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Iron-based catalyst for ft synthesis and preparation thereof

An iron-based catalyst and Fischer-Tropsch synthesis technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, and hydrocarbon production from carbon oxides, can solve the problem of low selectivity and achieve The effect of increasing the specific surface area and increasing the pore volume

Active Publication Date: 2008-06-18
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 by the present invention is to provide a new catalyst C5+ for the low selectivity of the prior art. Iron-based Fischer-Tropsch synthesis catalyst with higher reaction selectivity and preparation method thereof

Method used

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preparation example Construction

[0018] When the catalyst contains a matrix, the preparation method of the catalyst further includes the step of introducing the matrix into the catalyst. As for the method of introducing the matrix, the present invention is not particularly limited. When there are optional water-soluble precursors in the substrate (such as the precursor of aluminum oxide water-soluble aluminum-containing salt, the precursor of silicon oxide water glass, the magnesium oxide precursor water-soluble magnesium-containing salt, etc.), the preferred method can be In the step (1) of the method, the water-soluble precursor of the matrix is ​​mixed with water and the organic reducing agent at the same time, and dissolved into a mixed solution, or the water-soluble After the precursor of the matrix is ​​mixed with water alone and dissolved into a solution, then the solution is mixed with the solution formed by mixing the iron-containing compound, the organic reducing agent and water, and dissolved; The...

Embodiment 1

[0032] 50 grams of iron nitrate, 2 grams of copper nitrate, and 5 grams of aluminum nitrate were dissolved in deionized water to prepare a solution of 70 milliliters; weigh urea [CO(NH 2 ) 2 , the same below] 32 grams, prepared into 50 ml of solution; mix the two solutions and stir them evenly, place them in a muffle furnace and heat them until they catch fire, and after the organic reducing agent is burned off, a fluffy foamy powder is obtained, and then heated at 500 ° C and In the presence of air, the powder was continuously calcined in a muffle furnace for 3 hours to obtain catalyst A. The composition, specific surface area and pore volume of Catalyst A are listed in Table 1.

Embodiment 2

[0034] 50 grams of ferric nitrate, 2 grams of manganese nitrate [Mn(NO 3 ) 2 ·6H 2 O], 5 grams of aluminum nitrate, are dissolved in deionized water, and are mixed with the solution of 70 milliliters; Weigh citric acid (C 6 h 8 o 7 ·H 2 (2, the same below) 26 grams, prepared into 50 milliliters of solution; the two solutions were mixed and stirred evenly, placed in a muffle furnace and heated to ignite and burned, and the organic reducing agent was burned to obtain a fluffy foamy powder material, and then heated at 500 ° C In the presence of air, the powder was continuously calcined in a muffle furnace for 4 hours to obtain catalyst B. The composition, specific surface area and pore volume of Catalyst B are listed in Table 1.

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Abstract

Disclosed is an iron-based catalyst for ft synthesis, containing ferrous metal components of useful quality. The catalyst is characterized in that the specific surface area of the catalyst is more than 255 squaremeters / g- 320 squaremeters / g and the pore volume is more than 0.45ml / g-0.7ml / g. the preparation method includes: (1) at least one iron-compound and at least one organic reducing agent are mixed or dissolved with water into solution; (2) the solution is heated to combustion under the oxygen-containing condition, so that organic reducing agent is burned up and a powder product is got; (3) in the presence of the air, the powder product is roasted at 100-1000DEG.C for 0.5-30 hours and then the catalyst provided by the invention is got. The catalyst can maintain relatively high reacting activity, as well as better selectivity for C5+.

Description

technical field [0001] The invention relates to a Fischer-Tropsch synthesis catalyst and a preparation method thereof, in particular to an iron-based Fischer-Tropsch synthesis catalyst and a preparation method thereof. Background technique [0002] Fischer-Tropsch synthesis refers to the conversion of synthesis gas (a mixture of carbon monoxide and hydrogen) into hydrocarbons in the presence of a catalyst. Catalysts suitable for the Fischer-Tropsch synthesis reaction are many, and these catalysts usually contain a metal component selected from iron, cobalt and ruthenium and an inert support. Among them, iron-based catalysts are cheap and easy to obtain, and have better sulfur tolerance than cobalt catalysts, and are especially suitable for the Fischer-Tropsch synthesis process of coal-to-synthesis gas. [0003] The introduction of other promoter metal components into iron-based catalysts can further adjust and improve catalyst performance. For example: the introduction of ...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J23/83B01J23/86B01J23/70C07C1/04
Inventor 侯朝鹏夏国富孙霞王倩刘斌吴昊李明丰聂红李大东
Owner CHINA PETROLEUM & CHEM CORP
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