catalytic decomposition n 2 o Preparation method of cobalt-based metal-organic framework-derived catalyst

An organic framework, catalytic decomposition technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, separation methods, etc., to achieve excellent activity, accelerated coordination rate, and excellent adsorption and desorption capabilities Effect

Active Publication Date: 2021-12-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] In summary, the existing patented technologies are mainly aimed at nitric acid plants, adipic acid plants, etc. 2 O. For flue gas with simple components, the catalytic reaction temperature range is generally high (>400°C), while for coal-fired boilers and industrial boilers with complex flue gas components, especially the tail of circulating fluidized bed boilers N 2 O Governance research is still blank

Method used

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  • catalytic decomposition n <sub>2</sub> o Preparation method of cobalt-based metal-organic framework-derived catalyst
  • catalytic decomposition n <sub>2</sub> o Preparation method of cobalt-based metal-organic framework-derived catalyst
  • catalytic decomposition n <sub>2</sub> o Preparation method of cobalt-based metal-organic framework-derived catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]Weigh 0.025mol of 2-methylimidazole and 0.025mol of triethylamine and dissolve them in 250ml of deionized water. Stir magnetically and sonicate for 20 minutes until the drug is completely dissolved. Slowly introduce 250mL dissolved with 0.01mol Co(NO 3 ) 2 ·6H 2 O solution, after standing at room temperature for 10 minutes, the solution was centrifuged at a high speed (5000r / min) and washed. The collected solid precipitate was dried in an oven at 110 °C for 6 h to obtain the precursor ZIF-67. The precursor was further heated to 650°C at a heating rate of 2°C / min in nitrogen, and then annealed after pyrolysis at 650°C for 3 hours to obtain the cobalt nanocomposite catalyst Co-650N supported on the porous carbon material.

Embodiment 2

[0034] The precursor ZIF-67 in Example 1 was heated to 550°C at a heating rate of 2°C / min in nitrogen, and then pyrolyzed for 3 hours. After annealing, the cobalt nanocomposite catalyst Co-550N supported on the porous carbon material was obtained. .

Embodiment 3

[0036] The precursor ZIF-67 in Example 1 was heated to 750°C at a heating rate of 2°C / min in nitrogen, and then pyrolyzed for 3 hours. After annealing, the cobalt nanocomposite catalyst Co-750N supported on the porous carbon material was obtained. .

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Abstract

The invention relates to the technical field of catalytic materials and air pollution control, and aims to provide a method for catalytically decomposing N 2 Preparation of cobalt-based metal-organic framework-derived catalysts for O. Including: dissolving 2-methylimidazole and proton-removing agent in deionized water, adding Co(NO 3 ) 2 ·6H 2 O solution; after standing at room temperature for 10 minutes, centrifuge and wash, collect the solid precipitate and dry it to obtain a precursor with a zeolite imidazolate skeleton structure; burn the precursor in an inert gas atmosphere for pyrolysis; naturally anneal and reduce After reaching room temperature, a cobalt-based metal-organic framework-derived catalyst is obtained. The invention provides a catalyst with a large specific surface area, well-dispersed active sites, excellent oxidation-reduction performance and adsorption-desorption capacity; the introduced proton-removing agent can greatly accelerate the coordination rate of metal ions and organic ligands, making The reaction proceeds rapidly in aqueous solution, which provides the possibility for rapid industrial synthesis. The catalyst has excellent activity, anti-sulfur poisoning and active regeneration ability at elevated temperature.

Description

technical field [0001] The invention belongs to the technical field of catalytic materials and air pollution control, and specifically relates to a method for directly catalytically decomposing N in boiler flue gas at medium and low temperatures. 2 O, Cobalt nanocomposite catalysts based on metal-organic frameworks (MOFs) derived on porous carbon materials and their preparation methods. Background technique [0002] Nitrous Oxide (Nitrous Oxide, N 2 O) has a strong ability to absorb atmospheric infrared radiation, and its greenhouse effect potential is about CO 2 310 times that of CH 4 and CO 2 the third largest greenhouse gas. N 2 O is chemically stable at room temperature and can exist stably in the troposphere for a long time. After entering the stratosphere, it can further react to generate NO, which consumes and destroys the ozone layer like conventional nitrogen oxides, causing an ozone hole. [0003] In recent decades, circulating fluidized bed (CFB) combustion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/28B01J31/22B01J35/02B01D53/86B01D53/56
CPCB01J31/28B01J31/22B01J35/023B01D53/8628B01D2258/0283B01D2257/402Y02C20/10
Inventor 王智化何勇朱燕群杨卫娟唐海荣周志军刘建忠周俊虎岑可法
Owner ZHEJIANG UNIV
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