Nanometer iron-series catalyst and preparation method and device thereof

A nano-iron and catalyst technology, which is applied in nanostructure manufacturing, chemical instruments and methods, physical/chemical process catalysts, etc. The preparation process is simple, the stability is good, and the effect of easy industrial production

Inactive Publication Date: 2008-01-09
JIANGSU TIANYI ULTRA FINE METAL POWDER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The recent research results of my country's 863 program show that the synthesis of nano-scale particles using divalent iron salt as the basic raw material can play a very good catalytic effect, but the precursor of the nano-catalyst generated during the preparation process is a metastable solid, such as If it is not dispersed in time, secondary agglomeration will occur; when the precursor is oxidized to form a catalyst product, the particle growth will also occur, reducing the specific surface area and activity of the iron-based catalyst

Method used

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  • Nanometer iron-series catalyst and preparation method and device thereof

Examples

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preparation example Construction

[0024] The device used for preparing the nano-iron series catalyst of the present invention is made up of reaction chamber 1 and settling chamber 2, and reaction chamber 1 is provided with pentacarbonyl iron liquid or vapor inlet 3, iron particle outlet 5 and protective gas inlet 4, and settling chamber is provided with There are iron particle inlet 6, gas outlet 7, liquid isolation medium inlet 8 and material outlet 10, wherein the nano-iron particle inlet 6 extends into the liquid isolation medium of the settling chamber, the gas outlet 7 is connected with the vacuum pump 11, and the reaction chamber iron particle outlet 5 It is connected with the iron particle inlet 6 of the settling chamber through a high-pressure valve 9 .

[0025] The preparation method of nano-iron series catalyst of the present invention is made up of the following steps:

[0026] ① Inject a liquid medium into the settling chamber 2, vacuumize or replace the air in the reaction chamber 1 and the settli...

Embodiment 1

[0036] Inject heavy oil into the 2L settling chamber 1 until the volume occupies 1L of the settling chamber, open the protective gas inlet 4 and the high-pressure valve 9, and replace the air in the high-pressure reaction chamber 1 and the settling chamber 2 with a volume of 2L with high-purity nitrogen gas. After the replacement is completed, Close the valve 9, and continue to feed high-purity nitrogen into the reaction chamber 1 to 0.1MPa; start the heating device to raise the temperature to 285°C, open the iron pentacarbonyl inlet 3, and feed 0.4L iron pentacarbonyl steam, and the iron pentacarbonyl enters the reaction chamber to decompose. Prepare nano-iron particles; open high-pressure valve 9 and settling chamber air outlet 7, start vacuum pump simultaneously, nano-iron particles enter settling chamber 2 through iron particle outlet 5 and iron particle inlet 6 and disperse in heavy oil; open discharge port 10 to The heavy oil dispersed with nano-iron particles is stored i...

Embodiment 2

[0039]The same preparation method and device as in Example 1 were used to produce iron-based catalysts, wherein the liquid isolation medium was phenol, the temperature of the reaction chamber was raised to 400°C, the pressure of high-purity nitrogen was 2.5Mpa, and 5L of iron pentacarbonyl steam was introduced. The coal type was changed to Shenhua Dongsheng lignite for coal liquefaction experiment, the coal conversion rate was 89.5%, and the oil recovery rate was 57%.

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Abstract

The present invention discloses one kind of nanometer iron catalyst and its preparation process and apparatus. The nanometer iron catalyst comprising iron particles smaller than 100 nm suspended in isolating liquid medium is prepared through the following steps: heating high purity nitrogen or inert gas to temperature higher than the critical temperature of iron pentacarbonyl inside the reactor, and introducing iron pentacarbonyl liquid or vapor to decompose iron pentacarbonyl to obtain iron particle; and pumping the iron particle from the reactor to the isolating liquid medium in a settling chamber. The present invention utilizes liquid medium to block the aggregation of iron particle for obtain nanometer iron particle. The nanometer iron catalyst has simple preparation process and high catalytic activity, and is suitable for industrial production.

Description

technical field [0001] The invention relates to an iron-based catalyst and its preparation method and device, in particular to a uniformly dispersed and highly active nanometer iron-based catalyst obtained by thermally decomposing pentacarbonyl iron vapor, and its preparation method and device. Background technique [0002] The transition group element iron has a special d electron orbital, and the H 2 , N 2 , NH 3 、C 2 h 2 、C 2 h 4 It can produce chemical adsorption, generate intermediate species on the surface, activate and dissociate the adsorbed molecules into atoms, and provide reactants for various chemical reactions, so it is an excellent chemical catalyst. Iron-based catalysts have been widely used in the fields of coal chemical industry, petroleum refining, ammonia synthesis and decomposition catalysis. [0003] At present, the commonly used iron-based catalysts mainly include natural pyrite, pyrite and various smelting waste residues. Its particles are gene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B82B1/00B82B3/00
Inventor 高为鑫柯尊斌张蓉艳
Owner JIANGSU TIANYI ULTRA FINE METAL POWDER
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