Fischer-Tropsch synthesis catalyst, and preparation method and application thereof

A technology of Fischer-Tropsch synthesis and catalysts, which is applied in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, physical/chemical process catalysts, etc., can solve the problems of selectivity reduction, achieve the improvement of reduction degree, improve stability, and improve the operation process simple effect

Active Publication Date: 2015-05-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CH of the above techniques 4 Selectivity needs to be further reduced, C 5 + Selectivity needs to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Take 20.7gCo(NO 3 ) 2 ﹒ 6H 2 O and 2.3gNi(NO 3 ) 2 ﹒ 6H 2 Put O into a 500mL beaker so that the molar ratio of Co to Ni is 0.9 / 0.1, add 100mL of distilled water, then place the beaker in a water bath at 80°C, stir at 400rpm, and stir until completely dissolved. Take 30.87g La(NO 3 ) 3 ﹒ 6H 2 O and 0.8g KNO 3 Put it into a beaker with 100mL of distilled water and stir until it is completely dissolved so that the molar ratio of La to K is 0.9 / 0.1. Then add the lanthanum nitrate and potassium nitrate solutions dropwise to the cobalt nitrate and nickel nitrate solutions, and stir while adding. Take 40g of citric acid, the molar ratio of citric acid to the total amount of metal ions is 1.2:1, put it into a 100mL beaker and stir until it is completely dissolved. At this time, after the above mixed solution is stirred for 30 minutes, slowly add the citric acid solution, while Add dropwise while stirring. After stirring for 5 hours, the brown solution had been deh...

Embodiment 2

[0020] Take 21.85gCo(NO 3 ) 2 ﹒ 6H 2 O and 1.15gNi(NO 3 ) 2 ﹒ 6H 2 Put O into a 500mL beaker so that the molar ratio of Co to Ni is 0.95 / 0.05, add 100mL of distilled water, then place the beaker in a water bath at 80°C, stir at 400rpm, and stir until completely dissolved. Take 29.15g La(NO 3 ) 3 ﹒ 6H 2 O and 1.2g KNO 3 Put it into a beaker with 100mL of distilled water, stir until it is completely dissolved, so that the molar ratio of La to K is 0.85 / 0.15. Then add the lanthanum nitrate and potassium nitrate solutions dropwise to the cobalt nitrate solution, and stir while adding. Take 60g of citric acid, the molar ratio of citric acid to metal ions is 1.8:1, put it into a 100mL beaker and stir until it is completely dissolved. At this time, after the above mixed solution is stirred for 30 minutes, slowly add the citric acid solution, while Add dropwise while stirring. After stirring for 5 hours, the brown solution had been dehydrated and turned into a viscous ge...

Embodiment 3

[0022] Take 16.1gCo(NO 3 ) 2 ﹒ 6H 2 O and 6.9gNi(NO 3 ) 2 ﹒ 6H 2Put O into a 500mL beaker so that the molar ratio of Co to Ni is 0.7 / 0.3, add 100mL of distilled water, then place the beaker in a water bath at 80°C, stir at 400rpm, and stir until completely dissolved. Take 27.44g La(NO 3 ) 3 ﹒ 6H 2 O and 1.6g KNO 3 Put it into a beaker with 100mL of distilled water and stir until it is completely dissolved so that the molar ratio of La to K is 0.8 / 0.2. Then add the lanthanum nitrate and potassium nitrate solutions dropwise to the cobalt nitrate solution, and stir while adding. Take 80g of citric acid, the molar ratio of citric acid to the total amount of metal ions is 2.4:1, put it into a 100mL beaker and stir until it is completely dissolved. At this time, after the above mixed solution is stirred for 30 minutes, slowly add the citric acid solution, while Add dropwise while stirring. After stirring for 5 hours, the brown solution had been dehydrated and turned in...

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PUM

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Abstract

The invention discloses a Fischer-Tropsch synthesis catalyst, and a preparation method and an application thereof. The catalyst is a composite metal oxide with a perovskite structure, and the general formula of the catalyst is A<x>A'<1-x>B<y>B'<1-y>O<3>, wherein A is rare earth metal lanthanum, A' is metallic potassium, B is transition metal nickel, B' is transition metal cobalt, x is greater than 0.7 and smaller than 1, and y is greater than 0 and smaller than 0.35. The preparation method of the cobalt-based Fischer-Tropsch synthesis catalyst comprises the following steps: preparing a solution with cobalt nitrate, nickel nitrate, potassium nitrate and lanthanum nitrate as precursors and citric acid or glycol as a complexing agent, uniformly stirring, carrying out water evaporation to make the solution become a viscous gel from a transparent sol, drying, and roasting to obtain the composite oxide Fischer-Tropsch synthesis catalyst with the perovskite structure. The catalyst can be applied to Fischer-Tropsch synthesis reactions. The catalyst can be adopted to make the CO conversion rate reach 90% or more and guarantee very high C<5><+> selectivity.

Description

technical field [0001] The invention relates to a Fischer-Tropsch synthesis catalyst and its preparation method and application, belonging to the catalytic technology in the field of Fischer-Tropsch synthesis. Background technique [0002] Fischer-Tropsch synthesis refers to the reaction in which synthesis gas (carbon monoxide and hydrogen) is catalyzed on a catalyst to synthesize hydrocarbon liquid fuels. Fischer-Tropsch synthesis has the advantages of not relying on petroleum and clean products. With the transformation of the world's energy structure from a single oil-dependent type to a joint supply of coal, oil and natural gas, and the increasing requirements for environmental protection, Fischer-Tropsch synthesis technology will surely develop rapidly. [0003] Efficient cobalt-based Fischer-Tropsch catalyst is one of the key technologies in Fischer-Tropsch synthesis technology. Major oil companies have successively developed amorphous SiO 2 、TiO 2 and Al 2 o 3 Cob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C10G2/00
Inventor 倪向前张舒冬尹泽群李杰陈楠
Owner CHINA PETROLEUM & CHEM CORP
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