Copper-iron core-shell catalyst for lower alcohol synthesis as well as preparation method and application thereof

A core-shell catalyst and catalyst technology, applied in the preparation of organic compounds, chemical instruments and methods, preparation of hydroxyl compounds, etc., can solve problems such as the influence of bimetallic core-shell structure that have not been reported, achieve novel structure, prevent Fe sintering, highly selective effect

Active Publication Date: 2013-07-10
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the modified Fischer-Tropsch catalyst in the synthesis of alcohol catalysts has not reported the influence of the bimetallic core-shell structure on the alcohol product.

Method used

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  • Copper-iron core-shell catalyst for lower alcohol synthesis as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 2.42gCu(NO 3 ) 2 ·3H 2 O, 32.32gFe(NO 3 ) 3 ·9H 2 O, 60g urea is dissolved in 1000ml deionized water, the mixed solution is refluxed at 90℃ while mechanically stirring (stirring speed 500rpm), and the pH of the system is continuously monitored until the pH of the solution is 7, and the reflux temperature and stirring speed are unchanged, continue stirring Reflux for 30 minutes, centrifuge, dry at 80°C for 9 hours, and calcinate at 450°C for 2 hours to prepare a catalyst, which is designated as CF-1. The catalyst element molar ratio composition is Cu:Fe 1:8.

[0022] The catalyst is prepared in a pressurized fixed-bed reactor, at 200 ℃ of synthesis gas (molar ratio H 2 / CO=2) Medium reduction, reducing gas volumetric space velocity 3000h -1 , The reduction pressure is 0.1MPa, and the reduction time is 15h. After cooling, the synthesis gas is switched to react. The reactants are collected by a heat trap and a cold trap respectively. The reaction conditions are: raw gas mol...

Embodiment 2

[0024] 2.42gCu(NO 3 ) 2 ·3H 2 O, 16.16gFe(NO 3 ) 3 ·9H 2 O, 60g urea is dissolved in 1000ml deionized water, the mixed solution is refluxed at 90°C while mechanically stirring (stirring speed 500rpm), and the pH of the system is continuously monitored until the pH of the solution is 7, and the reflux temperature and stirring speed are unchanged, continue stirring Reflux for 30 minutes, centrifuge, dry at 80°C for 9 hours, and calcinate at 450°C for 2 hours to prepare a catalyst, which is designated as CF-2. The catalyst element molar ratio composition is Cu:Fe 1:4.

[0025] The catalyst is prepared in a pressurized fixed-bed reactor at 200 ℃ of synthesis gas (molar ratio H 2 / CO=2) Medium reduction, reducing gas volumetric space velocity 3500h -1 , The reduction pressure is 0.1MPa, and the reduction time is 15h. After cooling, the synthesis gas is switched to react. The reactants are collected by heat trap and cold trap respectively. The reaction conditions are: raw gas molar r...

Embodiment 3

[0027] 2.42gCu(NO 3 ) 2 ·3H 2 O, 4.04gFe(NO 3 ) 3 ·9H 2 O, 60g urea is dissolved in 1000ml deionized water, the mixed solution is refluxed at 90°C while mechanically stirring (stirring speed 500rpm), and the pH of the system is continuously monitored until the pH of the solution is 7, and the reflux temperature and stirring speed are unchanged, continue stirring Reflux for 30 minutes, centrifuge, dry at 80°C for 9 hours, and calcinate at 450°C for 2 hours to prepare a catalyst, which is designated as CF-3. The catalyst element molar ratio composition is Cu:Fe 1:1.

[0028] The catalyst is prepared in a pressurized fixed-bed reactor at 200 ℃ of synthesis gas (molar ratio H 2 / CO=2) Medium reduction, reducing gas volumetric space velocity 4000h -1 , The reduction pressure is 0.1MPa, and the reduction time is 15h. After cooling, the synthesis gas is switched to react. The reactants are collected by heat trap and cold trap respectively. The reaction conditions are: raw gas molar ra...

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Abstract

The invention relates to a copper-iron core-shell catalyst for lower alcohol synthesis, comprising Fe2O3 and CuO. The catalyst is of a core-shell structure, the core of the catalyst is Fe2O3, and the shell of the catalyst is CuO; and the element mol ratio Cu:Fe of the catalyst is 1:8-8:1. The catalyst has the advantages of iron sintering prevention, high alcohol selectivity and good stability.

Description

Technical field [0001] The invention relates to a catalyst for synthesizing low-carbon alcohol and its preparation method and application, in particular to a synthesis method and application of a core-shell type synthesis of low-carbon alcohol CuFe catalyst. Background technique [0002] With the continuous development of the energy and chemical industries, oil is constantly being consumed, and the single oil-dependent energy structure has attracted the attention and vigilance of all countries. The transformation of the single energy structure, the search for new alternative energy sources and chemical raw materials have become the focus of research. And direction. In this context, coal with reserves far greater than oil has become the best choice. However, due to the physical properties of coal and its combustion and processing characteristics, its development is greatly restricted. Therefore, after certain steps, the coal is liquefied and re-liquid. The technology used has bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C07C29/156
Inventor 孙予罕韩信有房克功林明桂王俊刚郭荷芹
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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