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A kind of preparation method of perovskite type catalytic material

A catalytic material, perovskite-type technology, applied in catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of complex preparation process, low surface area and surface catalytic reaction efficiency, and high cost, To achieve the effect of inhibiting the increase of particles, improving performance and improving particle agglomeration

Active Publication Date: 2021-10-22
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation methods of porous perovskites, such as the template method, are complex and costly, and other methods also require high temperature and long-term calcination, resulting in lower surface area and surface catalytic reaction efficiency.

Method used

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  • A kind of preparation method of perovskite type catalytic material
  • A kind of preparation method of perovskite type catalytic material
  • A kind of preparation method of perovskite type catalytic material

Examples

Experimental program
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Embodiment 1

[0029] This embodiment provides a method for preparing a perovskite-type catalytic material, which includes the following steps,

[0030] (1) Weigh the perovskite metal oxide and metal nitrate precursor respectively; the perovskite metal oxide is LaCoO 3 , LaMnO 3 、LaFeO 3 、LaNiO 3 、LaCrO 3 , La 1-x Sr x CoO 3 、LaCo 1-x Mg x o 3 or La 1-x Ce x CoO 3 One of. Present embodiment 1 selects La for use 0.9 Sr 0.1 CoO 3 .

[0031] The metal nitrate precursor is one of rare earth nitrates, transition metal nitrates or alkaline earth metal nitrates. The rare earth nitrate is one of lanthanum nitrate, cerium nitrate, gadolinium nitrate, samarium nitrate or neodymium nitrate. The transition metal nitrate is one of cobalt nitrate, manganese nitrate, iron nitrate, nickel nitrate, copper nitrate or chromium nitrate. The alkaline earth metal nitrate is one of magnesium nitrate, calcium nitrate, strontium nitrate or calcium nitrate.

[0032] In this embodiment, the metal n...

Embodiment 2

[0042] This embodiment provides a method for preparing a perovskite-type catalytic material, which includes the following steps,

[0043] (1) Weigh the perovskite metal oxide and metal nitrate precursor respectively; the perovskite metal oxide is LaCoO 3 , LaMnO 3 、LaFeO 3 、LaNiO 3 、LaCrO 3 , La 1-x Sr x CoO 3 、LaCo 1-x Mg x o 3 or La 1-x Ce x CoO 3 One of. This embodiment chooses LaMnO 3 .

[0044] The metal nitrate precursor is one of rare earth nitrates, transition metal nitrates or alkaline earth metal nitrates. The rare earth nitrate is one of lanthanum nitrate, cerium nitrate, gadolinium nitrate, samarium nitrate or neodymium nitrate. The transition metal nitrate is one of cobalt nitrate, manganese nitrate, iron nitrate, nickel nitrate, copper nitrate or chromium nitrate. The alkaline earth metal nitrate is one of magnesium nitrate, calcium nitrate, strontium nitrate and calcium nitrate.

[0045] In this embodiment, the metal nitrate precursor is transi...

Embodiment 3

[0053] This embodiment provides a method for preparing a perovskite-type catalytic material, which includes the following steps,

[0054] (1) Weigh the perovskite metal oxide and metal nitrate precursor respectively; the perovskite metal oxide is LaCoO 3 .

[0055] The metal nitrate precursor is one of rare earth nitrates, transition metal nitrates or alkaline earth metal nitrates. The rare earth nitrate is one of lanthanum nitrate, cerium nitrate, gadolinium nitrate, samarium nitrate or neodymium nitrate. The transition metal nitrate is one of cobalt nitrate, manganese nitrate, iron nitrate, nickel nitrate, copper nitrate or chromium nitrate. The alkaline earth metal nitrate is one of magnesium nitrate, calcium nitrate, strontium nitrate and calcium nitrate.

[0056] In this embodiment, the metal nitrate precursor is transition metal nitrate Mn(NO 3 ) 2 ;

[0057] (2) Put the perovskite metal oxide, metal nitrate precursor and deionized water in step (1) into the reacti...

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Abstract

The invention relates to a preparation method of a perovskite-type catalytic material, which comprises the following steps: 1. Weighing the perovskite metal oxide and metal nitrate precursor respectively; 2. The perovskite metal oxide, metal The nitrate precursor and deionized water are put into the reaction kettle at the same time, the addition amount of the metal nitrate precursor is 1-5wt% of the perovskite metal oxide weight, and 2-10ml of perovskite metal oxide is added Deionized water; 3. Seal the above reaction kettle and place it in an oven at 200-250°C for 3-5 hours; 4. After the reaction, cool naturally, wash and filter with ethanol and deionized water alternately; 5. Dry at 80°C, and then Baking at 600°C for 1‑3h. The invention improves the deficiency of the perovskite metal oxide catalyst prepared by the traditional method by adding metal ions to optimize the treatment of the perovskite metal oxide catalyst, increases the specific surface area, and thus catalyzes and degrades methane more efficiently.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials, in particular, it relates to a preparation method of a perovskite type catalytic material. Background technique [0002] At present, the world's energy is still based on fossil energy such as coal and oil. With the improvement of people's awareness of environmental protection, clean energy natural gas with methane as the main component has obvious advantages in the process of energy development and use, but its use has brought development and progress to the world, but it has also brought environmental pollution and other problems. Among hydrocarbons, methane is the most difficult to oxidize, and this low reactivity is related to the symmetry of its molecule. Traditional methane combustion needs to be carried out at a high temperature above 1500°C, so it produces NOx, CO and other gas pollutants that seriously pollute the environment; and methane itself is a greenhouse gas, and its g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/83B01J23/889B01J37/10B01J35/10A62D3/30A62D101/20
CPCA62D3/30B01J23/83B01J23/8892B01J37/10A62D2101/20B01J35/613
Inventor 王赛飞刘洁段二红牛建瑞刘浩彬张龙张亦媛
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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