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Catalyst for preparing light aromatic hydrocarbon by synthetic gas one-step process, and preparation method and application thereof

A light aromatic hydrocarbon and catalyst technology, which is applied in the field of high-efficiency dual-functional integrated catalysts, can solve the problems of catalyst activity temperature mismatch, achieve excellent high-temperature activity and stability, excellent shape selectivity, and improve single-pass conversion.

Inactive Publication Date: 2018-01-26
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] For this reason, what the present invention is to solve is the technical problem that the catalysts used in the prior art for syngas one-step preparation of light aromatic hydrocarbons do not match the active temperature of the two catalysts. At the same time, a composite catalyst with high activity is developed to provide a CO Bifunctional composite catalyst with high single-pass conversion and BTX selectivity and preparation method thereof

Method used

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  • Catalyst for preparing light aromatic hydrocarbon by synthetic gas one-step process, and preparation method and application thereof
  • Catalyst for preparing light aromatic hydrocarbon by synthetic gas one-step process, and preparation method and application thereof
  • Catalyst for preparing light aromatic hydrocarbon by synthetic gas one-step process, and preparation method and application thereof

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Embodiment 1

[0042] (1) Ferric nitrate and manganese nitrate are added to the distilled water that temperature is 65 ℃, be mixed with the mixed aqueous solution of metal nitrate, guarantee that the molar fraction of iron ion in the mixed aqueous solution of metal nitrate obtained is 1mol / L, the molar fraction of manganese ion 1.5mol / L;

[0043] (2) Mix 100mL ammonia water and 100mL deionized water to make an alkaline solution, add the alkaline solution and metal nitrate dropwise to 200ml deionized water, control the pH value to 8, and age for 2 hours. After suction filtration and washing, Dry at 120°C for 12h, finally move to a muffle furnace, calcinate at 350°C for 4h, and crush to below 200 mesh to obtain Fischer-Tropsch synthesis catalyst Fe 2 o 3 -MnO;

[0044] (3) Weigh a certain mass of (NH 4 ) 6 Mo 7 o 24 4H 2 O, prepare 25ml of ammonium molybdate solution, adopt the equal volume impregnation method, drop the ammonium molybdate solution onto the 5g ZSM-5 carrier, ensure that ...

Embodiment 2

[0049] (1) Ferric nitrate and manganese nitrate are added to the distilled water that temperature is 65 ℃, be mixed with the mixed aqueous solution of metal nitrate, guarantee that the molar fraction of iron ion in the mixed aqueous solution of metal nitrate obtained is 1mol / L, the molar fraction of manganese ion 1.5mol / L;

[0050] (2) Mix 100mL ammonia water and 100mL deionized water to make an alkaline solution, add the alkaline solution and metal nitrate dropwise to 200ml deionized water, control the pH value to 8, and age for 2 hours. After suction filtration and washing, Dry at 120°C for 12h, finally move to a muffle furnace, calcinate at 350°C for 4h, and crush to below 200 mesh to obtain Fischer-Tropsch synthesis catalyst Fe 2 o 3 -MnO;

[0051] (3) Weigh a certain mass of (NH 4 ) 6 Mo 7 o 24 4H 2 O, prepare 25ml of ammonium molybdate solution, adopt the equal volume impregnation method, drop the ammonium molybdate solution onto the 5g ZSM-5 carrier, ensure that ...

Embodiment 3

[0056] (1) Ferric nitrate and manganese nitrate are added to the distilled water that temperature is 65 ℃, be mixed with the mixed aqueous solution of metal nitrate, guarantee that the molar fraction of iron ion in the mixed aqueous solution of metal nitrate obtained is 1mol / L, the molar fraction of manganese ion 1.5mol / L;

[0057] (2) Mix 100mL ammonia water and 100mL deionized water to make an alkaline solution, add the alkaline solution and metal nitrate dropwise to 200ml deionized water, control the pH value to 9, and age for 2 hours. After suction filtration and washing, Dry at 120°C for 12h, finally move to a muffle furnace, calcinate at 350°C for 4h, and crush to below 200 mesh to obtain Fischer-Tropsch synthesis catalyst Fe 2 o 3 -MnO;

[0058] (3) Weigh a certain mass of (NH 4 )6Mo 7 o 24 4H 2 O, prepare 25ml of ammonium molybdate solution, adopt the equal volume impregnation method, drop the ammonium molybdate solution onto the 5g ZSM-5 carrier, ensure that the...

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Abstract

The invention discloses a catalyst for preparing light aromatic hydrocarbon by synthetic gas one-step process, and a preparation method and an application thereof. The catalyst comprises a Fischer-Tropsch synthesis catalyst and an aromatization catalyst, wherein the Fischer-Tropsch synthesis catalyst includes an oxide of Fe and an oxide of Mn, and a composite metal oxide can fully improve the high-temperature Fischer-Tropsch synthesis activity; the aromatization catalyst is a modified molecular sieve with HZSM-5 as a carrier and with Mo and Ni double metals as active components, and the aromatization performance can be significantly improved. Through the combination of the two catalysts, series coupling of a Fischer-Tropsch synthesis reaction and an aromatization reaction is achieved, a one-way conversion rate of CO is increased obviously, and at the same time, a technology route for preparing light aromatic hydrocarbon-benzene, toluene and xylene (BTX) by synthetic gas one-step process is exploited. Experiments verify that the conversion rate of CO reaches up to 98% or more, the selectivity of hydrocarbonyl of aromatic hydrocarbon reaches 73% or more, and the selectivity of hydrocarbyl of BTX reaches 53%. The catalyst for preparing aromatic hydrocarbon by the synthetic gas one-step process has the advantages of relatively good catalytic activity, good stability and simple preparation, and has relatively good industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a catalyst for preparing light aromatics by one-step method of syngas and its preparation method and application, especially relates to a high-efficiency dual-function catalyst for preparing BTX by one-step method of synthesis gas in a fixed bed reactor Integrating catalysts and their preparation and application. Background technique [0002] Benzene, toluene, and xylene are important basic chemical raw materials, which are widely used in the production of the three major synthetic materials, the synthesis of fine chemicals, organic solvents, explosives, military industry, and pesticides. The demand continues to increase. It is the basic raw material of many fine chemical products, mainly used in the production of phenol, styrene and cyclohexane. Toluene can be used as a solvent and high-octane gasoline additive, and is also a raw material for the produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/48C10G2/00
Inventor 刘殿华程立科杨天慧焦冷康
Owner EAST CHINA UNIV OF SCI & TECH
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