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Catalyst for plasma decomposition of carbon dioxide and preparation method thereof, catalytic system for plasma decomposition of carbon dioxide and application thereof

A carbon dioxide, catalytic system technology, applied in the field of ion decomposition, can solve the problems of discharge power influence, low energy efficiency, etc.

Active Publication Date: 2019-10-29
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the conversion rate of low-temperature plasma decomposition of carbon dioxide is affected by the discharge power. To obtain a higher conversion rate of carbon dioxide, the discharge power must be increased, which will inevitably lead to low energy efficiency and limit the application of plasma in the decomposition of carbon dioxide.

Method used

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  • Catalyst for plasma decomposition of carbon dioxide and preparation method thereof, catalytic system for plasma decomposition of carbon dioxide and application thereof
  • Catalyst for plasma decomposition of carbon dioxide and preparation method thereof, catalytic system for plasma decomposition of carbon dioxide and application thereof
  • Catalyst for plasma decomposition of carbon dioxide and preparation method thereof, catalytic system for plasma decomposition of carbon dioxide and application thereof

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preparation example Construction

[0031] The present invention also provides a method for preparing a catalyst for plasma decomposition of carbon dioxide described in the foregoing technical solution, comprising the following steps:

[0032] (1) impregnating the spherical carrier in a non-noble metal salt solution to obtain a catalyst precursor; the impregnation time is 0.5 to 2 hours;

[0033] The mass of non-precious metal ions in the non-precious metal salt solution is based on the mass of the corresponding oxide, and the mass of the non-precious metal oxide is 1-40% of the mass of the spherical carrier after drying;

[0034] (2) After the catalyst precursor obtained in the step (1) is dried, discharge treatment is carried out under an argon atmosphere to obtain a catalyst for plasma decomposition of carbon dioxide.

[0035] In the invention, the spherical carrier is impregnated in a non-noble metal salt solution to obtain a catalyst precursor. The spherical carrier is preferably obtained by drying the raw...

Embodiment 1

[0059] Take 15g of alumina pellets, the diameter of spherical alumina is about 2-3mm, and then pretreat in an oven at 110°C for 3 hours; obtain alumina pellets for use;

[0060] According to the mass of molybdenum oxide in the shaped catalyst being 10% of the mass of the carrier, a certain concentration of ammonium molybdate solution was prepared; the alumina pellets were immersed in the solution for 1 hour, and after drying overnight at 120°C, in an Ar atmosphere, controlled 50W Discharge input power, discharge treatment 1h, obtain catalyst, carry out XRD analysis to the prepared catalyst, the result is as follows figure 2 shown by figure 2 It can be seen that the obtained catalyst is 10% MoO 3 / Al 2 o 3 , namely MoO 3 It is 10% of the total mass of the catalyst, and the non-noble metal exists in the form of oxide on the surface of the spherical carrier.

[0061] according to figure 1 The way to provide wire barrel type dielectric barrier discharge plasma reactor, whe...

Embodiment 2

[0065] Prepare the catalyst according to the method of Example 1, the difference is that the impregnation solution used in the impregnation process is a cobalt nitrate solution, the concentration of the solution is prepared according to the mass of cobalt oxide in the shaped catalyst as 5% of the carrier mass, and the impregnation time is 1h to obtain the catalyst. The prepared catalyst carries out XRD analysis, it can be known that the obtained catalyst is 5% Co 2 o 3 / Al 2 o 3 .

[0066]A plasma reactor was provided and used for the decomposition of carbon dioxide in the same manner as in Example 1, with the difference that the effective discharge power was 7.0W.

[0067] Analysis of the effluent gas by gas chromatography can confirm that the carbon dioxide is decomposed into carbon monoxide and oxygen after flowing through the plasma reactor.

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Abstract

The invention provides a catalyst for carbon dioxide plasma decomposition and a preparation method thereof. The catalyst is prepared from a spherical carrier and a non-noble metal oxide loaded on thespherical carrier, wherein the spherical carrier contains one or more of aluminum oxide, titanium oxide, 13X molecular sieve and silicon oxide; the mass of the non-noble metal oxide is 1 to 40 percentof the mass of the spherical carrier. The invention further provides a catalytic system of carbon dioxide plasma decomposition and application thereof. The system is filled with the catalyst providedby the invention, and the catalyst adapts to plasma, thereby effectively reducing the activation energy barrier of the plasma, and increasing the energy efficiency in a carbon dioxide plasma decomposition process. The result of the embodiment shows that the conversion rate of carbon dioxide is up to 25 percent and the energy efficiency is up to 25 percent when the catalyst provided by the invention is applied to a carbon dioxide plasma decomposition system.

Description

technical field [0001] The invention belongs to the technical field of plasma decomposition of carbon dioxide, and in particular relates to a catalyst for plasma decomposition of carbon dioxide and a preparation method thereof, a catalytic system for plasma decomposition of carbon dioxide and an application thereof. Background technique [0002] With the continuous development of industry, the consumption of fossil energy is increasing day by day, and the emission of carbon dioxide is increasing rapidly. As we all know, as a greenhouse gas, the increase of carbon dioxide emissions will lead to global warming and cause a series of ecological problems. Carbon dioxide is not only a greenhouse gas, but also a valuable carbon resource. It is called "the new carbon source of the 21st century": it is estimated that the carbon content of carbon dioxide on the earth is equal to that of fossil fuels such as coal, oil, and natural gas. Ten times the carbon content. Whether from the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/28B01J23/75B01J23/882B01J23/745B01J23/72B01J23/755B01J29/16B01D53/86B01D53/62
CPCB01D53/62B01D53/86B01D2257/504B01D2259/818B01J23/002B01J23/28B01J23/72B01J23/745B01J23/75B01J23/755B01J23/882B01J29/163B01J2229/18B01J2523/00B01J2523/68B01J2523/845B01J2523/31B01J2523/47B01J2523/41Y02A50/20
Inventor 陈秉辉曹佃宇郑进保李小飞张诺伟叶松寿
Owner XIAMEN UNIV
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