischer-Tropsch synthesis catalyst described in the present invention catalyst.

[0087] According to the method of the present invention, preferably the Fischer-Tropsch synthesis conditions include: the temperature is 220-270°C, the H in the synthesis gas 2 The molar ratio to CO is (1-3):1.

preparation example 1

[0090] Weigh 10kg of Fe(NO 3 ) 3 9H 2 O, 0.22kg of Cu(NO 3 ) 2 ·3H 2 0, add the deionized water of 40L and stir to dissolve, obtain iron salt mixed solution;

[0091] Weigh 5.0kg of Na 2 CO 3 , 0.18kg potassium silicate, add 20L of deionized water and stir to dissolve to obtain a mixed solution of alkali and salt;

[0092] The above two mixed solutions were heated to above 70°C by means of jacket heating, and then the two pumps were used to flow the two into a vigorously stirred reactor for precipitation reaction, and the jacket of the reactor kept the temperature at 75°C. The pH value in the reactor was controlled to be 7.5 by adjusting the two pump speeds respectively, the stirring rate was 90 rpm, and the reaction time was 40 min. After the precipitation is completed, the precipitated slurry is vacuum filtered and washed repeatedly with deionized water until the conductivity of the filtrate is below 500 μS / cm, and the first filter cake 1 is obtained for use.

preparation example 2

[0094] Weigh 10kg of Fe(NO 3 ) 3 9H 2 O, 0.19kg of Cu(NO 3 ) 2 ·3H 2 0, add the deionized water of 40L and stir to dissolve, obtain iron salt mixed solution;

[0095] Weigh 5.3kg of Na 2 CO 3 , 0.15kg potassium silicate, add 20L of deionized water and stir to dissolve to obtain a mixed solution of alkali and salt;

[0096] Heat the above two mixed solutions to above 85°C respectively by means of jacket heating, and then use a pump to pump the iron salt mixed solution into the mixed solution of alkali and salt under vigorous stirring for precipitation reaction, and the jacket of the reaction kettle maintains the temperature 85°C;

[0097] Control the reaction time within 40 minutes, and finish the reaction when the pH is 7. After the precipitation is completed, the slurry is left to age for 1 hour, and then the precipitated slurry is quickly transferred to a water-cooled heat exchanger through a transfer pump to reduce the temperature of the slurry to below 40°C. Then...

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Abstract

The invention provides an iron-based Fischer-Tropsch catalyst, and a preparation method and an application thereof. The catalyst contains Fe, Cu and / or Mn, K and SiO2, is an amorphous catalyst and basically has no alpha-iron oxide, and pore channels, with the pore size of 1-12 nm, of the catalyst has the specific surface area of more than or equal to 130 m<2> / g and the pore volume of more than or equal to 0.200 cm<3> / g. The invention provides a Fischer-Tropsch synthetic method, wherein the method includes that synthetic gas makes contact with the Fischer-Tropsch synthetic catalyst under Fischer-Tropsch synthetic conditions. The catalyst has high low-temperature activity, for example, the catalyst can have the conversion rate of CO reaching 50% at the temperature of 240 DEG C.

Description

technical field [0001] The invention relates to an iron-based Fischer-Tropsch catalyst and its application, a method for preparing the catalyst, an iron-based Fischer-Tropsch catalyst obtained by the method, its application and a Fischer-Tropsch synthesis method. Background technique [0002] Fischer-Tropsch synthesis refers to synthesis gas (CO+H 2 ) Catalyze the reaction of synthesizing hydrocarbon liquid fuel on the catalyst. The iron-based catalyst is the most commonly used type of Fischer-Tropsch synthesis catalyst, because of its high water-gas shift activity, it is especially suitable for the Fischer-Tropsch synthesis reaction using coal-based synthesis gas with a low hydrogen-to-carbon ratio as a raw material. At present, the catalyst used by Sasol Company in South Africa, which has successfully realized the large-scale industrial operation of Fischer-Tropsch synthesis, is an iron-based catalyst. [0003] Due to the advantages of iron-based catalysts, there are mor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/78B01J23/83C10G2/00
Inventor 程萌武鹏石玉林王鹏朱加清吕毅军罗明生
Owner CHNA ENERGY INVESTMENT CORP LTD
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