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CeO2-MoO3/graphene low-temperature denitration catalyst and preparation method

A low-temperature denitration and graphene technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve problems such as affecting the life of catalysts

Active Publication Date: 2014-04-23
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical purpose of the present invention is to solve a series of problems affecting the life of the catalyst caused by the high working temperature window (350°C-400°C) of the existing SCR denitrification catalyst

Method used

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  • CeO2-MoO3/graphene low-temperature denitration catalyst and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1 a kind of CeO 2 -MoO 3 / Graphene low-temperature denitrification catalyst (C 5 m 5 C) Preparation:

[0036] Include the following steps:

[0037] (1) Wash a certain amount of graphene with deionized water, and then dry it in an oven at 105°C for use;

[0038](2) Pour the graphene prepared in (1) into deionized water 5 times the mass of the graphene, place it in a 60°C environment and stir for 2 hours to obtain a mixture A;

[0039] (3) taking a cerium nitrate solution with a cerium element content of 5 parts by weight and introducing it into the mixture A, and stirring it in an environment of 60° C. for 5 hours to obtain a mixture B;

[0040] (4) Weigh 5 parts by weight of molybdenum trioxide and dissolve it in ammonia water 3 times the mass of molybdenum trioxide to obtain solution B;

[0041] (5) Import the solution B obtained in step (4) into the mixture B with a graphene content of 90 parts by weight, then add concentrated nitric acid to adjust th...

Embodiment 2

[0043] Embodiment 2 a kind of CeO 2 -MoO 3 / Graphene low-temperature denitrification catalyst (C 5 m 10 C) Preparation

[0044] Include the following steps:

[0045] Steps (1) to (3) are the same as in Example 1;

[0046] (4) Weigh 10 parts by weight of molybdenum trioxide and dissolve it in ammonia water 3 times the mass of molybdenum trioxide to obtain solution B;

[0047] (5) Import the solution B obtained in step (4) into the mixture B with a graphene content of 85 parts by weight, then add concentrated nitric acid to adjust the pH value to 1, shake at 60°C for 5h, and then heat up to 80°C and drying at 80°C for 48 hours to obtain mixture C;

[0048] (6) Put the mixture C obtained in step (5) in a muffle furnace, and raise the temperature to 350°C at 10°C / min. 2 Calcined for 6 hours under the protection of the atmosphere, and ground into 50-200 meshes to obtain the catalyst C 5 m 10 C, which includes cerium oxide with a mass percentage of 5%, molybdenum trioxide w...

Embodiment 3

[0049] Embodiment 3 a kind of CeO 2 -MoO 3 / Graphene low-temperature denitrification catalyst (C 10 m 5 C) Preparation

[0050] Follow these steps:

[0051] Steps (1) to (2) are the same as in Example 1;

[0052] (3) taking a cerium nitrate solution with a cerium element content of 10 parts by weight and introducing it into the mixture A, placing it in an environment of 60° C. and stirring for 5 hours to obtain a mixture B;

[0053] (4) Weigh 5 parts by weight of molybdenum trioxide and dissolve it in ammonia water 3 times the mass of molybdenum trioxide to obtain solution B;

[0054] (5) Import the solution B obtained in step (4) into the mixture B with a graphene content of 85 parts by weight, then add concentrated nitric acid to adjust the pH value to 1, shake at 60°C for 5h, and then heat up to 80°C and drying at 80°C for 48 hours to obtain mixture C;

[0055] (6) Put the mixture C obtained in step (5) in a muffle furnace, and raise the temperature to 350°C at 10°C / ...

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Abstract

The invention discloses a CeO2-MoO3 / graphene low-temperature denitration catalyst and a preparation method. The CeO2-MoO3 / graphene low-temperature denitration catalyst comprises the following materials in percentage by weight: 5%-15% of cerium oxide, 5%-10% of molybdenum trioxide and the balance being graphene. The CeO2-MoO3 / graphene low-temperature denitration catalyst can keep good denitration performance at the temperature of about 200 DEG C, the reduction rate of NOx can be increased to 81%-88%, and simultaneously, the oxidation of SO2 is also inhibited.

Description

technical field [0001] The invention relates to the technical field of air pollution purification, in particular to a CeO 2 -MoO 3 / Graphene low-temperature denitration catalyst and preparation method thereof. Background technique [0002] Nitrogen oxides in the atmosphere are mainly produced by man-made pollution sources. Nitrogen oxide pollution mainly comes from the combustion of fossil fuels such as coal, oil, and natural gas used in production and daily life. One of the biggest sources of nitrogen oxides in the air is thermal power generation. According to statistics, in 2005 my country's total nitrogen oxide emissions exceeded 19 million tons, of which coal-fired power plants emitted 7 million tons, followed by industry and transportation sectors, which contributed 23% and 20% respectively. However, more than 70% of my country's electricity supply comes from coal-fired power generation. From the perspective of my country's current national conditions and energy se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01D53/86B01D53/56
Inventor 吴乐罗嘉刘小伟潘凤萍黄卫剑赵波刘哲苏凯任娟娟
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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