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Catalyst for preparing low carbon olefin from synthetic gas and application thereof in Fischer-Tropsch reaction

A technology of low-carbon olefins and catalysts, which is applied in the field of preparation of Fischer-Tropsch synthesis catalysts, can solve the problems of ineffective suppression of methane, and achieve the effects of easy operation, single component and simple preparation method

Active Publication Date: 2014-09-24
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Iron on silica and alumina supports tends to interact strongly with silicon or aluminum, so that the obtained catalysts cannot effectively inhibit the formation of methane in the reaction of syngas to light olefins
However, there are no literature and patent reports for the application of single-component inert ammonium ferrocyanide on relatively inert activated carbon, carbon black, silicon carbide and other carriers for the production of low-carbon olefins from syngas

Method used

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  • Catalyst for preparing low carbon olefin from synthetic gas and application thereof in Fischer-Tropsch reaction
  • Catalyst for preparing low carbon olefin from synthetic gas and application thereof in Fischer-Tropsch reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 0.978g of activated carbon baked at 110°C for 12h, add 1.62g of 7wt% iron (NH 4 ) 4 Fe(CN) 6 The aqueous solution was added to the activated carbon, stirred evenly, and vacuum-dried at room temperature for 24 hours, the catalyst was pressed and sieved at 6 MPa, and a sample of 40-60 mesh was taken to obtain an AC1 catalyst with an iron loading of 11.6%.

Embodiment 2

[0027] Treat 5g of carbon black in 50ml of 15% hydrogen peroxide at 100°C for 7 hours, wash and filter with suction, and dry in an oven at 110°C. Get the carbon black of 0.315g above-mentioned drying, with 0.375ml iron content be 7wt% (NH 4 ) 4 Fe(CN) 6 The aqueous solution was diluted and impregnated into the carbon black twice with equal volume, and after stirring uniformly each time, it was vacuum-dried at room temperature for 4 hours. The obtained catalyst was pressed and sieved at 6 MPa, and a sample of 40-60 mesh was taken to obtain a BC1 catalyst with an iron loading of 9.6%. After the catalyst was reduced by hydrogen, the XRD of the sample was as follows: figure 1 shown.

Embodiment 3

[0029] Get 0.304g with the carbon black of above-mentioned treatment, with 0.525ml iron content be 7wt% (NH 4 ) 4 Fe(CN) 6 The aqueous solution was diluted with water and then added to the carbon black in two equal volumes, stirred uniformly each time, and then vacuum-dried at room temperature for 4 hours. The obtained catalyst was pressed and sieved at 6MPa, and a 40-60 mesh sample was taken to obtain a BC2 catalyst with an iron loading of 13.9%.

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Abstract

The invention discloses a preparation method of a catalyst for highly-selectively preparing low carbon olefin from synthetic gas. The method of the invention adopts an inert iron source precursor and an inert catalyst carrier, directly loads the carrier with the inert iron source, and thus obtains a catalyst with weak interaction between metal and the carrier. The catalyst is applicable to Fischer-Tropsch synthesis reaction, realizes highly-selective conversion of synthetic gas into low carbon olefin, can well inhibit the generation of methane, is simple in preparation method, and has very good application prospects.

Description

technical field [0001] The invention relates to the preparation of a Fischer-Tropsch synthesis catalyst, specifically, a relatively inert iron source is used as a precursor to load on an inert carrier to prepare a Fischer-Tropsch catalyst for generating low-carbon olefins with high selectivity. Background technique [0002] Fischer-Tropsch (Fischer-Tropsch) synthesis is an important way to obtain hydrocarbons from coal, natural gas and biomass. How to obtain low-carbon olefins from the obtained hydrocarbons with high selectivity is a very important research direction in recent years. Directly obtaining light olefins from syngas can not only alleviate the shortage of raw materials for low-carbon olefins production caused by oil depletion, but also has a simpler process than the currently emerging MTO process, which does not require the step of synthesizing methanol. Therefore, it has great practical significance. However, the products of Fischer-Tropsch synthesis follow the ...

Claims

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Application Information

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IPC IPC(8): B01J23/745C10G2/00
Inventor 包信和赵侦超潘秀莲
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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