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Fe base-molecular sieve catalyst used for Fischer Tropsch-oligomerization coupling reaction, and preparation method and application thereof

A technology of coupling reaction and catalyst, applied in molecular sieve catalyst, catalyst activation/preparation, preparation of liquid hydrocarbon mixture, etc. The effect of good stability

Active Publication Date: 2018-05-29
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional large-grain ZSM-5 molecular sieve has the problem of easy blockage and carbon deposition and deactivation due to its rich micropore channels.

Method used

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  • Fe base-molecular sieve catalyst used for Fischer Tropsch-oligomerization coupling reaction, and preparation method and application thereof
  • Fe base-molecular sieve catalyst used for Fischer Tropsch-oligomerization coupling reaction, and preparation method and application thereof

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preparation example Construction

[0029] Following embodiment is used for the preparation method of the Fe base-molecular sieve catalyst of Fischer-Tropsch-oligomerization coupling reaction, and its specific steps are as follows:

[0030] (1) Nano Fe 3 o 4 Preparation of the microsphere catalyst: dissolve the iron precursor in ethylene glycol at room temperature and stir evenly, then add sodium acetate to the solution and continue to stir evenly, the mass ratio of the iron precursor to sodium acetate is 3-4:8, and the obtained The solution was hydrothermally reacted at 200°C for 12 hours in the reaction vessel, then cooled naturally to room temperature, the black precipitate in the solution after the reaction was separated, and the black precipitate was washed several times with deionized water and ethanol, and then dried to obtain nano-Fe 3 o 4 microsphere catalyst;

[0031] (2) Preparation of nano-HZSM-5 catalyst: Mix deionized water, aluminum isopropoxide, TEOS and TPAOH at room temperature and stir well...

Embodiment 1

[0034] Catalyst preparation:

[0035] Nano Fe 3 o 4 Microsphere catalyst preparation: weigh 1.35g FeCl 3 ·6H 2 Dissolve O in 40mL of ethylene glycol, stir until a uniform solution is formed, then slowly add 3.6g of sodium acetate, continue stirring for 30min until a uniform solution is formed, then transfer the solution to a 70mL polytetrafluoroethylene hydrothermal reaction kettle, seal it completely, The hydrothermal reaction was carried out at 200° C. for 12 h, and cooled to room temperature after the hydrothermal reaction was completed. The black precipitate in the solution after the reaction was separated, and the obtained black precipitate was washed 3 times with deionized water and ethanol, and then the black precipitate was transferred to a vacuum drying oven and dried at 60°C for 12 hours to obtain nano-Fe 3 o 4 microsphere catalyst.

[0036] Preparation of nanometer HZSM-5: Take 30mL deionized water, 0.34g aluminum isopropoxide, 13.89g TEOS and 13.56g TPAOH (th...

Embodiment 2

[0040] Nano Fe 3 o 4 The preparation method of microsphere catalyst and HZSM-5 catalyst is the same as embodiment 1, and difference is:

[0041] The Fe-based-molecular sieve catalyst system is realized by particle packing. Specifically as follows: the prepared Fe 3 o 4 Microsphere catalyst and nanometer HZSM-5 powder were granulated respectively to obtain particles of 40-60 mesh, and the Fe after granulation was weighed 3 o 4 and HZSM-5 particles each 0.5g, mixed uniformly to obtain a composite catalyst; 1g of Fe-based molecular sieve catalyst particles and 1g of quartz sand were mixed and packed into a fixed bed reaction tube, and the Fischer-Tropsch-oligomerization coupling reaction conditions were the same as in Example 1. The obtained oil phase product was detected by GC-MS and the statistical results were analyzed. The reaction results are shown in Table 1.

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Abstract

The invention provides a Fe base-molecular sieve catalyst used for Fischer Tropsch-oligomerization coupling reaction, and a preparation method and application thereof. A hydrothermal synthesis methodis adapted to respectively prepare hydrothermally stable nano Fe3O4 catalyst and nano HZSM-5 catalyst; the nano Fe3O4 catalyst and the nano HZSM-5 catalyst are coupled as an FT-Oli (Fischer Tropsch-oligomerization) catalytic system to be applied to FT-Oli coupling catalytic reaction to realize efficient catalytic conversion from olefin-rich synthesis gas to liquid hydrocarbon. The Fe base-molecular sieve catalyst has the advantages of wide raw material source, low cost and low reaction condition, the prepared catalyst system enables the Fischer Tropsch-oligomerization coupling reaction activity to be 90% or more, C5+hydrocarbon selectivity can be about 70%, and an effective carbon source in olefin synthesis gas is effectively utilized and is converted into liquid hydrocarbon. The Fe base-molecular sieve catalyst has the characteristics of simple process, environment protection, low carbon, high carbon utilization ratio, intensive product distribution and the like.

Description

Technical field: [0001] The invention belongs to the technical field of Fischer-Tropsch-oligomerization catalysts, and in particular relates to an Fe-based-molecular sieve catalyst used for Fischer-Tropsch-oligomerization coupling reactions and its preparation method and application. Background technique: [0002] Energy is the basis and support for the rapid development of today's society. With the increasingly serious climate problems and the consumption of traditional petrochemical resources, the development of clean fuels has received continuous attention worldwide. Biomass is a renewable carbon resource with a wide range of sources, and it is also the only sustainable carbon resource that can be directly converted into liquid hydrocarbon fuel. Therefore, the development of biomass synthetic liquid fuel technology is considered to be an alternative with the most development potential. One of the options. Bio-oil is obtained by pyrolysis conversion of biomass. It has the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/46B01J37/10C10G2/00C10G50/00
CPCB01J29/46B01J37/10C10G2/334C10G50/00
Inventor 王晨光张浅马隆龙仇松柏李宇萍陈伦刚
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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