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Monolithic perovskite catalyst, and preparation method and application thereof

A catalyst and perovskite technology, applied in the field of monolithic perovskite catalysts and preparation, can solve the problems of low catalytic activity, inability to remove toxic and harmful gases and particulate matter at the same time, and achieve high catalytic activity, improved specific surface area and thermal stability. performance, low cost of preparation

Pending Publication Date: 2020-05-15
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there are still some problems in the current catalysts for controlling the exhaust of underground fuel vehicles, such as low catalytic activity, and the inability to remove toxic and harmful gases and particulate matter at the same time. Aiming at the above problems, the present invention provides a monolithic perovskite catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A monolithic perovskite catalyst that efficiently reduces pollutant emissions from fuel vehicles, the structure of the catalyst is ABO 3 , the simple expression of its catalyst is Pr 0.9 Ca 0.1 FeO 3 , at this time X takes 0.1.

[0028] Preparation of this catalyst mainly includes the following steps:

[0029] (1) Pretreatment of the carrier. First, impregnate the cordierite honeycomb ceramic carrier in an oxalic acid solution with a mass fraction of 10% for about 30 minutes, seal it, and dry it in an electric blast drying oven at 70°C for 3 hours, then take out the carrier and wash it with clean water to achieve neutrality. Dry it naturally, and finally place it in a muffle furnace for calcination at 400°C for 1h.

[0030] (2) Preparation of catalyst precursor solution. Weigh Pr(NO 3 ) 3 ·6H 2 O 0.783g, Ca(NO 3 ) 2 4H 2 O0.0472g and Fe(NO 3 ) 3 9H 2 O 0.808g was dissolved in a certain amount of deionized water, so that the volume of the solution was 100m...

Embodiment 2

[0034] A monolithic perovskite catalyst that efficiently reduces pollutant emissions from fuel vehicles, the structure of the catalyst is ABO 3 , the simple expression of its catalyst is Pr 0.8 Ca 0.2 MnO 3 , at this time X takes 0.2.

[0035] Preparation of this catalyst mainly includes the following steps:

[0036] (1) Pretreatment of the carrier. First, impregnate the cordierite honeycomb ceramic carrier in an oxalic acid solution with a mass fraction of 14% for about 40 minutes, seal it and dry it in an electric blast drying oven at 75°C for 3.5 hours, then take out the carrier and wash it with clean water to achieve neutrality. Dry it indoors naturally, and finally place it in a muffle furnace for calcination at 450°C for 1.5h.

[0037] (2) Preparation of catalyst precursor solution. Weigh Pr(NO 3 ) 3 ·6H 2 O 0.696g, Ca(NO 3 ) 2 4H 2 O0.0944g and Mn(CH 3 COO) 2 4H 2 O 4.9g was dissolved in a certain amount of deionized water, so that the volume of the solut...

Embodiment 3

[0041] A monolithic perovskite catalyst that efficiently reduces pollutant emissions from fuel vehicles, the structure of the catalyst is ABO 3 , the simple expression of its catalyst is Pr 0.7 Ca 0.3 co 0.5 mn 0.5 o3 , at this time X takes 0.3.

[0042] Preparation of this catalyst mainly includes the following steps:

[0043] (1) Pretreatment of the carrier. First, impregnate the cordierite honeycomb ceramic carrier in an oxalic acid solution with a mass fraction of 17% for about 50 minutes, seal it, and dry it in an electric blast drying oven at 85°C for 4 hours, then take out the carrier and wash it with clean water to achieve neutrality. Dry it naturally, and finally place it in a muffle furnace for calcination at 450°C for 1.5h.

[0044] (2) Preparation of catalyst precursor solution. Weigh Pr(NO 3 ) 3 ·6H 2 O 0.609g, Ca(NO 3 ) 2 4H 2 O0.1416g, Mn(CH 3 COO) 2 4H 2 O 0.245g and Co(NO 3 ) 2 4H 2 O 0.291g was dissolved in a certain amount of deionized wat...

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Abstract

The invention discloses a monolithic perovskite catalyst, and a preparation method and an application thereof, and belongs to the technical field of preparation of catalysts. The structure of the catalyst is ABO3, the A position is Pr1-xCax, x is 0.1, 0.2 or 0.3, and the B position is one or two of Co, Mn, Fe and Cu. The preparation method comprises the following steps: firstly, selecting cordierite honeycomb ceramic as a carrier, and pretreating the cordierite honeycomb ceramic; weighing related raw materials according to a certain stoichiometric ratio, dissolving in a certain amount of deionized water, stirring, heating in a water bath for dissolving, adding a certain amount of citric acid, and stirring for dissolving to obtain a catalyst precursor solution; and finally, dipping the pretreated carrier in the catalyst precursor solution, taking out the carrier after dipping is completed, and drying and calcining the carrier to obtain the catalyst. The monolithic perovskite catalyst provided by the invention is low in preparation cost and low in energy consumption, and has high catalytic activity.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to an integral perovskite catalyst and a preparation method for efficiently reducing pollutant emissions from fuel vehicles. Background technique [0002] In recent years, with the improvement of the mechanization level of coal mine mining, soot particles and various toxic and harmful gases produced by underground fuel vehicles in the working process have caused great harm to underground workers, so it is very important to control the exhaust gas of underground fuel vehicles . [0003] At present, for the problem that the exhaust gas of underground fuel vehicles is difficult to diffuse and the pollution is serious, the use of catalysts in my country is an effective means of treatment. Four-way catalysts mainly include noble metal four-way catalysts and non-precious metal four-way catalysts. Compared with transition metals, noble metal catalysts have higher a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/34B01J23/889B01D53/94B01D53/62B01D53/56B01D53/72F01N3/28
CPCB01J23/83B01J23/34B01J23/8892B01J23/002B01D53/945B01D53/62B01D53/56B01D53/72F01N3/2828B01D2257/502B01D2257/702B01J2523/00F01N2510/06B01J2523/23B01J2523/3718B01J2523/842B01J2523/72B01J2523/845B01J2523/17
Inventor 聂文周伟伟袁明月闫嘉祎鲍秋张海涵王泓坤刘笑飞
Owner SHANDONG UNIV OF SCI & TECH
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