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Fe-based catalyst, preparation method thereof and application thereof for preparing aromatic hydrocarbons through one-step method by synthesis gas

A catalyst, synthesis gas technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of poor catalyst stability, low metal dispersion, low aromatics selectivity, etc.

Inactive Publication Date: 2019-10-25
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problems of low selectivity of aromatics, poor catalyst stability and low metal dispersion in the catalytic process of producing aromatics from syngas

Method used

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  • Fe-based catalyst, preparation method thereof and application thereof for preparing aromatic hydrocarbons through one-step method by synthesis gas
  • Fe-based catalyst, preparation method thereof and application thereof for preparing aromatic hydrocarbons through one-step method by synthesis gas
  • Fe-based catalyst, preparation method thereof and application thereof for preparing aromatic hydrocarbons through one-step method by synthesis gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] Weigh 808g of ferric nitrate and dissolve it in 1000g of deionized water, and fully stir at 50°C for 2h to obtain solution I;

[0095] Weigh 100g of aluminum chloride and 50.83g of magnesium chloride and dissolve them in 500g of deionized water respectively, mix them, and fully stir at 50°C for 2 hours to obtain solution II;

[0096] Weigh 544 g of ammonia water (25%), add 100 g of deionized water to the ammonia water, and fully stir at 30° C. for 2 h to obtain solution III.

[0097] Slowly add solution I and solution II into the ammonia solution (solution III) sequentially and dropwise under agitation at a temperature of 60°C, then age at 30°C for 6 hours, and finally the solid-liquid mixture is centrifuged to collect the precipitate, After washing to neutrality, dry at 120 °C for 4 h, then transfer to a tube furnace and bake at 800 °C for 12 h to obtain spinel material (Al 0.75 Mg 0.25 Fe 2 o 4 ).

[0098] Weigh 62.1g of calcium nitrate and dissolve it in 100g of...

Embodiment 2

[0105] Adopt the method consistent with embodiment 1 and proportioning to make Fe-2#.

[0106] Weigh 200g of MFI molecular sieve (silicon to aluminum ratio 54), add 3600g of tetraethylammonium hydroxide solution (0.8mol / L), stir at 85°C for 12h, filter and wash, then dry at 70°C for 12h , and finally fired at 500°C for 5h to obtain Z-2#.

[0107] Calculated by mass percentage, 10 g of spinel Fe-2# and 40 g of molecular sieve Z-2# powder were thoroughly mixed and then pressed into tablets to obtain the Fe-based catalyst provided by the present invention.

[0108] Among them, the mass percentages of each component are as follows: Fe-based spinel Al 0.75 Mg 0.25 Fe 2 o 4 : 18.6%, basic modified TON molecular sieve: 80.0%, oxide additive calcium oxide CaO: 1.4%.

[0109] The reaction condition of catalyst evaluation is: H 2 / CO=1.2, airspeed is 4500h -1 , the reaction temperature is 320°C, the reaction pressure is 0.5MPa, and the reaction results are listed in Table 1.

Embodiment 3

[0111] Weigh 963g of iron acetylacetonate and dissolve it in 1500g of ethanol, and fully stir at 65°C for 1.2h to obtain solution I;

[0112] Weigh 59.5g of zinc nitrate and 174.4g of cobalt acetate and dissolve them in 500g of deionized water respectively, mix them, and fully stir at 40°C for 2.5h to obtain solution II;

[0113] Weigh 256 g of sodium hydroxide, add 400 g of deionized water to the ammonium hydroxide, and fully stir at 45° C. for 1.5 h to obtain solution III.

[0114] Slowly add solution I and solution II to the sodium hydroxide solution (solution III) successively under stirring at a temperature of 75°C, then age at 70°C for 4 hours, and finally the solid-liquid mixture is centrifuged and washed After reaching neutrality, it was dried at 70°C for 24h, and then transferred to a tube furnace for calcination at 750°C for 5h to obtain a spinel material (Co 0.78 Zn 0.22 Fe 2 o 4 ).

[0115] Weigh 10.2g of cerium nitrate and dissolve it in 100g of water to obta...

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Abstract

The invention discloses an Fe-based catalyst for preparing aromatic hydrocarbons through a one-step method by synthesis gas and a preparation method of the Fe-based catalyst. The Fe-based catalyst isprepared from a Fe-based spinel material, molecular sieve zeolite and a metal oxide auxiliary agent, wherein the content of the Fe-based spinel material is 9.95%-79.95%, the zeolite molecular sieve is20%-90%, and the oxide auxiliary agent is 0.05-20%. The Fe-based catalyst couples preparation of olefin by the synthesis gas with aromatization reaction of the olefin, and because the spinel materialhas high structural stability and Fe dispersibility in catalytic reaction and high reactivity, light aromatics selectivity and stability are maintained during the 1000h synthesis gas catalytic conversion process, the technical problems of low aromatics selectivity, poor catalyst stability and high content of polycyclic aromatic hydrocarbons in the process preparing the aromatic hydrocarbon from the synthesis gas are solved; and the catalyst synthesis cost is low, the operation is simple, and the Fe-based catalyst and the preparation method are suitable for large-scale industrial production ofthe aromatic hydrocarbons from the synthetic gas.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to an Fe-based catalyst for preparing aromatics from synthesis gas in one step and a preparation method thereof. Background technique [0002] Aromatics (including benzene, toluene, xylene, referred to as BTX) are important basic organic raw materials, which can be derived from a variety of product chains. [0003] At present, the production of aromatics at home and abroad mainly relies on petroleum resources. In aromatics production units, aromatics products are obtained through hydrogenation, reforming, aromatics conversion, and separation under the conditions of catalysts and high temperature and pressure. However, the reserves of fossil fuels such as petroleum are limited, the price of crude oil is constantly increasing, and the cost of the petroleum-led chemical industry is also rising. Therefore, the development of a process route for producing aromat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/76B01J29/46B01J29/14B01J29/80C10G2/00
CPCB01J23/005B01J29/14B01J29/46B01J29/7615B01J29/7684B01J29/80C10G2/334C10G2400/30
Inventor 刘粟侥杨勇王洪青明王珏张昱白云坡任利荣王有良冯景丽李永旺
Owner SYNFUELS CHINA TECH CO LTD
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