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Application of iron-based catalyst with porous film structure in Fischer-Tropsch reaction

A Fischer-Tropsch reaction and catalyst technology, applied in the field of preparation of iron-based catalysts, can solve the problem of no application of iron nanoparticles, and achieve the effects of preventing carbon deposition and sintering, and inhibiting deactivation.

Active Publication Date: 2016-08-03
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the application of iron nanoparticles modified by porous membranes containing carbon and nitrogen elements in Fischer-Tropsch synthesis

Method used

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  • Application of iron-based catalyst with porous film structure in Fischer-Tropsch reaction
  • Application of iron-based catalyst with porous film structure in Fischer-Tropsch reaction
  • Application of iron-based catalyst with porous film structure in Fischer-Tropsch reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Fe 2 o 3 Preparation of Nanospheres. In a 500mL three-necked bottle, add 3.240g FeCl 3 ·6H 2 O and 300mL deionized water, reflux at 100°C for 80h. After cooling to room temperature, centrifuge and wash with deionized water until no chloride ions exist in the filtrate. And continue to wash with absolute ethanol for 3 times, then vacuum dry at room temperature for 12h to obtain Fe 2 o 3 nanospheres.

[0024] 2) Coating the nano-microspheres in step (1) with polyacrylic acid. Take 0.5gFe 2 o 3 Nanospheres were dispersed in 100mL deionized water, and 0.022g KNO was added 3 1. 5g of polyacrylic acid, ultrasonic for 30min, stirred and impregnated at room temperature for 5h, then evaporated under negative pressure at 80°C to dryness, and dried at 120°C for 12h. Finally, under the protection of nitrogen, it was calcined at 450 °C for 4 h in a tube furnace to obtain carbon film-coated Fe 2 o 3 catalyst.

[0025] 3) Activity test. The activity of the prepared ca...

Embodiment 2

[0027] 1) Fe 2 o 3 Preparation of Nanospheres. In a 500mL three-necked bottle, add 3.240g FeCl 3 ·6H 2O and 300mL deionized water, reflux at 100°C for 40h. After cooling to room temperature, centrifuge and wash with deionized water until no chloride ions exist in the filtrate. And continue to wash with absolute ethanol for 3 times, then vacuum dry at room temperature for 12h to obtain Fe 2 o 3 nanospheres.

[0028] 2) Coating the nanospheres in step (1) with polyvinylpyrrolidone. Take 0.5gFe 2 o 3 Nanospheres were dispersed in 100mL deionized water, and 0.015g CH 3 COOK, 5g polyvinylpyrrolidone, sonication for 30min, stirring and impregnating at room temperature for 5h, then vacuum rotary evaporation at 80°C to dryness, and drying at 120°C for 12h. Finally, under the protection of nitrogen, it was roasted in a tube furnace at 250°C for 2 hours to obtain Fe coated with carbon and nitrogen. 2 o 3 catalyst.

[0029] 3) The activity test conditions are the same as in...

Embodiment 3

[0031] 1) Fe 2 o 3 Preparation of Nanospheres. In a 500mL three-necked bottle, add 2.592g FeCl 3 ·6H 2 O and 300mL deionized water, reflux at 90°C for 90h. After cooling to room temperature, centrifuge and wash with deionized water until no chloride ions exist in the filtrate. And continue to wash with absolute ethanol for 3 times, then vacuum dry at room temperature for 12h to obtain Fe 2 o 3 nanospheres.

[0032] 2) Coating the nanospheres in step (1) with polyethyleneimine. Take 0.5gFe 2 o 3 Nanospheres were dispersed in 100mL deionized water, and 0.018gK was added 2 CO 3 1. 5g of polyethyleneimine, ultrasonic for 30min, stirred and impregnated at room temperature for 5h, then evaporated under negative pressure at 80°C to dryness, and dried at 120°C for 12h. Finally, under the protection of nitrogen, it was roasted in a tube furnace at 200 °C for 1 h to obtain Fe coated with two elements of carbon and nitrogen. 2 o 3 catalyst.

[0033] 3) The activity test co...

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Abstract

The invention discloses an application of an iron-based catalyst with a porous film structure in Fischer-Tropsch reaction. According to the invention, the iron nano-particle with spherical or sphere-like feature and porous C and N films is taken as the catalyst and is added into auxiliaries; the catalyst is applied to the Fischer-Tropsch reaction of the synthesis gas; the catalyst has higher catalytic activity and low carbon olefin selectivity; the catalyst deactivation caused by the carbon deposition and sintering of the iron nano-particles in the reaction process can be effectively restrained; the service life of the catalyst is prolonged; the application has industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of synthesis gas conversion, and relates to the preparation of an iron-based catalyst with a porous membrane structure and its application in Fischer-Tropsch reaction. Background technique [0002] Low-carbon olefins refer to olefins with a carbon number less than or equal to 4, mainly including ethylene, propylene and butene, which are core products in the petrochemical field. They are not only important monomers for the synthesis of polymer materials, but also for the synthesis of ethylene oxide, Basic organic raw materials for compounds such as ethylbenzene, styrene, propylene oxide, cumene and acrylonitrile. Although my country's low-carbon olefin production capacity has been continuously increased in recent years, and the production has reached a considerable scale, the import volume has continued to grow for a long time. At present, the production of low-carbon olefins mainly comes from the cracking o...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J23/745B01J35/00C07C1/04C07C9/04C07C11/04C07C11/06C07C11/08C10G2/00
CPCC10G2/332C07C1/044B01J23/745B01J27/24C07C2523/745C07C2527/24C10G2300/70B01J35/23C07C9/04C07C11/04C07C11/06C07C11/08Y02P20/52
Inventor 刘小浩姜枫
Owner JIANGNAN UNIV
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