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Preparation method of nitric acid industrial carbon emission reduction catalyst

A catalyst and carbon emission reduction technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve problems such as unsatisfactory thermal stability, and achieve water vapor resistance and stability Good, stable performance, simple and easy method

Pending Publication Date: 2022-03-11
XIAN ORIGIN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Publication No. CN102489305A patent discloses a catalytic decomposition of N 2 The transition metal composite oxide catalyst of O, copper oxide in the transition metal oxide is 1% ~ 15% of the total mass of the catalyst, and the cocatalyst is one or more selected from cerium oxide, iron oxide, zirconium oxide, Zinc oxide promoter, which accounts for 1% to 10% of the total mass of the catalyst, can convert N 2 O completely decomposes into N 2 and O 2 , but the thermal stability of this supported transition metal composite oxide cannot satisfy the N 2 Decomposition of O

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  • Preparation method of nitric acid industrial carbon emission reduction catalyst

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Embodiment 1

[0031] This embodiment includes the following steps:

[0032] Step 1. Prepare impregnation solution: dissolve the active component precursor and auxiliary agent precursor in deionized water according to the mass ratio of 0.5:1 to obtain a transparent impregnation solution; the active component precursor is cobalt acetate, and the auxiliary agent The precursor is platinum nitrate;

[0033] Step 2. Preparation of catalyst precursor: at room temperature, cerium oxide powder with a particle size of less than 10 μm was added as a carrier to the impregnation solution obtained in step 1 for 2.0 hours to obtain a paste, and then the paste was placed at 80 Dry at ℃ for 24 hours to obtain a catalyst precursor; the ratio of the mass of the ceria powder to the volume of the impregnating solution is 100:20, the unit of mass is g, and the unit of volume is mL;

[0034] Step 3. Catalyst molding: mix montmorillonite, cornstarch and the catalyst precursor obtained in step 2 uniformly accordin...

Embodiment 2

[0040] This embodiment includes the following steps:

[0041] Step 1. Prepare impregnation solution: dissolve the active component precursor and auxiliary agent precursor in deionized water at a mass ratio of 10:0.01 to obtain a transparent impregnation solution; the active component precursor is cobalt and aluminum Cobalt acetate and aluminum acetate with a mass ratio of 3:1, and the precursor of the auxiliary agent is palladium nitrate;

[0042] Step 2. Preparation of catalyst precursor: at room temperature, cerium oxide powder with a particle size of less than 10 μm was added as a carrier to the impregnation solution obtained in step 1 for 1.0 h to obtain a paste, and then the paste was placed at 110 Dry at ℃ for 48 hours to obtain a catalyst precursor; the ratio of the mass of the ceria powder to the volume of the impregnating solution is 100:100, the unit of mass is g, and the unit of volume is mL;

[0043] Step 3. Catalyst molding: mix pseudo-boehmite, hydroxymethylprop...

Embodiment 3

[0048] This embodiment includes the following steps:

[0049] Step 1. Prepare impregnation solution: dissolve the active component precursor and auxiliary agent precursor in deionized water according to the mass ratio of 2.5:0.15 to obtain a transparent impregnation solution; the active component precursor is cobalt element and aluminum element Cobalt nitrate and aluminum nitrate with a mass ratio of 4:1, the additive precursor is ruthenium chloride;

[0050] Step 2. Preparation of catalyst precursor: at room temperature, cerium oxide powder with a particle size of less than 10 μm was added as a carrier to the impregnation solution obtained in step 1 for 1.0 h to obtain a paste, and then the paste was placed at 110 Dry at ℃ for 24 hours to obtain a catalyst precursor; the ratio of the mass of the ceria powder to the volume of the impregnating solution is 100:50, the unit of mass is g, and the unit of volume is mL;

[0051] Step 3. Catalyst forming: mix bentonite, hydroxymethy...

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Abstract

The invention discloses a preparation method of a nitric acid industrial carbon emission reduction catalyst. The method comprises the following steps: 1, dissolving an active component precursor and an auxiliary agent precursor in deionized water to obtain a transparent dipping solution; 2, adding the cerium dioxide powder into a dipping solution for dipping treatment, and drying to obtain a catalyst precursor; 3, uniformly mixing an adhesive, a pore forming agent and the catalyst precursor, adding water, kneading, and carrying out extrusion molding to obtain a catalyst blank; and 4, drying the catalyst blank, and roasting to obtain the nitric acid industrial carbon emission reduction catalyst. According to the present invention, the types and the proportions of the active components and the auxiliary agent are designed, and the roasting treatment process and the process parameters are controlled so as to obtain the catalyst with the relatively dispersed active components and the high crystallinity, such that the number of the effective active centers in the catalyst is increased so as to improve the activity of the catalyst, and the catalyst has better high-temperature stability and is suitable for N2O emission reduction in the nitric acid production process.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a preparation method of a catalyst for carbon emission reduction in nitric acid industry. Background technique [0002] It is generally believed that the current atmospheric greenhouse gas composition of N 2 O's contribution to global warming is second only to CO 2 and CH 4 . Since the Industrial Revolution, atmospheric N 2 The content of O continues to increase, and the growth rate is as high as 12.9%. It mainly comes from the coal-fired flue gas of fixed fluidized bed equipment, the production process of nitric acid, and the waste gas discharged from the production process of chemical products such as adipic acid and nylon. Therefore, control and elimination of N from industrial production 2 O to arouse the great attention of governments and environmental protection scholars. [0003] The existing catalytic direct decomposition technology is to c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/02B01D53/86
CPCB01J23/002B01J23/894B01D53/8628B01J2523/00B01J35/40B01J2523/3712B01J2523/828B01J2523/845B01J2523/31B01J2523/824B01J2523/821Y02C20/10
Inventor 黄伟龚甍仵静满雪
Owner XIAN ORIGIN CHEM TECH
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