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A low-temperature catalytic decomposition of n 2 The preparation method of the porous nio nanosheet catalyst of o

A nano-sheet, low-temperature catalysis technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, separation method, etc., can solve the problem of high conversion rate temperature, achieve high catalytic activity, and facilitate industrialization Production and raw materials are cheap and easy to obtain

Active Publication Date: 2020-11-06
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is to solve existing as catalytic N 2 O decomposition catalyst NiO needs to add additives such as alkali metals or alkaline earth metals to improve the catalytic performance, and the conversion temperature T100 and T50 values ​​​​are high, providing a low-temperature catalytic decomposition of N 2 Preparation method of porous NiO nanosheet catalyst for O

Method used

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  • A low-temperature catalytic decomposition of n <sub>2</sub> The preparation method of the porous nio nanosheet catalyst of o
  • A low-temperature catalytic decomposition of n <sub>2</sub> The preparation method of the porous nio nanosheet catalyst of o
  • A low-temperature catalytic decomposition of n <sub>2</sub> The preparation method of the porous nio nanosheet catalyst of o

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Weigh 1.18g NiCl 2 ·6H 2 O and 0.4g NaOH were completely dissolved in 10mL and 30mL deionized water respectively, and the obtained NaOH solution was added NiCl under stirring condition. 2 solution, transfer the mixed solution to a reaction kettle and seal it, place it in an electronic furnace and raise the temperature to 180°C for 10 hours. After the reaction is completed, cool it to room temperature, filter it with suction to obtain a green precipitate, and wash it several times with deionized water and absolute ethanol , placed in an oven and dried at 60°C to obtain a precursor, as attached figure 1 As shown in a, the dried precipitate was annealed in a quartz tube furnace at 300 °C for 2 hours, and the heating rate was 5 °C min -1 , as attached figure 1 As shown in b, the porous NiO nanosheet catalyst.

[0025] Take 300 mg of the above catalyst and put it into the 8 mm quartz reaction tube of the continuous flow micro-reaction device, and feed N 2 The mixed gas ...

Embodiment example 2

[0027] The annealing temperature in Example 1 was changed to 400°C.

[0028] Adopt embodiment 1 evaluation condition, under above-mentioned evaluation condition, obtain its specific surface area by attached table 1 and be 72m 2 g -1 , it can be seen from Figure 3 that when the catalytic temperature is 380°C, N 2 O conversion reaches 100%.

Embodiment 3

[0030] The annealing temperature in Example 1 was changed to 500°C.

[0031] Adopt embodiment 1 evaluation condition, under above-mentioned evaluation condition, obtain its specific surface area by attached table 1 and be 33m 2 g -1 , it can be seen from Figure 3 that when the catalytic temperature is 420°C, N 2 O conversion reaches 100%.

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Abstract

The present invention relates to N 2 O Air pollution control technical field, specifically involving a low-temperature catalytic decomposition of N 2 A method for preparing a porous NiO nanosheet catalyst for O; the sodium hydroxide solution is continuously stirred and added to the nickel chloride solution, followed by a hydrothermal reaction, followed by suction filtration, drying, calcination and other steps to obtain a porous NiO nanosheet catalyst; The prepared catalyst has excellent pore structure and high specific surface area, showing excellent low-temperature catalytic performance; the preparation process is simple and does not add any additives, and has the advantages of low cost and environmental friendliness; when the calcination temperature is 300°C, Specific surface area is 192 m 2 g ‑1 , can convert N at 300℃ 2 O completely decomposes into N 2 andO 2 , N at 230℃ 2 The O decomposition rate is 50%, which can efficiently catalyze the decomposition of N 2 O, has broad application prospects.

Description

technical field [0001] The present invention relates to N 2 O air pollution control technical field, be specifically related to a kind of low-temperature catalytic decomposition N 2 Preparation of Porous NiO Nanoflake Catalysts for O. Background technique [0002] Nitrous oxide not only produces greenhouses, but also destroys the ozone layer and accelerates the formation of acid rain. N 2 The emission of O is not only from nature, but also from human industrial production, such as the production of adipic acid and nitric acid and fluidized bed burners for sludge or industrial waste treatment, etc. Therefore, N 2 The emission control and reduction of O has become one of the hot topics in the field of environmental research. Direct catalytic N 2 O decomposes into N 2 and O 2 is considered to reduce N 2 O the most promising solution. A variety of catalysts have been developed for N 2 O direct decomposition, including supported noble metal catalysts, composite metal ox...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J35/10B01D53/86B01D53/56C01G53/04
CPCB01D53/8628C01G53/04B01J23/755C01P2004/04C01P2006/12C01P2006/14C01P2006/16B01D2258/06B01D2257/402B01J35/23B01J35/613B01J35/615B01J35/633B01J35/647Y02C20/10Y02A50/20
Inventor 郭春丽尹敏帅卫欢侯利锋卫英慧
Owner TAIYUAN UNIV OF TECH
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