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A kind of activated carbon supported bimetallic composite material and its preparation method and application method

A composite material and application method technology, applied in the field of activated carbon-loaded bimetallic composite materials and preparation, to achieve the effects of easy realization, simple preparation method, and high reduction efficiency

Active Publication Date: 2021-10-01
XIANGTAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, in order to ensure the continuous, efficient and economical denitrification process, there is an application in the prior art to quickly reduce Fe(II)EDTA-NO to Fe(II)EDTA with active metals, for example: use iron powder to reduce and regenerate the denitrification liquid , to achieve better results, but the reduction product is high in NH4 + selectivity

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  • A kind of activated carbon supported bimetallic composite material and its preparation method and application method

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preparation example Construction

[0032] A preparation method of activated carbon-supported bimetallic composite material, the method comprising:

[0033] Add the iron salt to the mixed solvent of PEG-400, absolute ethanol and dilute hydrochloric acid, the pH value is 2-4, after completely dissolving, the iron salt with a mass concentration of 5-20g / L is obtained; add activated carbon, activated carbon and iron salt The mass ratio is 1-5:1, and the reaction is stirred for 8-12 hours to obtain activated carbon a loaded with iron ions or ferrous ions.

[0034] Add the sodium borohydride solution to activated carbon a, the molar ratio of the added sodium borohydride to iron salt is 1-5:1, and reduce the iron ion or Ferrous ions are reduced to zero-valent nano-iron to obtain activated carbon-supported nano-iron b.

[0035] The second metal salt is added to the mixed solvent of PEG-400, absolute ethanol and distilled water, and the pH value is 5-7. After completely dissolving, add activated carbon to support nano-...

specific Embodiment 1

[0042] A preparation method of activated carbon-supported bimetallic composite material, the method comprising:

[0043] FeCl 3 ·6H 2 O was added to the mixed solvent of PEG-400, absolute ethanol and dilute hydrochloric acid, the pH value was 3, and after complete dissolution, an iron ion solution with a mass concentration of 10g / L was obtained; activated carbon was added, and the mass ratio of activated carbon to iron salt was 3 : 1, placed in a constant temperature water bath at 35°C, stirred and reacted for 9 hours to obtain activated carbon a loaded with iron ions.

[0044] Add sodium borohydride solution with a mass concentration of 5% to activated carbon a, the molar ratio of added sodium borohydride to iron salt is 2:1, at a temperature of 30°C, under a nitrogen atmosphere, reduce for 2 hours to reduce iron ions into zero-valent nano-iron to obtain activated carbon-supported nano-iron b.

[0045] Cu(NO 3 ) 2 ·3H 2O was added to the mixed solvent of PEG-400, absolu...

specific Embodiment 2

[0052] A preparation method of activated carbon-supported bimetallic composite material, the method comprising:

[0053] Add ferrous chloride to the mixed solvent of PEG-400, absolute ethanol and dilute hydrochloric acid, the pH value is 2, after completely dissolving, a ferrous ion solution with a mass concentration of 20g / L is obtained; add activated carbon, activated carbon and iron salt The mass ratio was 1:1, and the reaction was stirred for 12 hours to obtain activated carbon a loaded with ferrous ions.

[0054] Add sodium borohydride solution to activated carbon a, the molar ratio of sodium borohydride to iron salt is 5:1, and reduce for 1 hour at a temperature of 35°C under a nitrogen atmosphere to reduce ferrous ions into zero-valent nano-iron , to obtain nano-iron b supported on activated carbon.

[0055] NiCl 2 ·6H 2 O was added to the mixed solvent of PEG-400, absolute ethanol and distilled water, and the pH value was 7. After it was completely dissolved, activa...

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Abstract

The invention discloses an activated carbon-loaded bimetallic composite material, a preparation method and an application method. The composite material comprises, by mass components, an activated carbon content of 50-80%, an iron content of 15-30%, and a second metal as the balance; The iron and the second metal are supported on activated carbon. Activated carbon-supported bimetallic composites are applied in the process of reducing Fe(II)EDTA‑NO, which can quickly reduce Fe(II)EDTA‑NO to Fe(II)EDTA and N 2 , high reduction efficiency, reduced to N 2 High selectivity.

Description

technical field [0001] The invention relates to the technical field of reducing agents, in particular to an activated carbon-supported bimetallic composite material, a preparation method and an application method. Background technique [0002] With the promulgation and implementation of regulations on the prevention and control of air pollution and the emission standards of air pollutants in various industries, the control of nitrogen oxides has become a key goal of emission reduction. Selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR) are mainstream commercial flue gas denitrification technologies, but there are problems such as high investment and operating costs, low low temperature activity, and the risk of ammonia slip, and low denitrification efficiency. [0003] The wet complexation absorption provides the possibility of low-cost and high-efficiency flue gas denitrification. The commonly used complexing absorbent is Fe(II)EDTA, which can...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/96B01D53/78B01D53/56
CPCB01D53/56B01D53/78B01D53/96B01D2251/20
Inventor 黄妍周婷张俊丰田凯勋曹靖
Owner XIANGTAN UNIV