Preparation method and application of nitrous oxide decomposition reaction catalyst

A catalyst and catalytic decomposition technology, applied in the direction of nitrous oxide capture, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve problems such as exhaust gas pollution, reduce emissions and reduce costs , the effect of low activation temperature

Inactive Publication Date: 2020-07-03
BEIJING UNIV OF CHEM TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the pollution problem of waste gas from adipic acid production equipment, and propose a method for preparing a novel metal oxide catalyst. The prepared catalyst can be used to directly catalyze and decompose N 2 o

Method used

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  • Preparation method and application of nitrous oxide decomposition reaction catalyst
  • Preparation method and application of nitrous oxide decomposition reaction catalyst
  • Preparation method and application of nitrous oxide decomposition reaction catalyst

Examples

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Embodiment 1

[0023] Example 1: Take 1000mL of deionization and pour it into a 2000mL beaker, add a magnetic stirring bar, stir and heat in a constant temperature magnetic stirrer, and set the temperature at 65°C. Add 157g of cobalt nitrate hexahydrate and 85g of strontium acetate into the beaker, stir and dissolve evenly; measure 1500mL of deionized water and add it to a 2000mL beaker, add a magnetic stirring bar, stir and heat in a constant temperature magnetic stirrer, set the temperature at 65°C, weigh Get 157g of anhydrous sodium carbonate and put it into a beaker; under the condition of heating and stirring in a water bath at 65°C, the rotating speed of the stirring paddle is 400r / min, and the precipitant Na 2 CO 3 Add the solution drop by drop to the metal nitrate solution, and control the mixing time for 1 hour. At the same time, the reaction kettle is controlled at 65°C through a water bath, and the pH of the suspension is adjusted to about 9. Then stop the dropwise addition, and c...

Embodiment 2

[0025] Embodiment 2: the Co obtained by changing the pH of washing in catalyst preparation in embodiment 1 is 7.5~7.8 3 o 4 ·SrCO 3 , carry out activity evaluation under the same conditions, other conditions are all the same as embodiment 1, gained experimental result sees image 3 .

Embodiment 3

[0026] Embodiment 3: Co 3 o 4 ·SrCO 3 , carry out activity evaluation under the same conditions, other conditions are all the same as embodiment 1, gained experimental result sees image 3 .

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Abstract

The invention discloses a preparation method and an application of a nitrous oxide decomposition reaction catalyst, and belongs to the technical field of waste gas purification treatment. The catalystcomprises a carrier, an auxiliary agent and an active substance; the catalyst is a compound of Co3O4 and a carbonic acid compound of any one or more metal elements selected from alkali earth metal Aor / and La; and the main active component in the metal oxide is Co3O4, and meanwhile, the alkali earth metal A such as Cs, Ba and other metal carbonates are used as a matrix or / and metal La carbonatesare used as a matrix to assist in dispersing Co3O4 and further reduce the cost. The catalyst can be used in the field of tail gas treatment in adipic acid production or nitric acid production. The catalyst disclosed by the invention can realize catalytic decomposition reaction of N2O, is simple in preparation process and wide in raw material source, and can provide an effective catalyst for the field of environmental governance.

Description

technical field [0001] The invention belongs to a preparation method and application of a catalyst for the purification treatment of adipic acid production waste gas, in particular to a metal composite oxide catalytic decomposition of N 2 O and methods for the preparation of catalysts of this type. It can be used for the treatment of adipic acid, cyclohexanol and nitrogen-containing waste gas discharged from nitric acid production plants. Background technique [0002] In recent years, due to the rapid increase in the market price of adipic acid, the number of adipic acid installations in my country has also increased rapidly. In 2016, the annual output has reached 3.5 million tons, accounting for almost half of the global production capacity. In the production of adipic acid, a large amount of waste gas will be produced, especially in the production of adipic acid, a large amount and high purity nitrous oxide (N 2 O), N 2 O is an important greenhouse gas. Its warming pote...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/232B01J23/75B01D53/86B01D53/56
CPCB01D53/8628B01D2257/402B01J23/75B01J27/232Y02C20/10Y02P20/30
Inventor 陈标华张傑赵铎史红军李英霞陈聚良屈建海陈亚春钟儒学朱子强金保国张军明刘水侠赵瑞冯继伟刘荣鸽梁甫徐宏宁
Owner BEIJING UNIV OF CHEM TECH
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