Iron catalyst, preparation method and its application in synthesizing hydrocarbon reaction

An iron catalyst and catalyst technology, applied in the direction of hydrocarbon production from carbon oxides, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low cooling rate, difficulty in forming grain catalysts, etc., to avoid easy loss, Stable Fischer-Tropsch reaction activity, high activity effect

Active Publication Date: 2008-04-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cooling method used in this method has a low cooling rate, and it is difficult to form a catalyst with finer grains.

Method used

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  • Iron catalyst, preparation method and its application in synthesizing hydrocarbon reaction
  • Iron catalyst, preparation method and its application in synthesizing hydrocarbon reaction
  • Iron catalyst, preparation method and its application in synthesizing hydrocarbon reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 500g of iron and 500g of aluminum into the graphite crucible, and heat it in a high-frequency furnace to above 1300°C to melt and alloy it, and then use inert gas or hydrogen to spray the alloy liquid from the nozzle of the crucible to a certain speed On the copper roller of 670 rpm, cooling water is passed through the copper roller, and the alloy liquid is 10 6 After rapid cooling at the cooling rate of ℃ / s, it is thrown out along the tangent line of the copper roll to form scale-like strips. The scale-like strips are ground to a particle diameter of less than 50 microns to obtain a master alloy.

[0033] Slowly add 50 g of the master alloy into a three-neck flask filled with 500 g of 20% aqueous sodium hydroxide solution, control its temperature to 80° C. and keep stirring at constant temperature for 1 hour. After stopping heating and stirring, decant the liquid and wash with distilled water at 80°C until the pH value is 7. The prepared catalyst is numbered Catal...

Embodiment 2

[0040] Add 1.0kg of iron and 2.0kg of aluminum into the graphite crucible, heat it in a high-frequency furnace to above 1300°C to melt and alloy it, and then use inert gas or hydrogen to spray the alloy liquid from the nozzle of the crucible to a Rotating speed is on the copper roller of 670 rev / mins, passes cooling water in the copper roller, and alloy liquid is with 10 6 After rapid cooling at the cooling rate of ℃ / s, it is thrown out along the tangent line of the copper roll to form scale-like strips. The scale-like strips are ground to a particle diameter of less than 500 microns to obtain a master alloy.

[0041] Slowly add 50 g of the master alloy into a three-neck flask filled with 500 g of 20% aqueous sodium hydroxide solution, control its temperature to 100° C. and keep stirring at constant temperature for 1 hour. After the heating and stirring were stopped, the liquid was decanted, washed with distilled water at 80°C until the pH value was 7, and the prepared catalys...

Embodiment 3

[0047] Add 480g of iron, 480g of aluminum and 40g of copper into the graphite crucible, heat it in a high-frequency furnace to above 1600°C and melt it to alloy it, and then use inert gas or hydrogen to spray the alloy liquid from the nozzle of the crucible to the On a copper roll whose rotating speed is 670 rpm, cooling water is passed through the copper roll, and the alloy liquid is cooled by 10 6 The cooling rate of ℃ / s is rapidly cooled and thrown out along the tangent line of the copper roller to form scaly strips, which are ground to a particle diameter of less than 500 microns.

[0048] Then 50 g of the master alloy was slowly added into a three-necked flask filled with 500 g of 20% aqueous sodium hydroxide solution, and the temperature was controlled to be 100° C. and stirred at constant temperature for 1 hour. After stopping heating and stirring, decant the liquid and wash with distilled water at 80°C until the pH value is 7. The prepared catalyst is numbered Catalys...

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Abstract

The present invention discloses an iron catalyst. It is characterized by that said catalyst is formed from 30-95wt% of iron, 0.5-30wt% of aluminium and 0-40wt% of at least one transition metal M selected from subgroups of IB, IIB, IIIB, IVB, VIB, VIIB and VIIIB of periodic table of chemical elements. The iron is existed by mainly adopting metal state form of nano grains. Said catalyst can be obtained by adopting rapid coagulation process to make molten alloy be quickly solidified according to cooling rate greater than 1000deg.C / S to obtain fast-cooled alloy, then utilizing alkali extraction process to remove aluminium from alloy. When said catalyst is used for making Fischer-Tropsch synthesis reaction, as compared with skeleton iron it possesses high activity and selectivity.

Description

technical field [0001] The invention relates to an iron catalyst, its preparation method and its application in the preparation of hydrocarbons by Fischer-Tropsch reaction using syngas as raw material. Background technique [0002] The Fischer-Tropsch synthesis reaction was discovered in the 1920s by synthesis gas (H 2 +CO) a method of synthesizing liquid fuels. Since the 1950s, large-scale industrialization of synthesizing liquid fuels from coal-based syngas has been realized in South Africa. In recent years, with the transformation of the world's energy structure from a single petroleum energy structure to coal, natural gas and petroleum co-supply, and the increasing global environmental protection requirements, Fischer-Tropsch synthesis using natural gas and coal-based syngas as raw materials has the advantage of not relying on petroleum. , product cleanness (does not contain sulfur, nitrogen, aromatic hydrocarbon), etc., has attracted the attention of countries all over...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/835B01J23/889C07C1/04
Inventor 张晓昕孟祥堃宗保宁慕旭宏王宣
Owner CHINA PETROLEUM & CHEM CORP
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