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Fischer synthesis method for highly selectively producing liquid hydrocarbon

A Fischer-Tropsch synthesis, high-selectivity technology, applied in liquid hydrocarbon mixture recovery, petroleum industry, etc., can solve the problem of low selectivity and achieve high selectivity, low selectivity, and high conversion

Active Publication Date: 2008-05-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention is to aim at C in existing Fischer-Tropsch synthesis technology 5 + selectivity for small defects, providing a new, C 5 + Fischer-Tropsch synthesis method with higher selectivity

Method used

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preparation example Construction

[0016] When the catalyst also contains one or more additive components known in the art, such as containing selected from Li, Na, K, Mg, Ca, Sr, Cu, Mo, Ta, W, Ru, When one or more additive components in Zr, Ti, REO, Re, Hf, Ce, Mn, Fe, V, Pt, Pd, Rh or Ir, the preparation method of the catalyst also includes introducing in the catalyst The steps of the auxiliary components. The method for introducing the additive is not particularly limited in the present invention, and the preferred method may be to directly mix the solution containing the additive component with cobalt-aluminum spinel and alumina and / or alumina precursors and roast It may also be prepared by directly mixing the compound containing the auxiliary component with The solution is introduced by mixing method. Calculated by oxide and based on the total amount of the catalyst, the amount of the promoter-containing compound should be such that the content of the promoter in the final catalyst does not exceed 30% b...

Embodiment 1

[0024] 29.1 grams of cobalt nitrate hexahydrate, 131.2 grams of aluminum nitrate nonahydrate and 67.5 grams of urea are dissolved in 200 milliliters of deionized water (the ratio of the sum of cobalt and aluminum atoms to the molar number of cosolvent is 1: 2.5), the The solution is placed in a muffle furnace and heated until it catches fire. After the organic co-solvent is burned off, a fluffy and foamy powder material is obtained. Then, the powder material is continuously roasted in a muffle furnace at 500°C for 3 hours in the presence of air to obtain a catalyst C1 , The RT value and composition of C1 are listed in Table 1.

Embodiment 2

[0026] 29.1 grams of cobalt nitrate hexahydrate, 225 grams of aluminum nitrate nonahydrate and 105 grams of urea were dissolved in 300 milliliters of deionized water (the ratio of the number of cobalt and aluminum atoms to the molar ratio of cosolvent was 1: 2.5), the The solution was placed in a muffle furnace and heated until it ignited and burned. After the organic co-solvent was burned off, a fluffy and foamy powder material was obtained. Under the condition of 500°C and air, the powder material was continuously roasted in a muffle furnace for 3 hours to obtain catalyst C2. The RT values ​​and compositions of C2 are listed in Table 1.

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Abstract

Provided is a highly selective fischer-tropsch process for producing liquid hydrocarbon, which comprises that a mixing air of hydrogen and carbonic oxide is contacted with an catalyst under fischer-tropsch synthesis condition. The process is characterized in that the catalyst contains efficient quantity of cobalt metal component and oxide of alumina, wherein the RT value of the cobalt metal component is 400 DEG C to 1000 DEG C, the RT value is the summit temperature corresponding to the first reduction peak of the first reduction peak in a reduction spectrogram of cobalt which exists in an oxidation state form when representing the catalyst with the employment of temperature programmed reduction. Compared with the existing technology, the C5+ selectivity of the process provided by the invention is remarkably increased.

Description

technical field [0001] The present invention relates to a method for producing liquid hydrocarbons by Fischer-Tropsch synthesis. Background technique [0002] It is a good alternative petroleum technology to produce synthesis gas from carbon and hydrogen-containing resources such as natural gas, bitumen, coal, and biomass, and then use synthesis gas as raw material to produce liquid hydrocarbons through Fischer-Tropsch synthesis. [0003] People always try to obtain more C by improving the Fischer-Tropsch synthesis reaction process and / or catalyst 5 + product. There are many catalysts suitable for the Fischer-Tropsch synthesis reaction, and these catalysts generally contain a metal component selected from Group VIII of the periodic table of elements and an inert support. Among them, cobalt-based Fischer-Tropsch synthesis catalyst due to C 5 + With high selectivity, it is a commonly used catalyst in Fischer-Tropsch synthesis. [0004] By introducing other promoter metal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G5/00
Inventor 胡志海吴昊李毅聂红田鹏程侯朝鹏夏国富
Owner CHINA PETROLEUM & CHEM CORP
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