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A kind of nano-carbon material supporting cobalt-zinc bimetal, its preparation method and application in catalytic oxidation of magnesium sulfite

A nano-carbon material and bimetallic technology, applied in the direction of magnesium sulfate, metal/metal oxide/metal hydroxide catalyst, separation method, etc., can solve the limitation of magnesium sulfate purification and commercial resource application, the influence of magnesium sulfate purity, Environmental pollution and other problems, to achieve the effect of improving the catalytic reaction rate, green process, and strengthening the mass transfer process

Active Publication Date: 2022-08-09
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the oxidation process of magnesium sulfite, the liquid homogeneous transition metal ions will be lost with the desulfurization effluent, and cause pollution to the environment. Secondly, the residual transition metal ions will affect the purity of the desulfurization by-product magnesium sulfate, resulting in magnesium sulfate The purification and commercial resource application are greatly restricted

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  • A kind of nano-carbon material supporting cobalt-zinc bimetal, its preparation method and application in catalytic oxidation of magnesium sulfite
  • A kind of nano-carbon material supporting cobalt-zinc bimetal, its preparation method and application in catalytic oxidation of magnesium sulfite
  • A kind of nano-carbon material supporting cobalt-zinc bimetal, its preparation method and application in catalytic oxidation of magnesium sulfite

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Embodiment 1

[0035] A kind of supported cobalt-zinc bimetallic nano-carbon material of the present embodiment, the preparation method thereof comprises the following steps:

[0036] 1) Synthesis of ZIF-8: Dissolve 5.95 g of zinc acetate hexahydrate in 150 mL of methanol to form a clear solution a; dissolve 6.16 g of 2-methylimidazole in 150 mL of methanol to form a clear solution b. Then slowly add solution b to solution a; stir at 25°C for 24 hours and centrifuge to obtain a white precipitate; then wash with methanol and then dry at 60°C to obtain ZIF-8.

[0037] 2) Preparation of composite carbon material: Disperse the above 0.5g ZIF-8 in 50mL methanol solution to form solution I; dissolve 5.82g cobalt nitrate hexahydrate in 50mL methanol to form solution II; dissolve 6.16g 2-methylimidazole Dissolve in 50 mL methanol to form clear solution III. Then, solution II was slowly added to solution I to form mixed solution IV; then solution III was added to mixed solution IV to form mixed solu...

Embodiment 2

[0040] A kind of supported cobalt-zinc bimetallic nano-carbon material of the present embodiment, the preparation method thereof comprises the following steps:

[0041] 1) Synthesis of ZIF-8: Dissolve 5.95 g of zinc acetate hexahydrate in 150 mL of methanol to form a clear solution a; dissolve 6.57 g of 2-methylimidazole in 150 mL of methanol to form a clear solution b. Then slowly add solution b to solution a; stir at 25°C for 24 hours and centrifuge to obtain a white precipitate; then wash with methanol and then dry at 60°C to obtain ZIF-8.

[0042]2) Preparation of composite carbon material: above-mentioned 0.5g ZIF-8 was dispersed in 50mL methanol solution to form solution I; 11.64g cobalt nitrate hexahydrate was dissolved in 50mL methanol to form solution II; 6.16g 2-methylimidazole Dissolve in 50 mL methanol to form clear solution III. Then, solution II was slowly added to solution I to form mixed solution IV; then solution III was added to mixed solution IV to form mix...

Embodiment 3

[0045] A kind of supported cobalt-zinc bimetallic nano-carbon material of the present embodiment, the preparation method thereof comprises the following steps:

[0046] 1) Synthesis of ZIF-8: Dissolve 5.95 g of zinc acetate hexahydrate in 150 mL of methanol to form a clear solution a; dissolve 6.57 g of 2-methylimidazole in 150 mL of methanol to form a clear solution b. Then slowly add solution b to solution a; stir at 30°C for 30 hours and centrifuge to obtain white precipitate; then wash with methanol and then dry at 60°C to obtain ZIF-8.

[0047] 2) Preparation of composite carbon material: Disperse the above 0.5g ZIF-8 in 50mL methanol solution to form solution I; dissolve 5.82g cobalt nitrate hexahydrate in 50mL methanol to form solution II; dissolve 6.16g 2-methylimidazole Dissolve in 50 mL methanol to form clear solution III. Then, solution II was slowly added to solution I to form mixed solution IV; then solution III was added to mixed solution IV to form mixed soluti...

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Abstract

The invention discloses a preparation method of a supported cobalt-zinc bimetallic nano-carbon material with high oxidation performance to magnesium sulfite. The composite material is a porous carbon material modified by cobalt-zinc bimetallic particles. The preparation steps include: self-made The metal-organic framework ZIF-8 and cobalt nitrate hexahydrate are mixed and stirred in methanol solution, heated and centrifuged, and the dried mixture is calcined in a protective atmosphere to obtain a cobalt-zinc bimetallic nanocarbon material. The method of the invention uses a metal-organic framework material containing cobalt and zinc as a precursor, the modification of the cobalt-zinc bimetal to the porous carbon material is completed in one step, and the synthesis process is green and environmentally friendly; Efficient catalytic oxidation of magnesium.

Description

technical field [0001] The invention belongs to the technical fields of chemical engineering, functional materials and catalytic material preparation, and in particular relates to a cobalt-zinc bimetallic nano-carbon material, a preparation method thereof, and an application in catalytic oxidation of magnesium sulfite. Background technique [0002] SO 2 The harm to the environment and human body is becoming more and more serious, and flue gas desulfurization technology has become the control of atmospheric SO 2 important means of emission. The magnesium-based flue gas desulfurization process in the wet desulfurization technology is adopted by the flue gas desulfurization of small and medium-sized industrial boilers due to its advantages of small required area, energy saving, and no fouling, and has a broad development and application space in the future. Among them, the oxidation of magnesium sulfite is a key step in the magnesium-based desulfurization process. Numerous s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/80B01D53/86B01D53/50C01F5/40
CPCB01J23/80B01D53/8609C01F5/40B01D2258/0283
Inventor 刘洁张靖楠吴楠汪黎东
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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