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Cobalt-zinc bimetallic loaded nano carbon material and preparation method and application thereof in catalytic oxidation of magnesium sulfite

A nano-carbon material, bimetal technology, applied in 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, the process is green and environmental protection, and achieving a high degree of dispersion

Active Publication Date: 2020-02-21
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Cobalt-zinc bimetallic loaded nano carbon material and preparation method and application thereof in catalytic oxidation of magnesium sulfite
  • Cobalt-zinc bimetallic loaded nano carbon material and preparation method and application thereof in catalytic oxidation of magnesium sulfite
  • Cobalt-zinc bimetallic loaded nano carbon material and preparation method and application thereof in catalytic oxidation of magnesium sulfite

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Embodiment 1

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

[0036] 1) Synthesis of ZIF-8: 5.95g of zinc acetate hexahydrate was dissolved in 150mL of methanol to form a clear solution a; 6.16g of 2-methylimidazole was dissolved in 150mL of methanol to form a clear solution b. Then slowly add solution b to solution a; centrifuge after stirring at 25°C for 24 hours to obtain a white precipitate; then wash with methanol and 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 Dissolved in 50 mL of methanol to form clear solution III. Then, slowly add solution II to solution I to form mixed solution IV; then add solution III to mixed solution IV to form mixed solution V; stir...

Embodiment 2

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

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

[0042]2) Preparation of composite carbon material: disperse the above 0.5g ZIF-8 in 50mL methanol solution to form solution I; dissolve 11.64g cobalt nitrate hexahydrate in 50mL methanol to form solution II; dissolve 6.16g 2-methylimidazole Dissolved in 50 mL of methanol to form clear solution III. Then, slowly add solution II to solution I to form mixed solution IV; then add solution III to mixed solution IV to form mixed solution V; stir...

Embodiment 3

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

[0046] 1) Synthesis of ZIF-8: 5.95g of zinc acetate hexahydrate was dissolved in 150mL of methanol to form a clear solution a; 6.57g of 2-methylimidazole was dissolved in 150mL of methanol to form a clear solution b. Then slowly add solution b to solution a; centrifuge after stirring at 30°C for 30 hours to obtain a white precipitate; then wash with methanol and 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 Dissolved in 50 mL of methanol to form clear solution III. Then, slowly add solution II to solution I to form mixed solution IV; then add solution III to mixed solution IV to form mixed solution V; stir...

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Abstract

The invention discloses a preparation method of a cobalt-zinc loaded bimetallic nano carbon material with efficient oxidation performance on magnesium sulfite. The composite material is a cobalt-zincbimetal particle modified porous carbon material, and the preparation method comprises the following steps: mixing and stirring a self-made metal organic framework ZIF-8 and cobalt nitrate hexahydratein a methanol solution, heating, centrifuging, and calcining the dried mixture in a protective atmosphere to obtain the cobalt-zinc bimetal loaded nano carbon material. According to the method, a metal organic framework material containing cobalt and zinc is used as a precursor, modification of a porous carbon material by cobalt-zinc bimetal is completed by a one-step method, and the synthesis process is green and environment-friendly; the synthesized metal-modified porous carbon material can realize efficient catalytic oxidation of magnesium sulfite.

Description

technical field [0001] The invention belongs to the technical fields of chemical engineering, functional materials and preparation of catalytic materials, and in particular relates to a nano-carbon material loaded with cobalt-zinc bimetal, 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 a 2 important means of emissions. The magnesium flue gas desulfurization process in the wet desulfurization technology is adopted by the flue gas desulfurization of small and medium-sized industrial boilers because of its advantages of small area required, energy saving, and no pollution. It will have broad development and application space in the future. Among them, the oxidation of magnesium sulfite is a key step in the magnesium desulfurization process. A large number of research r...

Claims

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Application Information

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Patent Type & Authority Applications(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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