High-activity iron-based low-temperature Fischer-Tropsch synthesis catalyst and preparation method thereof

A Fischer-Tropsch synthesis, iron catalyst technology, applied in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, catalysts for physical/chemical processes, etc. , the preparation method is simple, the effect of high stability

Inactive Publication Date: 2015-03-11
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, ruthenium nanoparticles have high activity, but noble metals are expensive and have no practical possibility
Currently there is no ε -Fe 2 A Report on Low-temperature Liquid-Phase Fischer-Tropsch Synthesis Catalysts of C Phase

Method used

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  • High-activity iron-based low-temperature Fischer-Tropsch synthesis catalyst and preparation method thereof
  • High-activity iron-based low-temperature Fischer-Tropsch synthesis catalyst and preparation method thereof
  • High-activity iron-based low-temperature Fischer-Tropsch synthesis catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Add iron powder and aluminum powder into the arc induction furnace with a weight ratio of 50:50, and then pass in argon gas after vacuuming, use electric current to stimulate arc heating, and evenly melt under the action of magnetic stirring, and then cool naturally or quickly Cool to room temperature, grind the iron-aluminum alloy to 100-200 mesh;

[0021] (2) Under the protection of argon, add 3 mL of 30% mass fraction potassium hydroxide solution into the stirring container, and wait until the temperature rises to 70 o At C, add 0.5 g of iron-aluminum alloy powder to the lye, and keep it for 1 h after the addition is complete. Then wash with deionized water to neutrality, then replace water with absolute ethanol, finally replace absolute ethanol with polyethylene glycol 200, and store the skeleton iron catalyst precursor therein;

[0022] (3) The framework iron catalyst precursor was dispersed in 20 mL polyethylene glycol 200, and then the catalyst and solvent w...

Embodiment 2

[0024] (1) Same as embodiment 1;

[0025] (2) Same as embodiment 1;

[0026] (3) The framework iron catalyst precursor was dispersed in 20 mL polyethylene glycol 200, and then the catalyst and solvent were transferred to a 50 mL autoclave. H at room temperature 2 The / CO = 2 synthetic gas is replaced and inflated to 3.0 MPa. The temperature of the Fischer-Tropsch synthesis reaction was set at 170 o C, the stirring speed is set to 800 rpm. Under the low-temperature Fischer-Tropsch synthesis reaction conditions, the precursor of the framework iron catalyst was simultaneously carbonized in situ. When the reaction pressure dropped to 3.0 MPa, the reaction was stopped and the autoclave was cooled to room temperature. The catalyst is named as B, and its performance evaluation time is 20 minutes, and the reaction results are shown in Table 1. The X-ray diffraction spectrum of gained catalyst in this example sees figure 1 ,show ε -Fe 2 C is the iron-containing active phase ...

Embodiment 3

[0028] (1) Same as embodiment 1;

[0029] (2) Same as embodiment 1;

[0030] (3) The framework iron catalyst precursor was dispersed in 20 mL polyethylene glycol 200, and then the catalyst and solvent were transferred to a 50 mL autoclave. H at room temperature 2 The / CO = 2 synthetic gas is replaced and inflated to 3.0 MPa. The temperature of the Fischer-Tropsch synthesis reaction was set at 200 oC, the stirring speed is set to 800 rpm. Under the low-temperature Fischer-Tropsch synthesis reaction conditions, the precursor of the framework iron catalyst was simultaneously carbonized in situ. When the reaction pressure dropped to 3.0 MPa, the reaction was stopped and the autoclave was cooled to room temperature. The catalyst is named as C, and its performance evaluation time is 15 minutes, and the reaction results are shown in Table 1. The X-ray diffraction spectrum of gained catalyst in this example sees figure 1 ,show ε -Fe 2 C is the iron-containing active phase i...

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Abstract

The invention belongs to the field of chemical catalysts, and specifically relates to a high-activity iron-based low-temperature Fischer-Tropsch synthesis catalyst and a preparation method thereof. The low-temperature Fischer-Tropsch synthesis iron-based catalyst is prepared by subjecting a skeleton iron material to low-temperature carbonization at a low temperature under a high carbon monoxide partial pressure and contains high-activity epsilon-Fe2C nano particles. The provided Fischer-Tropsch synthesis catalyst has an extremely high catalytic activity at a low temperature (less than 200 DEG C), wherein the catalytic activity is prominently higher than that of reported low-temperature iron-based Fischer-Tropsch synthesis catalysts. At the same time, the stability of the provided catalyst is high, and thus the catalyst can meet the production requirements.

Description

technical field [0001] The invention belongs to the technical field of chemical catalysts, and in particular relates to a highly active iron-based low-temperature Fischer-Tropsch synthesis catalyst and a preparation method thereof. Background technique [0002] Fischer-Tropsch synthesis is a method of converting carbon monoxide and hydrogen produced from coal, natural gas, and biomass into liquid hydrocarbons by catalysis. The synthesized liquid fuels are basically composed of straight-chain hydrocarbons and olefins, and have sulfur-free and nitrogen-free properties. , no metal, no aromatics and other advantages, it is a clean and environmentally friendly fuel oil and chemicals, so it is an important way to effectively solve the increasingly serious oil shortage and environmental pollution problems. One of the key factors in Fischer-Tropsch synthesis is to develop catalysts with high stability, good activity, low price and wide sources. For this reason, many petroleum compa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22C10G2/00C07C1/04C07C9/04
Inventor 乔明华许可
Owner FUDAN UNIV
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