Preparation method of rare-earth oxide material containing tourmaline

A technology of rare earth oxides and tourmaline, applied in chemical instruments and methods, catalyst activation/preparation, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of low specific surface area of ​​synthetic catalysts and achieve catalytic activity Improve and reduce methane ignition temperature and improve catalytic activity

Inactive Publication Date: 2014-03-12
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Patent KR20100054125 (2010) prepared a series of mixed-component perovskite catalysts by hydrothermal synthesis method, but the specific surface area of ​​the synthesized catalysts by this method is low

Method used

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  • Preparation method of rare-earth oxide material containing tourmaline
  • Preparation method of rare-earth oxide material containing tourmaline
  • Preparation method of rare-earth oxide material containing tourmaline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) The perovskite rare earth oxide material LaCoO 3 Add 20g into the reaction kettle, add 8mL of deionized water, and seal it;

[0028] (2) The hydrothermal reaction is divided into two stages. In the first stage, the preheating temperature is controlled at 120°C and the action time is 1h. This stage aims to stimulate the spontaneous electrode action of tourmaline so that it can produce a relatively stable micro Electric field; the second stage is the recrystallization process of rare earth oxide materials under the action of tourmaline electric field and hydrothermal reaction, the temperature is controlled at 240°C, and the action time is 4h;

[0029](4) After the hydrothermal reaction is completed, the reactor is taken out and rapidly cooled to 0°C, so that the rare earth oxide particles are quenched and crystallized to further control the particle size of the material;

[0030] (5) Take out the sample and dry it at 80°C, put it in a muffle furnace at 300°C for 30 ...

Embodiment 2

[0033] (1) In order to make tourmaline generate a uniform electric field during the hydrothermal process, 0.4 g of tourmaline powder (with a particle size range of 2.0-3.0 μm) was mixed with the perovskite-type rare earth oxide material LaCoO 3 20g is added into the micro ball mill for mixing, and the rotating speed is 1000rpm;

[0034] (2) Add the uniformly mixed powder into the reaction kettle, add 80mL of deionized water, and seal it;

[0035] (3) The hydrothermal reaction is divided into two stages. In the first stage, the preheating temperature is controlled at 120°C and the action time is 1h. This stage aims to stimulate the spontaneous electrode action of tourmaline so that it can produce a relatively stable micro Electric field; the second stage is the perovskite rare earth oxide material LaCoO 3 In the recrystallization process under the action of tourmaline electric field and hydrothermal reaction, the temperature is controlled at 240°C, and the action time is 4h; ...

Embodiment 3

[0041] (1) In order to make tourmaline generate a uniform electric field during the hydrothermal process, 0.1 g of tourmaline powder was mixed with perovskite rare earth oxide material LaMnO 3 20g is added to the micro ball mill for mixing, and the rotating speed is 1200rpm;

[0042] (2) Add the uniformly mixed powder into the reaction kettle, add 40mL of deionized water, and seal it;

[0043] (3) The hydrothermal reaction is divided into two stages. In the first stage, the preheating temperature is controlled at 80°C, and the action time is 1h. This stage aims to stimulate the spontaneous electrode action of tourmaline, so that it can produce a relatively stable microstructure in the reactor. Electric field; the second stage is the perovskite rare earth oxide material LaMnO 3 The recrystallization process under the action of tourmaline electric field and hydrothermal reaction, the temperature is controlled at 150°C, and the action time is 3h;

[0044] (4) After the hydroth...

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Abstract

The invention provides a preparation method of a rare-earth oxide material containing tourmaline. According to the method, tourmaline micro powder is added during a hydrothermal preparation process, and a micro electric field generated by spontaneous polarization of the tourmaline micro powder is utilized to control the increase of particle sizes of rare-earth oxide particles in hydrothermal reaction, so that more reaction active sites are exposed while the specific surface area of the rare-earth oxide material is increased, the catalytic oxidation reactivity of high perovskite type rare-earth oxides is promoted, and defects in the preparation process and application of the conventional perovskite type rare-earth oxides are overcome. The method can be widely used for pretreatment of catalytic materials, brings favorable economic benefits and social benefits to China in the fields of catalytic oxidation, industrial organic waste gas treatment, automobile emission purification and the like, and is of important positive significance in energy conservation, emission reduction and reasonable use of energy sources.

Description

technical field [0001] The invention belongs to a new preparation method in the field of environmental protection materials, which can be used for the purification treatment of natural gas vehicle tail gas and coal mining waste gas. It uses the micro-electric field generated by the spontaneous polarization of tourmaline, and combines the hydrothermal action to recrystallize the rare earth oxide methane catalyst. , can effectively reduce the particle agglomeration problem of the catalytic material, and promote the exposure of more reactive sites on the surface of the methane catalytic material, thereby reducing the light-off temperature of methane and improving the catalytic activity of the catalyst. Background technique [0002] Methane is one of the main components of natural gas, biogas, pit gas and coal gas, and its greenhouse effect is 25 times greater than that of carbon dioxide. In addition, the combustion reaction of methane will also produce a large amount of NO x ,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/34B01J35/10B01J37/34
Inventor 薛刚梁金生王赛飞苑砚坤赵颖陈丹
Owner HEBEI UNIV OF TECH
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