Composite catalyst, preparation method and application thereof, and method for preparing aromatic hydrocarbon from synthesis gas through one-step method

A composite catalyst, synthesis gas technology, applied in molecular sieve catalysts, chemical instruments and methods, and hydrocarbon production from carbon oxides, etc., can solve the problems of high CO conversion and aromatics selectivity, and achieve improved aromatics selectivity and stability. , the effect of increasing the surface oxygen vacancy concentration

Pending Publication Date: 2022-07-12
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problem that the prior art catalysts for syngas one-step preparation of aromatics cannot simultaneously meet the high CO conversion rate and aromatics selectivity, improve a composite catalyst and its preparation method and application, a kind of synthesis gas A one-step method for producing aromatics. The composite catalyst has more active sites and CO adsorption sites, which effectively improves the conversion rate of CO and the selectivity of aromatics. At the same time, the preparation method of the composite catalyst is simple and convenient for industrial production

Method used

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  • Composite catalyst, preparation method and application thereof, and method for preparing aromatic hydrocarbon from synthesis gas through one-step method
  • Composite catalyst, preparation method and application thereof, and method for preparing aromatic hydrocarbon from synthesis gas through one-step method
  • Composite catalyst, preparation method and application thereof, and method for preparing aromatic hydrocarbon from synthesis gas through one-step method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Preparation of metal oxides :

[0079] (1) 10.125g Al (NO 3 ) 3 ·9H 2 O was dissolved in 50 mL of deionized water to obtain an aluminum salt solution; at 50 °C, the aluminum salt solution was mixed with (NH 4 ) 2 CO 3 Co-precipitation is carried out at a molar ratio of 1:1.5 to obtain a first mixture, wherein the aluminum salt solution is made of Al 3+ the mole meter;

[0080] (2) 60gCr (NO 3 ) 3 ·5H 2 O, 17.86gZn(NO 3 ) 2 ·9H 2 O, 10.77gMn (NO 3 ) 2 Dissolve in 250 mL of deionized water, stir continuously until all dissolved, then dilute to 300 mL to obtain a mixed salt solution; raise the temperature to 70 ° C, add mixed salt solution to the first mixture, and then add (NH 4 ) 2 CO 3 Carry out co-precipitation and adjust the pH value to 7.5 to obtain the second mixture;

[0081] (3) After aging the second mixture at 70°C for 5h, carry out suction filtration, wash the filter cake to neutrality, dry at 90°C for 12h, and finally calcinate at 350°C for ...

Embodiment 2

[0090] Preparation of metal oxides :

[0091] (1) 10.125g Al (NO 3 ) 3 ·9H 2 O was dissolved in 50 mL of deionized water to obtain an aluminum salt solution; at 50 °C, the aluminum salt solution was mixed with (NH 4 ) 2 CO 3 Co-precipitation is carried out at a molar ratio of 1:1.5 to obtain a first mixture, wherein the aluminum salt solution is made of Al 3+ the mole meter;

[0092] (2) 60gCr (NO 3 ) 3 ·5H 2 O, 26.79gZn(NO 3 ) 2 ·9H 2 O, 10.77gMn (NO 3 ) 2 Dissolve in 250 mL of deionized water, stir continuously until all dissolved, then dilute to 300 mL to obtain a mixed salt solution; raise the temperature to 70 ° C, add mixed salt solution to the first mixture, and then add (NH 4 ) 2 CO 3 Carry out co-precipitation and adjust the pH value to 7.5 to obtain the second mixture;

[0093] (3) After aging the second mixture at 70°C for 10h, carry out suction filtration, wash the filter cake to neutrality, dry at 90°C for 15h, and finally calcinate at 350°C for...

Embodiment 3

[0100] Preparation of metal oxides :

[0101] (1) 10.125g Al (NO 3 ) 3 ·9H 2 O was dissolved in 50 mL of deionized water to obtain an aluminum salt solution; at 50 °C, the aluminum salt solution was mixed with (NH 4 ) 2 CO 3 Co-precipitation is carried out at a molar ratio of 1:1.4 to obtain a first mixture, wherein the aluminum salt solution is made of Al 3+ the mole meter;

[0102] (2) 60gCr (NO 3 ) 3 ·5H 2 O, 26.79gZn(NO3 ) 2 ·9H 2 O, 16.07gMn (NO 3 ) 2 Dissolved in 250 mL of deionized water, stirring continuously, until all dissolved, then the volume was adjusted to 270 mL to obtain a mixed salt solution; the temperature was raised to 70 ° C, the mixed salt solution was added to the first mixture, and then (NH 4 ) 2 CO 3 Carry out co-precipitation and adjust the pH value to 7.5 to obtain the second mixture;

[0103] (3) After aging the second mixture at 70°C for 10h, carry out suction filtration, wash the filter cake to neutrality, dry at 90°C for 15h, an...

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Abstract

The invention relates to the technical field of aromatic hydrocarbon preparation, in particular to a composite catalyst, a preparation method and application thereof, and a method for preparing aromatic hydrocarbon from synthesis gas through a one-step method. The mass ratio of the metal oxide to the molecular sieve is (1-5): 1, the molecular formula of the metal oxide is MnxZnyCrzAl0. 1O4, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt, 0 lt and 0 lt; xlt; 1, 0lt; yt; Yt; 1.6, 1lt; zlt, zlt; (x + y) / z is equal to 0.3-1.5, and the molecular sieve is an HZSM-5 molecular sieve. When the composite catalyst provided by the invention is used for preparing aromatic hydrocarbon from synthesis gas by a one-step method, the CO conversion rate is greater than or equal to 19%, the aromatic hydrocarbon selectivity is greater than or equal to 75.8%, and the space-time yield of aromatic hydrocarbon is greater than or equal to 0.07 g / h.gcat; meanwhile, the composite catalyst provided by the invention has relatively high stability and long service life, and no obvious inactivation phenomenon exists when the composite catalyst stably runs for 100 hours.

Description

technical field [0001] The invention relates to the technical field of preparing aromatic hydrocarbons, in particular to a composite catalyst, a preparation method and application thereof, and a method for preparing aromatic hydrocarbons by one-step synthesis gas. Background technique [0002] Aromatic hydrocarbon is an important basic organic chemical raw material, and its derivatives are widely used in chemical products and fine chemicals such as fuel, petrochemical, chemical fiber, plastic and rubber. At present, aromatics are mainly produced from petroleum as feedstock, mainly from catalytic reforming process units in refineries. In addition, the aromatics production process of the petroleum route includes aromatics extraction technology, heavy aromatics lightening technology and light hydrocarbon aromatization technology. For countries with "rich coal and lean oil" energy structure, such as China, aromatics can also be produced through the coal chemical route. In the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/48B01J23/34C07C1/04C07C15/02
CPCB01J35/006B01J35/0046B01J29/48B01J23/002B01J23/34C07C1/043C07C1/0445B01J2229/186B01J2523/00B01J2523/27B01J2523/31B01J2523/67B01J2523/72C07C15/02Y02P20/52
Inventor 邢爱华尚蕴山
Owner CHNA ENERGY INVESTMENT CORP LTD
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