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Iron-based catalyst and preparation method thereof

A technology of catalyst and catalyst carrier, applied in the field of coal chemical industry, can solve problems such as easy agglomeration of iron-based catalysts

Inactive Publication Date: 2015-03-25
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The present invention aims to provide an iron-based catalyst and its preparation method to solve the problem that iron-based catalysts are easy to agglomerate under liquefaction conditions in the prior art

Method used

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  • Iron-based catalyst and preparation method thereof
  • Iron-based catalyst and preparation method thereof
  • Iron-based catalyst and preparation method thereof

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preparation example Construction

[0036] The preparation method provided by the present invention uses AlOOH, silicon dioxide and FeOOH as raw materials, and through slurry mixing and catalyst carrier introduction, an iron-based catalyst containing both structural additives AlOOH and silicon dioxide and active component FeOOH is obtained. The presence of AlOOH and silicon dioxide in the structural aid can reduce the particle size of the active ingredient FeOOH, making it ultra-fine and highly dispersed amorphous. At the same time, AlOOH can play the role of dispersing FeOOH particles, so that the generated FeOOH particles are not easy to agglomerate during the dehydration and drying process. Si atoms in silicon dioxide can enter the FeOOH crystal lattice and interact with Fe atoms to form a certain number of Fe-O-Si, thus playing the role of separating and dispersing FeOOH crystal grains. Furthermore, under the internal and external effects of AlOOH and silica, when the iron-based catalyst is under coal liquef...

Embodiment 1

[0051] Weigh 248.23g FeSO 4 ·7H 2 O and 34.72g Al(NO 3 ) 3 9H 2 O was added to 2000g deionized water, fully stirred and dissolved to obtain the first mixture; the concentrated ammonia water with a concentration of 27wt% was added to deionized water to form a dilute ammonia solution, and then 10.71g of SiO-containing 2 The silica sol with a concentration of 30 wt% and a pH value of 9 is added to the prepared ammonia solution, fully stirred and mixed uniformly to form a second mixture;

[0052] Using a peristaltic pump, the above-mentioned first mixture and the second mixture were added into a 10L reactor containing 1000g of water in parallel to carry out precipitation reaction. Wherein, the reactor is kept warm by circulating water in the jacket to control the reaction temperature to be 45° C., the feed time of the first mixture is 25 minutes, and the feed rate of ammonia water is controlled to maintain the reaction pH value at 7.0. After the first mixture was fed, compres...

Embodiment 2

[0055] Weigh 248.23g FeSO 4 ·7H 2 O and 104.17g Al(NO 3 ) 3 9H 2 O was added to 2000g deionized water, fully stirred and dissolved to obtain the first mixture; the concentrated ammonia water with a concentration of 27wt% was added to deionized water to form a dilute ammonia solution, and then 12.86g of SiO-containing 2 The silica sol with a concentration of 30 wt% and a pH value of 9 is added to the prepared ammonia solution, fully stirred and mixed uniformly to form a second mixture;

[0056] Using a peristaltic pump, the above-mentioned first mixture and the second mixture were added into a 10L reactor containing 1000g of water in parallel to carry out precipitation reaction. Wherein, the reactor is kept warm by circulating water in the jacket to control the reaction temperature to be 45°C, the feed time of the first mixture is 25 minutes, and the feed rate of ammonia water is controlled to maintain the reaction pH value as 7.0; the first After the mixture solution was ...

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Abstract

The invention discloses an iron-based catalyst and a preparation method thereof. The catalyst comprises an active ingredient, a structural promoter and a catalyst carrier, wherein the active ingredient comprises FeOOH; and the structural promoter comprises AlOOH and silicon dioxide. In the catalyst, the Al atoms can perform partial substitution with Fe atoms so as to form FexAl1-xOOH, the effect of dispersing the active ingredient is achieved, the particle size of the FeOOH particles is reduced, and aggregation of the catalyst in the dehydrating and drying process is inhibited. Moreover, the Si atom in the silicon dioxide can act with the Fe atom so as to form Fe-O-Si ions of a certain number, so that the effect of separating and dispersing the FeOOH crystalline grains is achieved. Therefore, the catalyst has high dispersity in the coal liquefaction process.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to an iron-based catalyst and a preparation method thereof. Background technique [0002] The direct liquefaction of coal to produce liquid fuel is an important way for the clean conversion and efficient utilization of coal, and it is also one of the effective means to make up for the shortage of petroleum resources. my country's energy resources are rich in coal, short of oil, and low in gas. In 2009, my country's dependence on crude oil imports exceeded 50%, and in 2013 it reached 60%. The increasing dependence on foreign crude oil means that the situation of social production and energy security in our country will become more severe. As a strategic energy reserve technology, direct coal liquefaction has always been highly valued by developed countries, and advanced coal direct liquefaction processes such as NEDOL, IGOR and HTI have been successfully developed. my country'...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745
Inventor 谢晶李克健章序文高山松
Owner CHNA ENERGY INVESTMENT CORP LTD
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