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Preparation method for carbide catalyst for organic carbon vapor phase growth and application thereof

A vapor phase growth, catalyst technology, applied in metal/metal oxide/metal hydroxide catalysts, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve uneven distribution, uncontrollable catalyst particle shape, etc. problem, to avoid uneven distribution, efficient preparation, simple and environmentally friendly process

Inactive Publication Date: 2017-10-17
陈永
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned patents have successfully prepared catalysts of carbon nanotubes and graphene, but the catalyst preparation process has adopted conventional processes of washing, filtering, evaporating, grinding, and pulverizing. And slow solvent evaporation is easy to form aggregated state and cause uneven distribution, as well as a large amount of waste liquid, dust and other wastes that pollute the environment

Method used

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  • Preparation method for carbide catalyst for organic carbon vapor phase growth and application thereof
  • Preparation method for carbide catalyst for organic carbon vapor phase growth and application thereof
  • Preparation method for carbide catalyst for organic carbon vapor phase growth and application thereof

Examples

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Embodiment 1

[0025] Embodiment 1, a preparation method of a catalyst used for vapor phase growth of organic carbon into carbides, the method comprising: adding 30% sodium hydroxide and 5% dodecylbenzenesulfonate to 30% ferric nitrate containing catalytic elements The mixed solution of the iron-containing catalyst precursor is prepared by the co-precipitation method and the high-pressure hydrothermal method. The percentages of the above substances are all mass percentage concentrations. The cyclone separator and bag filter of the spray dryer collect the catalyst precursor. The particle size of the catalyst precursor is 60-150 microns, and then it is calcined at 450°C for 3 hours in a rotary kiln to obtain a particle size of 50-120 microns and a specific surface area of ​​90m 2 / g of catalyst particles, the main composition of the catalyst is iron oxide (95%).

[0026] When the catalyst is applied, the catalyst is placed in a fixed bed, the temperature is controlled at 600-800° C., and a mix...

Embodiment 2

[0027] Embodiment 2, a kind of preparation method of the catalyst that is used for organic carbon gas phase growth to carbide, this method comprises: add 15% ammonium carbonate, 5% sodium phosphate to press co-precipitation method in 10% cobalt chloride containing catalytic element 1. The mixed solution containing the cobalt catalyst precursor is prepared by the high-pressure hydrothermal method. The percentages of the above substances are all mass percentage concentrations. The mixed solution is added to the centrifugal spray dryer and sprayed and dried at a temperature of 280 ° C. The cyclone separation of the centrifugal spray dryer The catalyst precursor is collected by the filter and bag dust collector. The particle size of the catalyst precursor is 80-200 microns, and then it is calcined at 400°C for 2 hours in a rotary kiln to obtain a particle size of 60-150 microns and a specific surface area of ​​60m 2 / g of catalyst particles, the main composition of the catalyst is ...

Embodiment 3

[0029] Embodiment 3, a kind of preparation method of the catalyst that is used for organic carbon gas phase growth to carbide, this method comprises: Add 30% ammonium carbonate, 5% metaphosphoric acid to 20% nickel nitrate, 10% cobalt nitrate containing catalytic element Sodium, according to the co-precipitation method and high-pressure hydrothermal method, the mixed solution containing iron and cobalt catalyst precursors is prepared. The percentages of the above substances are all mass percentage concentrations. The mixed solution is added to the two-fluid spray dryer and sprayed at a temperature of 220 ° C. Drying, the cyclone separator and bag filter of the two-fluid spray dryer collect the catalyst precursor, the particle size of the catalyst precursor is 70-40 microns, and then calcined at 400 °C for 2 hours in a rotary furnace to obtain a particle size of 50-110 microns , specific surface area 100m 2 / g catalyst particles, the main composition of the catalyst is iron and ...

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Abstract

The invention discloses a preparation method for a carbide catalyst for organic carbon vapor phase growth and an application thereof. The method comprises the following steps: adding a precipitator or a complexing agent or a dispersing agent, or a precipitator and a dispersing agent, or a complexing agent and a dispersing agent into a compound or complex containing a catalytic element, wherein the compound or complex containing the catalytic element is the compound containing one or more of rare earth elements, iron, cobalt, nickel, molybdenum, zirconium, copper, zinc, magnesium, aluminium and silicon or the complex thereof; through one or more of a precipitation method, a complexing method, a hydrothermal method, a high-pressure hydrothermal method and a sol-gel method, synthesizing to prepare mixed solution containing the catalytic elements, spray-drying the mixed solution by a spray drying machine, rapidly removing a solvent to form a catalyst precursor with catalytic element nano-state distribution, and calcinating the catalyst precursor in the high temperature, to obtain the carbide catalyst for the organic carbon vapor phase growth.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a catalyst used for vapor phase growth of organic carbon into carbides, and an application thereof. Background technique [0002] Carbon nanotubes, graphene or their composites are important materials formed by carbon elements. The basic structural unit is a six-membered carbon ring formed by sp2 hybridization of carbon atoms. It has excellent mechanical, electrical and chemical properties and is widely used. . [0003] At present, one of the main methods for preparing the above materials is through the catalytic cracking of carbon-containing organic gases and the deposition and growth of carbon elements. This method has high yield and controllable preparation conditions, and is favored by people. Catalyst is the most important factor in the chemical vapor deposition method of catalytic cracking of carbon-containing organic gases, which has been exten...

Claims

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Application Information

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IPC IPC(8): B01J21/04B01J21/10B01J23/00B01J23/745B01J23/75B01J23/755B01J23/78B01J23/83B01J35/10C01B32/162C01B32/186
CPCB01J21/04B01J21/10B01J23/002B01J23/745B01J23/75B01J23/755B01J23/78B01J23/83B01J2523/00B01J35/613B01J2523/3706B01J2523/842B01J2523/847
Inventor 陈永刘云龙刘高侠陈冠华
Owner 陈永
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