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Preparation method for porous NiO nano slice catalyst for catalyzing and decomposing N2O at low temperature

A nano-sheet, low-temperature catalysis technology, applied in physical/chemical process catalysts, separation methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of high conversion rate and high temperature, achieve high catalytic activity, preparation method Simple and convenient for industrial production

Active Publication Date: 2018-06-12
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 Catalyst NiO for O decomposition In order to improve the catalytic performance, additives such as alkali metals or alkaline earth metals need to be added, 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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  • Preparation method for porous NiO nano slice catalyst for catalyzing and decomposing N2O at low temperature
  • Preparation method for porous NiO nano slice catalyst for catalyzing and decomposing N2O at low temperature
  • Preparation method for porous NiO nano slice catalyst for catalyzing and decomposing N2O at low temperature

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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 the 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 of O and Ar reacts, N 2 ...

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 , by attached image 3 It can be seen 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 , by attached image 3 It can be seen that when the catalytic temperature is 420°C, N 2 O conversion reaches 100%.

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Abstract

The invention relates to the technical field of N2O air pollution control, in particular to a preparation method for a porous NiO nano slice catalyst for catalyzing and decomposing N2O at a low temperature. The preparation method comprises the following steps of adding a sodium hydroxide solution into a nickel chloride solution while continuously stirring, performing hydrothermal reaction, and performing steps such as suction filtration, drying and roasting, thereby obtaining the porous NiO nano slice catalyst. The prepared catalyst has an excellent pore structure and a high specific surface area, and shows excellent low-temperature catalytic performances; the preparation method has the advantages of being simple and convenient to operate, not adding any additive, being low in cost, beingenvironmentally friendly and the like; when a roasting temperature is 300 DEG C, the specific surface area is 192m<2>g<-1>, N2O can be completely decomposed into N2 and O2 at a temperature of 300 DEGC, a N2O decomposition rate is 50% at a temperature of 230 DEG C, N2O can be efficiently catalyzed and decomposed, and the application prospect is wide.

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 Applications(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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