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Preparation method and application of supported iron-based catalyst

An iron-based catalyst, supported technology, applied in catalyst activation/preparation, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of deactivation, poor dispersion of active metals, easy growth and sintering reaction, etc. Effect

Pending Publication Date: 2022-05-13
珠海市福沺能源科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to solve the problem that the carbon dioxide hydrogenation catalyst has poor dispersion of active metals and is easy to grow and sinter under long-term high-temperature reaction conditions to deactivate the reaction
The purpose of the present invention is to solve the problem that the carbon dioxide hydrogenation catalyst has poor dispersion of active metals and is easy to grow and sinter under long-term high-temperature reaction conditions to deactivate the reaction

Method used

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  • Preparation method and application of supported iron-based catalyst
  • Preparation method and application of supported iron-based catalyst
  • Preparation method and application of supported iron-based catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] The preparation process of sp-Fe / HZSM-5 catalyst is as follows:

[0072] The catalyst was prepared by a multi-angle drum sputtering device, and the surface of the target was cleaned before preparation, and the iron target (mass purity above 99.9%) was bombarded with Ar ions generated by a plasma generator for 30 minutes;

[0073] Put the carrier powder HZSM-5 molecular sieve (silicon to aluminum ratio 50) in the polygonal rotating barrel, and vacuum the barrel until the pressure reaches 9.9x10 -4 Below Pa;

[0074] Ar gas (volume purity above 99.9%) is introduced into the barrel, the flow rate is 15ml / min, and the pressure in the barrel is maintained at 2.0Pa;

[0075] The rotating speed of the polygonal drum is increased to 10 rpm, and the vibration rate outside the barrel is kept at 20 times / min, so that the nano-metal iron particles produced by the bombardment of the copper target by Ar ions are evenly deposited on the surface of the carrier;

[0076] After the spu...

Embodiment 2

[0084] sp-Fe / SiO 2 The catalyst preparation process is as follows:

[0085] The catalyst was prepared by a multi-angle drum sputtering device. Before preparation, the surface of the target was cleaned and treated, and the iron target (mass purity above 99.9%) was bombarded with Ar ions generated by a plasma generator for 20 minutes;

[0086] The carrier powder silica (specific surface area about 200m 2 / g) As for the multi-angle rotating barrel, vacuum the barrel until the pressure reaches 9.9x10 -4 Below Pa;

[0087] Ar gas (volume purity above 99.9%) is introduced into the barrel, the flow rate is 30ml / min, and the pressure in the barrel is maintained at 1.0Pa;

[0088] The rotating speed of the polygonal drum is increased to 20 rpm, and the vibration rate outside the barrel is kept at 30 times / min, so that the nano-metal iron particles produced by the bombardment of the copper target by Ar ions are evenly deposited on the surface of the carrier;

[0089] After the sputt...

Embodiment 3

[0094] The silica carrier (specific surface area of ​​about 200m 2 / g) is replaced with carbon nanotubes (CNT, multi-walled, with a specific surface area of ​​about 400m 2 / g), the rest of the preparation process is the same as above, and the catalyst is denoted as sp-Fe / CNT.

[0095] The carbon dioxide reaction results of the iron catalyst prepared in Table 3 compared with the traditional catalyst

[0096]

[0097]The evaluation experiment of carbon dioxide hydrogenation reaction shows that, compared with the im-Fe / CNT catalyst prepared by the traditional impregnation method, the sp-Fe / CNT iron catalyst prepared by the magnetron sputtering method has a higher carbon dioxide reaction rate in the carbon dioxide reaction. 2 -C 4 The selectivity of olefins and alkanes in the distillation section is significantly improved, and the proportion of olefins can be increased to 75% in C2-C4. The conversion of carbon dioxide is also increased, while the selectivity to the by-produc...

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Abstract

The invention discloses a preparation method of a supported iron-based catalyst, and the method at least comprises the following steps: taking iron as an active component, taking a porous material as a carrier, and adopting a physical sputtering method to prepare the supported iron-based catalyst. Through rotation of the polygonal rotating barrel, uniform dispersion of iron particles is realized. The method can be used for solving the problems that the carbon dioxide hydrogenation catalyst is poor in active metal dispersion and easy to grow and sinter under a long-term high-temperature reaction condition, so that the reaction is inactivated.

Description

technical field [0001] The application relates to a preparation method and application of a supported iron-based catalyst, and belongs to the field of catalyst preparation. Background technique [0002] In nature, plants absorb carbon dioxide from the air and convert it into organic matter and oxygen through photosynthesis. The process is slow, so chemists have been trying to chemically recycle carbon dioxide. If carbon dioxide is used as a raw material to produce hydrocarbon compounds, especially long-chain hydrocarbon fuels, it will be a potential clean energy strategy to replace fossil fuels, which can not only effectively reduce the greenhouse effect caused by carbon dioxide, but also reduce the dependence on traditional fossil energy. . However, the activation and selective conversion of carbon dioxide still faces great challenges. Compared with the more active twin brother carbon monoxide, carbon dioxide molecules are very stable and difficult to activate. Compared w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J29/46B01J35/10B01J37/34C10G2/00
CPCB01J29/46B01J23/745B01J37/342B01J37/349C10G2/334C10G2/332B01J2229/186C10G2400/02B01J35/615
Inventor 孙剑葛庆杰位健
Owner 珠海市福沺能源科技有限公司
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